Hasbe a hierarchical attribute based solution for flexible and scalable acces...parry prabhu
The document proposes a Hierarchical Attribute-Set-Based Encryption (HASBE) scheme to provide scalable and flexible access control for outsourced data in cloud computing. HASBE extends Ciphertext-Policy Attribute-Set-Based Encryption with a hierarchical user structure for scalability. It also supports compound attributes for flexibility and fine-grained access control. HASBE employs multiple expiration times to more efficiently revoke users compared to existing schemes. The security of HASBE is formally proven based on CP-ABE security. The scheme is implemented and experiments show it efficiently and flexibly handles access control for outsourced cloud data.
ATTRIBUTE-BASED DATA SHARING SCHEME REVISITED IN CLOUD COMPUTING,bulk ieee pr...Nexgen Technology
NEXGEN TECHNOLOGY is an Software Research and Development Company headquartered at Pondicherry, India, posses a strong support system, a well equipped, state-of-the-art development center and a dedicated team of professionals.
This document proposes a new approach called two layer encryption (TLE) to delegate fine-grained access control enforcement to public clouds while preserving data and user privacy. Under TLE, the data owner first performs coarse-grained encryption on data items and uploads them to the cloud. Then the cloud performs fine-grained re-encryption of the data based on access control policies provided by the owner. This allows user dynamics like revocations to be handled efficiently by the cloud without owner involvement. TLE also protects user attribute privacy from the cloud. Existing approaches require the owner to frequently re-encrypt and re-upload large amounts of data when users change, which is inefficient.
This document proposes a new approach called two layer encryption (TLE) to delegate fine-grained access control enforcement to public clouds while preserving data and user privacy. Under TLE, the data owner performs coarse-grained encryption and the cloud performs fine-grained re-encryption based on access control policies. This addresses limitations of existing approaches where the data owner must re-encrypt data whenever user credentials change. The TLE approach also keeps user identity attributes and data confidential from the cloud.
Final_attribute based encryption in cloud with significant reduction of compu...Naveena N
This document describes a student project that aims to improve ciphertext-policy attribute-based encryption (CP-ABE) for cloud storage. The project proposes a hierarchical CP-ABE structure to enhance scalability and flexibility while eliminating reliance on the storage server for access control. Performance measurements showed the scheme efficiently manages stored data and significantly reduces computation time required for decryption on resource-limited devices.
Secure and-verifiable-policy-update-outsourcing-for-big-data-access-control-i...Kamal Spring
Due to the high volume and velocity of big data, it is an effective option to store big data in the cloud, as the cloud has capabilities of storing big data and processing high volume of user access requests. Attribute-Based Encryption (ABE) is a promising technique to ensure the end-to-end security of big data in the cloud. However, the policy updating has always been a challenging issue when ABE is used to construct access control schemes. A trivial implementation is to let data owners retrieve the data and re-encrypt it under the new access policy, and then send it back to the cloud. This method, however, incurs a high communication overhead and heavy computation burden on data owners. A novel scheme is proposed that enable efficient access control with dynamic policy updating for big data in the cloud. Developing an outsourced policy updating method for ABE systems is focused. This method can avoid the transmission of encrypted data and minimize the computation work of data owners, by making use of the previously encrypted data with old access policies. Policy updating algorithms is proposed for different types of access policies. An efficient and secure method is proposed that allows data owner to check whether the cloud server has updated the ciphertexts correctly. The analysis shows that this policy updating outsourcing scheme is correct, complete, secure and efficient.
This document proposes an attribute-based encryption scheme with verifiable outsourced decryption. Existing attribute-based encryption schemes have expensive decryption costs due to pairing operations. To address this, prior work introduced outsourced decryption using a transformation key, but did not verify the correctness of the transformation. The proposed scheme modifies the model to allow verification and constructs a concrete scheme that proves security without random oracles, while substantially reducing computation time for resource-limited devices to recover plaintexts.
Hasbe a hierarchical attribute based solution for flexible and scalable acces...parry prabhu
The document proposes a Hierarchical Attribute-Set-Based Encryption (HASBE) scheme to provide scalable and flexible access control for outsourced data in cloud computing. HASBE extends Ciphertext-Policy Attribute-Set-Based Encryption with a hierarchical user structure for scalability. It also supports compound attributes for flexibility and fine-grained access control. HASBE employs multiple expiration times to more efficiently revoke users compared to existing schemes. The security of HASBE is formally proven based on CP-ABE security. The scheme is implemented and experiments show it efficiently and flexibly handles access control for outsourced cloud data.
ATTRIBUTE-BASED DATA SHARING SCHEME REVISITED IN CLOUD COMPUTING,bulk ieee pr...Nexgen Technology
NEXGEN TECHNOLOGY is an Software Research and Development Company headquartered at Pondicherry, India, posses a strong support system, a well equipped, state-of-the-art development center and a dedicated team of professionals.
This document proposes a new approach called two layer encryption (TLE) to delegate fine-grained access control enforcement to public clouds while preserving data and user privacy. Under TLE, the data owner first performs coarse-grained encryption on data items and uploads them to the cloud. Then the cloud performs fine-grained re-encryption of the data based on access control policies provided by the owner. This allows user dynamics like revocations to be handled efficiently by the cloud without owner involvement. TLE also protects user attribute privacy from the cloud. Existing approaches require the owner to frequently re-encrypt and re-upload large amounts of data when users change, which is inefficient.
This document proposes a new approach called two layer encryption (TLE) to delegate fine-grained access control enforcement to public clouds while preserving data and user privacy. Under TLE, the data owner performs coarse-grained encryption and the cloud performs fine-grained re-encryption based on access control policies. This addresses limitations of existing approaches where the data owner must re-encrypt data whenever user credentials change. The TLE approach also keeps user identity attributes and data confidential from the cloud.
Final_attribute based encryption in cloud with significant reduction of compu...Naveena N
This document describes a student project that aims to improve ciphertext-policy attribute-based encryption (CP-ABE) for cloud storage. The project proposes a hierarchical CP-ABE structure to enhance scalability and flexibility while eliminating reliance on the storage server for access control. Performance measurements showed the scheme efficiently manages stored data and significantly reduces computation time required for decryption on resource-limited devices.
Secure and-verifiable-policy-update-outsourcing-for-big-data-access-control-i...Kamal Spring
Due to the high volume and velocity of big data, it is an effective option to store big data in the cloud, as the cloud has capabilities of storing big data and processing high volume of user access requests. Attribute-Based Encryption (ABE) is a promising technique to ensure the end-to-end security of big data in the cloud. However, the policy updating has always been a challenging issue when ABE is used to construct access control schemes. A trivial implementation is to let data owners retrieve the data and re-encrypt it under the new access policy, and then send it back to the cloud. This method, however, incurs a high communication overhead and heavy computation burden on data owners. A novel scheme is proposed that enable efficient access control with dynamic policy updating for big data in the cloud. Developing an outsourced policy updating method for ABE systems is focused. This method can avoid the transmission of encrypted data and minimize the computation work of data owners, by making use of the previously encrypted data with old access policies. Policy updating algorithms is proposed for different types of access policies. An efficient and secure method is proposed that allows data owner to check whether the cloud server has updated the ciphertexts correctly. The analysis shows that this policy updating outsourcing scheme is correct, complete, secure and efficient.
This document proposes an attribute-based encryption scheme with verifiable outsourced decryption. Existing attribute-based encryption schemes have expensive decryption costs due to pairing operations. To address this, prior work introduced outsourced decryption using a transformation key, but did not verify the correctness of the transformation. The proposed scheme modifies the model to allow verification and constructs a concrete scheme that proves security without random oracles, while substantially reducing computation time for resource-limited devices to recover plaintexts.
Authentication on Cloud using Attribute Based EncryptionAnkit Raj
Improving Cloud Security for Authentication using Attribute Based Encryption.
Attribute-based encryption is a type of public key encryption in which the secret key of a user and the cipher text are dependent upon attributes. The decryption of a cipher text is possible only if the set of attributes of the user key matches the attributes of the cipher text. A crucial security aspect of Attribute-Based Encryption is collusion-resistance: An adversary that holds multiple keys should only be able to access data if at least one individual key grants access. Cloud computing is a type of Internet-based computing that provides shared computer processing resources and data to computers and other devices on demand. Cloud computing and storage solutions provide users and enterprises with various capabilities to store and process their data in third-party data centers that may be located far from the user–ranging in distance from across a city to across the world. There were several cases of security breach on the cloud in the past few year and data security was compromised like Adobe’s Security Breach, Amazon website failure and many security attacks like this motivated us to work on strict security measures on cloud. In such a system, a user provides an untrusted server, say a cloud service provider, with a transformation key that allows the cloud to translate any ABE cipher text satisfied by that user’s attributes into a simple cipher text, and it only incurs a small computational overhead for the user to recover the plaintext from the transformed cipher text. Security of an ABE system with outsourced decryption ensures that an adversary including a malicious cloud will not be able to learn anything about the encrypted message. The formal model of ABE with outsourced decryption forms a concrete scheme. Data owner decides the access using combinations of or policies and encrypt the file and corresponding authentic user can decrypt it using their policies.
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.co¬m-Visit Our Website: www.finalyearprojects.org
Privacy preserving delegated access control in public cloudAswathy Rajan
This document summarizes a research paper that proposes a new approach called two layer encryption (TLE) to enforce fine-grained access control on confidential data stored in public clouds. The key aspects are:
1) TLE uses two layers of encryption - the data owner performs coarse-grained encryption and the cloud performs fine-grained encryption on top based on access control policies provided by the owner.
2) A challenging problem is how to decompose access control policies for the two layer encryption to work while minimizing what the owner manages and ensuring data confidentiality. The paper shows this is an NP-complete problem.
3) The paper proposes optimization algorithms to find near optimal decompositions and evaluates TLE
An efficient certificateless encryption for data sharing on public cloudAbhijeet Patil
This document summarizes a seminar presentation on an efficient certificate-less encryption for secure data sharing in public clouds. The presentation covers the introduction to cloud computing and encryption/decryption techniques. It discusses the scope of applying mediated certificate-less public key encryption to solve key escrow and revocation problems. The objective is to design an attribute-based encryption scheme that allows encrypted data access based on access policies. The presentation reviews existing algorithms and proposes a pairing-free certificate-less public key cryptography approach. It describes the system architecture and implementation details. The results show the proposed scheme improves efficiency and provides confidentiality of data and keys when using untrusted public clouds.
We propose a mediated certificateless encryption scheme without pairing operations for securely sharing sensitive information in public clouds. Mediated certificateless public key encryption (mCL-PKE) solves the key escrow problem in identity based encryption and certificate revocation problem in public key cryptography.
This document outlines a project to develop and implement an access control mechanism for outsourced data on the cloud. The project has four modules: a supporting application, service development, encryption/decryption, and role-based access. It discusses key terms like access control, access control models, outsourced data, and cloud computing. The system works by allowing a data owner to encrypt and outsource data to the cloud, which then processes and forwards the data to authorized users based on an agreed access policy.
RAAC: Robust and Auditable Access Control with Multiple Attribute Authorities...Prasadu Peddi
This document proposes a robust and auditable access control system with multiple attribute authorities for public cloud storage. It addresses the single point of failure and low efficiency issues of existing ciphertext-policy attribute-based encryption (CP-ABE) schemes that rely on a single attribute authority. The proposed system employs multiple attribute authorities to share the user verification load and introduces a central authority to generate secret keys for legitimate users. It also includes an auditing mechanism to detect any attribute authority that incorrectly performs user verification.
Data get to control is a powerful method to guarantee the data security in the cloud. Because of information
out sourcing and un confided in cloud servers, the information get to control turns into a testing issue in cloud
storage systems. Cipher text-Policy Attribute Based Encryption (CP-ABE) is viewed as a standout amongst
the most reasonable advancements for information get to control in distributed storage, since it gives
straightforward control access to the owners. It is hard to implement the existing CP-ABE schemes to access
the information from cloud storage systems. we propose a plan to structure the information securing control in
a revocable multi-expert CP-ABE conspire from cloud storage system
Audit free cloud storage via deniable attribute based encryptionMano Sriram
1) Cloud storage services have become popular, but user privacy is a concern as data owners do not want unauthorized access. Existing encryption schemes assume cloud providers are trusted, but they could be forced to reveal secrets.
2) The document proposes a new encryption scheme called deniable Ciphertext Policy Attribute Based Encryption (CP-ABE) that allows cloud providers to create fake user secrets, protecting real secrets even if the provider is coerced.
3) By using deniable CP-ABE, cloud providers can convince coercers that obtained secrets are genuine while actually protecting user privacy, addressing a key limitation of prior encryption schemes.
The document proposes a Cloud Information Accountability (CIA) framework to address concerns about lack of control and transparency when data is stored in the cloud. The CIA framework uses a novel logging and auditing technique that automatically logs any access to user data in a decentralized manner. It allows data owners to track how their data is being used according to service agreements or policies. The framework has two major components: a logger that is strongly coupled with user data, and a log harmonizer. The CIA framework aims to provide transparency, enforce access controls, and strengthen user control over their cloud data.
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.co¬m-Visit Our Website: www.finalyearprojects.org
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.co¬m-Visit Our Website: www.finalyearprojects.org
KEY AGGREGATE CRYPTOSYSTEM FOR SCALABLE DATA SHARING IN CLOUDNaseem nisar
1. EASiER proposes an encryption-based access control architecture for social networks that uses attribute-based encryption. It introduces a minimally trusted proxy to enable efficient revocation without reissuing keys.
2. Multi-authority attribute based encryption schemes allow multiple authorities to issue secret keys for attributes. This is useful in applications with attributes managed by different authorities.
3. Existing social network privacy architectures focus on encryption-based access control but do not address efficient revocation of users or attributes. EASiER addresses this issue.
Privacy preserving delegated access control in public cloudsLeMeniz Infotech
Privacy preserving delegated access control in public clouds
Current approaches to enforce fine-grained access control on confidential data hosted in the cloud are based on fine-grained encryption of the data. Under such approaches, data owners are in charge of encrypting the data before uploading them on the cloud and re-encrypting the data whenever user credentials or authorization policies change. Data owners thus incur high communication and computation costs.
Audit free cloud storage via deniable attribute based encryptionKamal Spring
Cloud storage services have become increasingly popular. Because of the importance of privacy, many cloud storage encryption schemes have been proposed to protect data from those who do not have access. All such schemes assumed that cloud storage providers are safe and cannot be hacked; however, in practice, some authorities (i.e., coercers) may force cloud storage providers to reveal user secrets or confidential data on the cloud, thus altogether circumventing storage encryption schemes. In this paper, we present our design for a new cloud storage encryption scheme that enables cloud storage providers to create convincing fake user secrets to protect user privacy. Since coercers cannot tell if obtained secrets are true or not, the cloud storage providers ensure that user privacy is still securely protected. Most of the proposed schemes assume cloud storage service providers or trusted third parties handling key management are trusted and cannot be hacked; however, in practice, some entities may intercept communications between users and cloud storage providers and then compel storage providers to release user secrets by using government power or other means. In this case, encrypted data are assumed to be known and storage providers are requested to release user secrets.
JPJ1407 Expressive, Efficient, and Revocable Data Access Control for Multi-...chennaijp
We are good ieee java projects development center in chennai and pondicherry. We guided advanced java techonolgies projects of cloud computing, data mining, Secure Computing, Networking, Parallel & Distributed Systems, Mobile Computing and Service Computing (Web Service).
For More Details:
http://jpinfotech.org/final-year-ieee-projects/2014-ieee-projects/java-projects/
For further details contact:
N.RAJASEKARAN B.E M.S 9841091117,9840103301.
IMPULSE TECHNOLOGIES,
Old No 251, New No 304,
2nd Floor,
Arcot road ,
Vadapalani ,
Chennai-26.
Hierarchical attribute based solution for flexible access control in cloud co...IJARIIT
Cloud storage enables users to remotely store their data and enjoy the on-demand high quality cloud applications
without the burden of local hardware and software management. Though the benefits are clear, such a service is also
relinquishing users’ physical possession of their outsourced data, which inevitably poses new security risks towards the
correctness of the data in the cloud. In order to address this new problem and further achieve a secure and dependable cloud
storage service, we propose in this paper we develop a new cryptosystem for fine-grained sharing of encrypted data that we call
Key-Policy Attribute-Based Encryption (KP-ABE). In our cryptosystem, ciphertexts are labelled with sets of attributes and private
keys are associated with access structures that control which cipher texts a user is able to decrypt. Attribute-based encryption
(ABE) has been envisioned as a promising cryptographic primitive for realizing secure and flexible access control. HASBE
extends the ASBE algorithm with a hierarchical structure to improve scalability and flexibility while at the same time inherits
the feature of fine-grained access control of ASBE.
In attribute based encryption (ABE) scheme, attributes plays a very important role. Attribute –based encryption provides privacy protection for the users by a set of attributes. Now a days as cloud is most widely used in mostly all fields so there is need of keeping data more secure and confidential which is outsourced on the cloud. Security of the data in cloud database server is the key area of concern in the acceptance of cloud. It is required very high degree of privacy and authentication. In existing system used hierarchical authorization structure to reduce the burden and risk of a single authority .this paper proposes a hierarchical attribute based encryption which directly provides attribute value by user as well as data stored in different types of media.
A Secure & Scalable Access Method in Cloud Computingijsrd.com
This document proposes a new scheme for secure and scalable access control in cloud computing. It extends ciphertext-policy attribute-set based encryption (CP-ASBE) by incorporating a hierarchical structure of system users using a delegation algorithm. The proposed scheme allows a trusted authority and multiple domain authorities to generate keys for data owners and consumers. It defines access structures for encrypting files and issuing user keys with associated attributes. The scheme supports flexible attribute combinations, efficient revocation, and fine-grained access control for outsourced data in cloud computing.
Investigation on Revocable Fine-grained Access Control Scheme for Multi-Autho...IJCERT JOURNAL
Cloud computing is one of the emerge technologies in order to outsource huge volume of data inters of storage and sharing. To protect the data and privacy of users the access control methods ensure that authorized users access the data and the system. Fine grained-approach is the appropriate method for data access control in cloud storage. However, CP-ABE schemes to data access control for cloud storage systems are difficult because of the attribute revocation problem. Specifically, in this paper we investigate on revocable multi-authority Fine-grained-Scheme performance.
Authentication on Cloud using Attribute Based EncryptionAnkit Raj
Improving Cloud Security for Authentication using Attribute Based Encryption.
Attribute-based encryption is a type of public key encryption in which the secret key of a user and the cipher text are dependent upon attributes. The decryption of a cipher text is possible only if the set of attributes of the user key matches the attributes of the cipher text. A crucial security aspect of Attribute-Based Encryption is collusion-resistance: An adversary that holds multiple keys should only be able to access data if at least one individual key grants access. Cloud computing is a type of Internet-based computing that provides shared computer processing resources and data to computers and other devices on demand. Cloud computing and storage solutions provide users and enterprises with various capabilities to store and process their data in third-party data centers that may be located far from the user–ranging in distance from across a city to across the world. There were several cases of security breach on the cloud in the past few year and data security was compromised like Adobe’s Security Breach, Amazon website failure and many security attacks like this motivated us to work on strict security measures on cloud. In such a system, a user provides an untrusted server, say a cloud service provider, with a transformation key that allows the cloud to translate any ABE cipher text satisfied by that user’s attributes into a simple cipher text, and it only incurs a small computational overhead for the user to recover the plaintext from the transformed cipher text. Security of an ABE system with outsourced decryption ensures that an adversary including a malicious cloud will not be able to learn anything about the encrypted message. The formal model of ABE with outsourced decryption forms a concrete scheme. Data owner decides the access using combinations of or policies and encrypt the file and corresponding authentic user can decrypt it using their policies.
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.co¬m-Visit Our Website: www.finalyearprojects.org
Privacy preserving delegated access control in public cloudAswathy Rajan
This document summarizes a research paper that proposes a new approach called two layer encryption (TLE) to enforce fine-grained access control on confidential data stored in public clouds. The key aspects are:
1) TLE uses two layers of encryption - the data owner performs coarse-grained encryption and the cloud performs fine-grained encryption on top based on access control policies provided by the owner.
2) A challenging problem is how to decompose access control policies for the two layer encryption to work while minimizing what the owner manages and ensuring data confidentiality. The paper shows this is an NP-complete problem.
3) The paper proposes optimization algorithms to find near optimal decompositions and evaluates TLE
An efficient certificateless encryption for data sharing on public cloudAbhijeet Patil
This document summarizes a seminar presentation on an efficient certificate-less encryption for secure data sharing in public clouds. The presentation covers the introduction to cloud computing and encryption/decryption techniques. It discusses the scope of applying mediated certificate-less public key encryption to solve key escrow and revocation problems. The objective is to design an attribute-based encryption scheme that allows encrypted data access based on access policies. The presentation reviews existing algorithms and proposes a pairing-free certificate-less public key cryptography approach. It describes the system architecture and implementation details. The results show the proposed scheme improves efficiency and provides confidentiality of data and keys when using untrusted public clouds.
We propose a mediated certificateless encryption scheme without pairing operations for securely sharing sensitive information in public clouds. Mediated certificateless public key encryption (mCL-PKE) solves the key escrow problem in identity based encryption and certificate revocation problem in public key cryptography.
This document outlines a project to develop and implement an access control mechanism for outsourced data on the cloud. The project has four modules: a supporting application, service development, encryption/decryption, and role-based access. It discusses key terms like access control, access control models, outsourced data, and cloud computing. The system works by allowing a data owner to encrypt and outsource data to the cloud, which then processes and forwards the data to authorized users based on an agreed access policy.
RAAC: Robust and Auditable Access Control with Multiple Attribute Authorities...Prasadu Peddi
This document proposes a robust and auditable access control system with multiple attribute authorities for public cloud storage. It addresses the single point of failure and low efficiency issues of existing ciphertext-policy attribute-based encryption (CP-ABE) schemes that rely on a single attribute authority. The proposed system employs multiple attribute authorities to share the user verification load and introduces a central authority to generate secret keys for legitimate users. It also includes an auditing mechanism to detect any attribute authority that incorrectly performs user verification.
Data get to control is a powerful method to guarantee the data security in the cloud. Because of information
out sourcing and un confided in cloud servers, the information get to control turns into a testing issue in cloud
storage systems. Cipher text-Policy Attribute Based Encryption (CP-ABE) is viewed as a standout amongst
the most reasonable advancements for information get to control in distributed storage, since it gives
straightforward control access to the owners. It is hard to implement the existing CP-ABE schemes to access
the information from cloud storage systems. we propose a plan to structure the information securing control in
a revocable multi-expert CP-ABE conspire from cloud storage system
Audit free cloud storage via deniable attribute based encryptionMano Sriram
1) Cloud storage services have become popular, but user privacy is a concern as data owners do not want unauthorized access. Existing encryption schemes assume cloud providers are trusted, but they could be forced to reveal secrets.
2) The document proposes a new encryption scheme called deniable Ciphertext Policy Attribute Based Encryption (CP-ABE) that allows cloud providers to create fake user secrets, protecting real secrets even if the provider is coerced.
3) By using deniable CP-ABE, cloud providers can convince coercers that obtained secrets are genuine while actually protecting user privacy, addressing a key limitation of prior encryption schemes.
The document proposes a Cloud Information Accountability (CIA) framework to address concerns about lack of control and transparency when data is stored in the cloud. The CIA framework uses a novel logging and auditing technique that automatically logs any access to user data in a decentralized manner. It allows data owners to track how their data is being used according to service agreements or policies. The framework has two major components: a logger that is strongly coupled with user data, and a log harmonizer. The CIA framework aims to provide transparency, enforce access controls, and strengthen user control over their cloud data.
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.co¬m-Visit Our Website: www.finalyearprojects.org
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.co¬m-Visit Our Website: www.finalyearprojects.org
KEY AGGREGATE CRYPTOSYSTEM FOR SCALABLE DATA SHARING IN CLOUDNaseem nisar
1. EASiER proposes an encryption-based access control architecture for social networks that uses attribute-based encryption. It introduces a minimally trusted proxy to enable efficient revocation without reissuing keys.
2. Multi-authority attribute based encryption schemes allow multiple authorities to issue secret keys for attributes. This is useful in applications with attributes managed by different authorities.
3. Existing social network privacy architectures focus on encryption-based access control but do not address efficient revocation of users or attributes. EASiER addresses this issue.
Privacy preserving delegated access control in public cloudsLeMeniz Infotech
Privacy preserving delegated access control in public clouds
Current approaches to enforce fine-grained access control on confidential data hosted in the cloud are based on fine-grained encryption of the data. Under such approaches, data owners are in charge of encrypting the data before uploading them on the cloud and re-encrypting the data whenever user credentials or authorization policies change. Data owners thus incur high communication and computation costs.
Audit free cloud storage via deniable attribute based encryptionKamal Spring
Cloud storage services have become increasingly popular. Because of the importance of privacy, many cloud storage encryption schemes have been proposed to protect data from those who do not have access. All such schemes assumed that cloud storage providers are safe and cannot be hacked; however, in practice, some authorities (i.e., coercers) may force cloud storage providers to reveal user secrets or confidential data on the cloud, thus altogether circumventing storage encryption schemes. In this paper, we present our design for a new cloud storage encryption scheme that enables cloud storage providers to create convincing fake user secrets to protect user privacy. Since coercers cannot tell if obtained secrets are true or not, the cloud storage providers ensure that user privacy is still securely protected. Most of the proposed schemes assume cloud storage service providers or trusted third parties handling key management are trusted and cannot be hacked; however, in practice, some entities may intercept communications between users and cloud storage providers and then compel storage providers to release user secrets by using government power or other means. In this case, encrypted data are assumed to be known and storage providers are requested to release user secrets.
JPJ1407 Expressive, Efficient, and Revocable Data Access Control for Multi-...chennaijp
We are good ieee java projects development center in chennai and pondicherry. We guided advanced java techonolgies projects of cloud computing, data mining, Secure Computing, Networking, Parallel & Distributed Systems, Mobile Computing and Service Computing (Web Service).
For More Details:
http://jpinfotech.org/final-year-ieee-projects/2014-ieee-projects/java-projects/
For further details contact:
N.RAJASEKARAN B.E M.S 9841091117,9840103301.
IMPULSE TECHNOLOGIES,
Old No 251, New No 304,
2nd Floor,
Arcot road ,
Vadapalani ,
Chennai-26.
Hierarchical attribute based solution for flexible access control in cloud co...IJARIIT
Cloud storage enables users to remotely store their data and enjoy the on-demand high quality cloud applications
without the burden of local hardware and software management. Though the benefits are clear, such a service is also
relinquishing users’ physical possession of their outsourced data, which inevitably poses new security risks towards the
correctness of the data in the cloud. In order to address this new problem and further achieve a secure and dependable cloud
storage service, we propose in this paper we develop a new cryptosystem for fine-grained sharing of encrypted data that we call
Key-Policy Attribute-Based Encryption (KP-ABE). In our cryptosystem, ciphertexts are labelled with sets of attributes and private
keys are associated with access structures that control which cipher texts a user is able to decrypt. Attribute-based encryption
(ABE) has been envisioned as a promising cryptographic primitive for realizing secure and flexible access control. HASBE
extends the ASBE algorithm with a hierarchical structure to improve scalability and flexibility while at the same time inherits
the feature of fine-grained access control of ASBE.
In attribute based encryption (ABE) scheme, attributes plays a very important role. Attribute –based encryption provides privacy protection for the users by a set of attributes. Now a days as cloud is most widely used in mostly all fields so there is need of keeping data more secure and confidential which is outsourced on the cloud. Security of the data in cloud database server is the key area of concern in the acceptance of cloud. It is required very high degree of privacy and authentication. In existing system used hierarchical authorization structure to reduce the burden and risk of a single authority .this paper proposes a hierarchical attribute based encryption which directly provides attribute value by user as well as data stored in different types of media.
A Secure & Scalable Access Method in Cloud Computingijsrd.com
This document proposes a new scheme for secure and scalable access control in cloud computing. It extends ciphertext-policy attribute-set based encryption (CP-ASBE) by incorporating a hierarchical structure of system users using a delegation algorithm. The proposed scheme allows a trusted authority and multiple domain authorities to generate keys for data owners and consumers. It defines access structures for encrypting files and issuing user keys with associated attributes. The scheme supports flexible attribute combinations, efficient revocation, and fine-grained access control for outsourced data in cloud computing.
Investigation on Revocable Fine-grained Access Control Scheme for Multi-Autho...IJCERT JOURNAL
Cloud computing is one of the emerge technologies in order to outsource huge volume of data inters of storage and sharing. To protect the data and privacy of users the access control methods ensure that authorized users access the data and the system. Fine grained-approach is the appropriate method for data access control in cloud storage. However, CP-ABE schemes to data access control for cloud storage systems are difficult because of the attribute revocation problem. Specifically, in this paper we investigate on revocable multi-authority Fine-grained-Scheme performance.
Secure and-verifiable-policy-update-outsourcing-for-big-data-access-control-i...Kamal Spring
Due to the high volume and velocity of big data, it is an effective option to store big data in the cloud, as the cloud has capabilities of storing big data and processing high volume of user access requests. Attribute-Based Encryption (ABE) is a promising technique to ensure the end-to-end security of big data in the cloud. However, the policy updating has always been a challenging issue when ABE is used to construct access control schemes. A trivial implementation is to let data owners retrieve the data and re-encrypt it under the new access policy, and then send it back to the cloud. This method, however, incurs a high communication overhead and heavy computation burden on data owners. A novel scheme is proposed that enable efficient access control with dynamic policy updating for big data in the cloud. Developing an outsourced policy updating method for ABE systems is focused. This method can avoid the transmission of encrypted data and minimize the computation work of data owners, by making use of the previously encrypted data with old access policies. Policy updating algorithms is proposed for different types of access policies. An efficient and secure method is proposed that allows data owner to check whether the cloud server has updated the ciphertexts correctly. The analysis shows that this policy updating outsourcing scheme is correct, complete, secure and efficient.
The document proposes a Session Based Ciphertext Policy Attribute Based Encryption (SB-CP-ABE) method for access control in cloud storage. SB-CP-ABE aims to enable efficient key refreshing and revocation in ciphertext policy attribute based encryption (CP-ABE) schemes. It introduces the concept of associating private keys with sessions, so that key updates and revocations only need to be done at session boundaries, avoiding the need for frequent re-encryption of ciphertexts. The method can be generically applied to existing CP-ABE schemes to improve their practicality for cloud storage environments.
Cloud Computing Environment using Secured Access Control TechniqueIRJET Journal
This document proposes a new technique called Storage Correctness and Small-grained Access Provision (SCSAP) for secure cloud computing environments. SCSAP aims to improve on existing access control techniques by providing more fine-grained user access and ensuring correctness of outsourced cloud data storage through a token granting system. The technique constructs hierarchical user access formations and includes algorithmic phases for small-grained data access and efficient storage. If implemented, SCSAP could provide stronger security, access control and data integrity than prior cloud storage solutions.
A Personal Privacy Data Protection Scheme for Encryption and Revocation of Hi...Shakas Technologies
A Personal Privacy Data Protection Scheme for Encryption and Revocation of High-Dimensional Attri
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Providing user security guarantees in public infrastructure cloudsKamal Spring
The infrastructure cloud (IaaS) service model offers improved resource flexibility and availability, where tenants – insulated from the minutiae of hardware maintenance – rent computing resources to deploy and operate complex systems. Large-scale services running on IaaS platforms demonstrate the viability of this model; nevertheless, many organizations operating on sensitive data avoid migrating operations to IaaS platforms due to security concerns. In this paper, we describe a framework for data and operation security in IaaS, consisting of protocols for a trusted launch of virtual machines and domain-based storage protection. We continue with an extensive theoretical analysis with proofs about protocol resistance against attacks in the defined threat model. The protocols allow trust to be established by remotely attesting host platform configuration prior to launching guest virtual machines and ensure confidentiality of data in remote storage, with encryption keys maintained outside of the IaaS domain. Presented experimental results demonstrate the validity and efficiency of the proposed protocols. The framework prototype was implemented on a test bed operating a public electronic health record system, showing that the proposed protocols can be integrated into existing cloud environments.
A Secure, Scalable, Flexible and Fine-Grained Access Control Using Hierarchic...Editor IJCATR
Cloud Computing is going to be very popular technology in IT enterprises. For any enterprise the data stored is very huge
and invaluable. Since all tasks are performed through network it has become vital to have the secured use of legitimate data. In cloud
computing the most important matter of concern are data security and privacy along with flexibility, scalability and fine grained access
control of data being the other requirements to be maintained by cloud systems Access control is one of the prominent research topics
and hence various schemes have been proposed and implemented. But most of them do not provide flexibility, scalability and fine
grained access control of the data on the cloud. In order to address the issues of flexibility, scalability and fine grained access control
of remotely stored data on cloud we have proposed the hierarchical attribute set-based encryption (HASBE) which is the extension of
attribute- set-based encryption(ASBE) with a hierarchical structure of users. The proposed scheme achieves scalability by handling the
authority to appropriate entity in the hierarchical structure, inherits flexibility by allowing easy transfer and access to the data in case
of location switch. It provides fine grained access control of data by showing only the requested and authorized details to the user thus
improving the performance of the system. In addition, it provides efficient user revocation within expiration time, request to view
extra-attributes and privacy in the intra-level hierarchy is achieved. Thus the scheme is implemented to show that is efficient in access
control of data as well as security of data stored on cloud with comprehensive experiments
IRJET- Data Centric Access Control Solution with Role baesd Proxy Re-EncryptionIRJET Journal
This document discusses data-centric access control solutions for cloud computing. It proposes a solution called SecRBAC that uses identity-based encryption and proxy re-encryption techniques to protect data stored in the cloud from the cloud service provider. The key aspects of SecRBAC are that data is doubly encrypted before being stored in the cloud. Also, a role-based access control approach is used to assign privileges to users to access encrypted data from the cloud.
JAVA 2013 IEEE CLOUDCOMPUTING PROJECT Attribute based encryption with verifia...IEEEGLOBALSOFTTECHNOLOGIES
This document summarizes an academic paper that proposes an attribute-based encryption scheme with verifiable outsourced decryption. Existing schemes offload decryption to an untrusted server but do not verify the correctness of the transformation. The proposed scheme modifies the security model to allow for verification and constructs a concrete ABE system where a user can efficiently check that the server performed the decryption transformation correctly, without relying on random oracles. The scheme substantially reduces the computation required for decryption on resource-limited devices.
Attribute based encryption with verifiable outsourced decryptionIEEEFINALYEARPROJECTS
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.co¬m-Visit Our Website: www.finalyearprojects.org
Enhanced Hybrid Blowfish and ECC Encryption to Secure cloud Data Access and S...JobandeepKaur2
This is the paper basically on the security of data in the cloud. Who to use various access policies and apply encryption and decryption on data stored in a cloud.
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.com-Visit Our Website: www.finalyearprojects.org
A robust and verifiable threshold multi authority access control system in pu...IJARIIT
Attribute-based Encryption is observed as a promising cryptographic leading tool to assurance data owners’ direct
regulator over their data in public cloud storage. The former ABE schemes include only one authority to maintain the whole
attribute set, which can carry a single-point bottleneck on both security and performance. Then, certain multi-authority
schemes are planned, in which numerous authorities distinctly maintain split attribute subsets. However, the single-point
bottleneck problem remains unsolved. In this survey paper, from another perspective, we conduct a threshold multi-authority
CP-ABE access control scheme for public cloud storage, named TMACS, in which multiple authorities jointly manage a
uniform attribute set. In TMACS, taking advantage of (t, n) threshold secret allocation, the master key can be shared among
multiple authorities, and a lawful user can generate his/her secret key by interacting with any t authorities. Security and
performance analysis results show that TMACS is not only verifiable secure when less than t authorities are compromised, but
also robust when no less than t authorities are alive in the system. Also, by efficiently combining the traditional multi-authority
scheme with TMACS, we construct a hybrid one, which satisfies the scenario of attributes coming from different authorities as
well as achieving security and system-level robustness.
This document discusses using disruption tolerant network (DTN) technology to enable secure communication in military networks that experience intermittent connectivity. It proposes using ciphertext-policy attribute-based encryption (CP-ABE) to manage access to encrypted information in a DTN where attributes are managed by multiple independent authorities. The key challenges addressed are flexible access policies across attributes from different authorities, efficient revocation of user attributes, and preventing key escrow issues. The proposed approach allows an access policy to be expressed using attributes from any set of authorities and supports efficient revocation of user attributes without rekeying the entire private key. It analyzes the efficiency and security of the approach compared to previous multi-authority CP-ABE schemes.
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expressive, efficient, and revocable data access control for multi authority cloud storage
1. Expressive, Efficient, and Revocable Data Access Control for Multi Authority Cloud Storage
Expressive, Efficient, and Revocable Data Access Control for Multi
Authority Cloud Storage
Data access control is an effective way to ensure the data security in the cloud. Due to data
outsourcing and untrusted cloud servers, the data access control becomes a challenging issue in
cloud storage systems. Ciphertext-Policy Attributebased Encryption (CP-ABE) is regarded as
one of the most suitable technologies for data access control in cloud storage, because it gives
data owners more direct control on access policies. However, it is difficult to directly apply
existing CP-ABE schemes to data access control for cloud storage systems because of the
attribute revocation problem. In this paper, we design an expressive, efficient and revocable data
access control scheme for multi-authority cloud storage systems, where there are multiple
authorities co-exist and each authority is able to issue attributes independently. Specifically, we
propose a revocable multi-authority CP-ABE scheme, and apply it as the underlying techniques
to design the data access control scheme. Our attribute revocation method can efficiently achieve
both forward security and backward security. The analysis and simulation results show that our
proposed data access control scheme is secure in the random oracle model and is more efficient
than previous works.
This new paradigm of data hosting and data access services introduces a great challenge to
dataaccess control. Because the cloud server cannot be fully trusted by data owners, they can no
longer rely on servers to do access control. Ciphertext-Policy Attribute-based Encryption (CP-ABE)
is regarded as one of the most suitabletechnologies for data access control in cloud storage
systems,because it gives the data owner more direct control on access policies. In CP-ABE
scheme, there is an authority that is responsible for attribute management and key distribution.
DISADVANTAGES OF EXISTING SYSTEM:
Chase’s multi-authority CP-ABE protocol allows the central authority to decrypt
allthe ciphertexts, since it holds the master key of the system.
Contact: 9703109334, 9533694296
ABSTRACT:
EXISTING SYSTEM:
Email id: academicliveprojects@gmail.com, www.logicsystems.org.in
2. Expressive, Efficient, and Revocable Data Access Control for Multi Authority Cloud Storage
Chase’s protocol does not support sattribute revocation.
In this paper, we first propose a revocable multiauthority CP-ABE scheme, where an efficient
and secure revocation method is proposed to solve the attribute revocation problem in the
system. Our attribute revocation method is efficient in the sense that it incurs less
communication cost and computation cost, and is secure in the sense that it can achieve both
backward security (The revoked user cannot decrypt any new ciphertext that requires the
revoked attribute to decrypt)and forward security (The newly joined user can also decrypt the
previously published ciphertexts1, if it has sufficient.attributes). Our scheme does not require the
server to be fully trusted, because the key update is enforced by each attribute authority not the
server. Even if the server is not semitrusted in some scenarios, our scheme can still guarantee the
backward security. Then, we apply our proposed revocable multi-authority CP-ABE scheme as
the underlying techniques to construct the expressive and secure data access control scheme for
multi-authority cloud storage systems.
ADVANTAGES OF PROPOSED SYSTEM:
We modify the framework of the scheme and make it more practical to cloud storage
systems, in which data owners are not involved in the key generation.
We greatly improve the efficiency of the attribute revocation method.
We also highly improve the expressiveness of our access control scheme, where we
remove the limitation that each attribute can only appear at most once in a ciphertext.
Contact: 9703109334, 9533694296
PROPOSED SYSTEM:
Email id: academicliveprojects@gmail.com, www.logicsystems.org.in
3. Expressive, Efficient, and Revocable Data Access Control for Multi Authority Cloud Storage
SYSTEM ARCHITECTURE:
SYSTEM REQUIREMENTS:
HARDWARE REQUIREMENTS:
System : Pentium IV 2.4 GHz.
Hard Disk : 40 GB.
Floppy Drive : 1.44 Mb.
Monitor : 15 VGA Colour.
Mouse : Logitech.
Ram : 512 Mb.
Contact: 9703109334, 9533694296
Email id: academicliveprojects@gmail.com, www.logicsystems.org.in
4. Expressive, Efficient, and Revocable Data Access Control for Multi Authority Cloud Storage
SOFTWARE REQUIREMENTS:
Operating system : Windows XP/7.
Coding Language : JAVA/J2EE
IDE : Netbeans 7.4
Database : MYSQL
Kan Yang, Student Member, IEEE, and Xiaohua Jia, Fellow, IEEE“Expressive, Efficient, and
Revocable Data Access Control for Multi-Authority Cloud Storage” IEEE
TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS,VOL. 25,NO. 7,JULY
2014.
Contact: 9703109334, 9533694296
REFERENCE:
Email id: academicliveprojects@gmail.com, www.logicsystems.org.in