The document discusses secure data sharing in cloud storage using a key-aggregate cryptosystem (KAC) which allows efficient delegation of decryption rights for any set of ciphertexts. KAC produces constant size ciphertexts and allows any set of secret keys to be aggregated into a single key encompassing the power of the keys being aggregated. This aggregate key can then be sent to others for decryption of the ciphertext set while keeping files outside the set confidential.
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
A Review Paper on Secure authentication and data sharing in cloud storage usi...ijsrd.com
Cryptography is the study of mathematical techniques related to aspects of information security such as confidentiality, data integrity, entity authentication and data again authentication. We describe new public-key cryptosystems that produce constant-size cipher texts such that efficient delegation of decryption rights for any set of cipher texts is possible. Cryptosystem or cryptographic system is any sort of methodology for encoding and accessing that information. In this technique the master key holder can release a constant-size aggregate key for flexible choices of cipher text set in cloud storage, but the other encrypted files outside the set remain confidential. This compact aggregate key can be conveniently sent to others or be stored in a smart card with very limited secure storage. We provide formal security analysis of our schemes in the standard model. We also describe other application of our schemes. In particular, one can aggregate any set of secret keys and make them compact as a single key but encompassing the power of all the keys being aggregated.
Cryptography is a process used for sending information in secret way. Goal of this process is to provide protection for information but in different way. In this paper our motive to represent a new method for protection that is generated by combination of RSA and 2 bit rotation mechanism of cryptography. There are many algorithms exist for this process. For cryptography there are algorithms like RSA, IDEA, AES, and DES but here we are using only one algorithm from these that is RSA which is enough to implement combined process using 2 bit rotation. The encrypted image is used as input for network for further implementation.RSA encrypt image with 1 bit rotation. In 1 bit rotation only 1 bit is shifted and at decrypt side shifted bit are reversed. But to make it more secure we are going to perform 2 bit rotation due to which it is more secure as compared to existing algorithm. After applying the 2 bit rotation we perform the permutation of that image that will give us encrypted image. Shivam Kumar | Dr. Ganesh D "Image Cryptography using RSA Algorithm" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd42408.pdf Paper URL: https://www.ijtsrd.comcomputer-science/computer-security/42408/image-cryptography-using-rsa-algorithm/shivam-kumar
Key aggregate searchable encryption (kase) for group data sharing via cloud s...LeMeniz Infotech
Key aggregate searchable encryption (kase) for group data sharing via cloud storage
Do Your Projects With Technology Experts
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
A Review Paper on Secure authentication and data sharing in cloud storage usi...ijsrd.com
Cryptography is the study of mathematical techniques related to aspects of information security such as confidentiality, data integrity, entity authentication and data again authentication. We describe new public-key cryptosystems that produce constant-size cipher texts such that efficient delegation of decryption rights for any set of cipher texts is possible. Cryptosystem or cryptographic system is any sort of methodology for encoding and accessing that information. In this technique the master key holder can release a constant-size aggregate key for flexible choices of cipher text set in cloud storage, but the other encrypted files outside the set remain confidential. This compact aggregate key can be conveniently sent to others or be stored in a smart card with very limited secure storage. We provide formal security analysis of our schemes in the standard model. We also describe other application of our schemes. In particular, one can aggregate any set of secret keys and make them compact as a single key but encompassing the power of all the keys being aggregated.
Cryptography is a process used for sending information in secret way. Goal of this process is to provide protection for information but in different way. In this paper our motive to represent a new method for protection that is generated by combination of RSA and 2 bit rotation mechanism of cryptography. There are many algorithms exist for this process. For cryptography there are algorithms like RSA, IDEA, AES, and DES but here we are using only one algorithm from these that is RSA which is enough to implement combined process using 2 bit rotation. The encrypted image is used as input for network for further implementation.RSA encrypt image with 1 bit rotation. In 1 bit rotation only 1 bit is shifted and at decrypt side shifted bit are reversed. But to make it more secure we are going to perform 2 bit rotation due to which it is more secure as compared to existing algorithm. After applying the 2 bit rotation we perform the permutation of that image that will give us encrypted image. Shivam Kumar | Dr. Ganesh D "Image Cryptography using RSA Algorithm" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd42408.pdf Paper URL: https://www.ijtsrd.comcomputer-science/computer-security/42408/image-cryptography-using-rsa-algorithm/shivam-kumar
Key aggregate searchable encryption (kase) for group data sharing via cloud s...LeMeniz Infotech
Key aggregate searchable encryption (kase) for group data sharing via cloud storage
Do Your Projects With Technology Experts
To Get this projects Call : 9566355386 / 99625 88976
Visit : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
RSA and RC4 Cryptosystem Performance Evaluation Using Image and TextYekini Nureni
The process of transforming plaintext data into cipher text in order to conceal its meaning in case it fall to hand of unauthorized recipient is refers to as encryption. The systems that perform the encryption processes are known as cryptosystems, there are several cryptosystem algorithms: RSA, RC4, DES, 3DES, Blowfish, AES, IDEA, Skipjack, DSA, ElGamal, etc. The major features that identify and differentiate one cryptosystem algorithm from another are its ability to secure the protected data against attacks and its speed/efficiency. In this paper: application software was designed to implement RSA, and RCA encryption algorithms with advanced features of visual Basic 6 for the front end interface. Microsoft Access is used to design backend of the application, and the Macromedia Flash was also used to incorporate dynamic features that enhance the appearance of the application. The program was used to compare the performance of RSA and RC4. The encryption operation was carried out for both RSA and RC4 using five text files and five graphic files of different sizes 10, 50, 100, 150, and 200 kilobyte respectively. The major factor considered for measuring the performance of the algorithms (RSA and RC4) is the speed of execution using time of execution (TE) as parameter for the evaluation. The performance result was presented and analyzed. We discovered that the RC4 is better compare to RSA algorithm based on the experimental facts presented and the result analysis of the two evaluated algorithms.
Security analysis of fbdk block cipher for digital imageseSAT Journals
Abstract Network security is one of the major concerns in the modern world. In this regard, a strong security technique is required to protect user data. Cryptography techniques plays an important role in secured transmission through encryption of data and thus ensuring integrity, authenticity, confidentiality of information. Several encryption algorithms have been proposed like AES (Advanced Encryption Standard), DES (Data Encryption Standard) and RSA. These provide very good encryption for text applications. However, these encryption schemes appear not to be ideal for image applications. Some algorithms like GKSBC and RC6 provide very good encryption for digital images. New techniques are emerging that are aimed at providing secured transmission of images over networks. The FBDK (Fixed Block with Dynamic Key Size) block cipher is a new cryptography technique designed using simple operations like XOR, substitutions, circular shifting. The FBDK algorithm is applicable for blocks of any size with key size being dynamic for each block. It does not involve any complex mathematical operations like modular exponentiation. It is a hybrid cryptography technique based on symmetric key and asymmetric key cryptosystems. This paper investigates the security of FBDK block cipher for digital images against brute-force attack, statistical analysis and Differential analysis attacks. In this paper, various security analysis tests has been discussed which are helpful in finding out whether the FBDK encryption algorithm can do secure encryption or not. Experimental results proves the security and efficiency of FBDK cipher for images against all aforementioned types of attacks which justifies its consideration for real time image applications. Keywords: Cryptography, Ciphers, Encryption, Security, and cryptanalysis.
Attribute Based Encryption with Privacy Preserving In Clouds Swathi Rampur
This is a ppt made by shrihari ,in this encryption with privacy preserving in clouds is described!
It will be helpfull for those who are doing projects on cloud!
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
Mobile Ad hoc Network is a collection of wireless mobile nodes forming a network without
using any existing infrastructure. MANET is a collection of mobile nodes along with wireless
transmitter and receiver that with each other via a bi-directional links either directly or indirectly. A
new intrusion detection system named communicates Enhanced Adaptive Acknowledgment
(EAACK) specially designed for MANETs. It is based on the digital signature algorithm (DSA). To
enhance the security in the mobile adhoc networks, we introduce a new approach called Hybrid
cryptography algorithm that provides integrity, confidentiality and authentication. This hybrid
cryptography algorithm is based on two cryptography algorithms such as RSA and AES. Encryption is
achieved by using, RSA algorithm for authentication and symmetric algorithm for the integrity. By
using the symmetric and asymmetric cryptographic algorithm, we can achieve better security and
integrity than the EAACK
«Изучение некоторых особенностей поведения журавля серого на территории посёлка Балакирево», Тюменкова Анастасия.Руководитель:Горева Елена Вячеславовна, МБОУ ООШ № 37 п. Балакиревообъединение "Юный эколог"
Without users & their problems, we have no reason to write software. However, sometimes, it is frustrating dealing with the source of our problems. Thankfully, there are tools to help us become better at communicating with our end users, in hopes of achieving the end goal with as little strife as possible. Empathy, patience, and clear communication go a long way in development, as this talk will show. “Even More Tools for the Developer’s UX Toolbelt” will give developers even more tools to make their lives a little easier when dealing with end users.
RSA and RC4 Cryptosystem Performance Evaluation Using Image and TextYekini Nureni
The process of transforming plaintext data into cipher text in order to conceal its meaning in case it fall to hand of unauthorized recipient is refers to as encryption. The systems that perform the encryption processes are known as cryptosystems, there are several cryptosystem algorithms: RSA, RC4, DES, 3DES, Blowfish, AES, IDEA, Skipjack, DSA, ElGamal, etc. The major features that identify and differentiate one cryptosystem algorithm from another are its ability to secure the protected data against attacks and its speed/efficiency. In this paper: application software was designed to implement RSA, and RCA encryption algorithms with advanced features of visual Basic 6 for the front end interface. Microsoft Access is used to design backend of the application, and the Macromedia Flash was also used to incorporate dynamic features that enhance the appearance of the application. The program was used to compare the performance of RSA and RC4. The encryption operation was carried out for both RSA and RC4 using five text files and five graphic files of different sizes 10, 50, 100, 150, and 200 kilobyte respectively. The major factor considered for measuring the performance of the algorithms (RSA and RC4) is the speed of execution using time of execution (TE) as parameter for the evaluation. The performance result was presented and analyzed. We discovered that the RC4 is better compare to RSA algorithm based on the experimental facts presented and the result analysis of the two evaluated algorithms.
Security analysis of fbdk block cipher for digital imageseSAT Journals
Abstract Network security is one of the major concerns in the modern world. In this regard, a strong security technique is required to protect user data. Cryptography techniques plays an important role in secured transmission through encryption of data and thus ensuring integrity, authenticity, confidentiality of information. Several encryption algorithms have been proposed like AES (Advanced Encryption Standard), DES (Data Encryption Standard) and RSA. These provide very good encryption for text applications. However, these encryption schemes appear not to be ideal for image applications. Some algorithms like GKSBC and RC6 provide very good encryption for digital images. New techniques are emerging that are aimed at providing secured transmission of images over networks. The FBDK (Fixed Block with Dynamic Key Size) block cipher is a new cryptography technique designed using simple operations like XOR, substitutions, circular shifting. The FBDK algorithm is applicable for blocks of any size with key size being dynamic for each block. It does not involve any complex mathematical operations like modular exponentiation. It is a hybrid cryptography technique based on symmetric key and asymmetric key cryptosystems. This paper investigates the security of FBDK block cipher for digital images against brute-force attack, statistical analysis and Differential analysis attacks. In this paper, various security analysis tests has been discussed which are helpful in finding out whether the FBDK encryption algorithm can do secure encryption or not. Experimental results proves the security and efficiency of FBDK cipher for images against all aforementioned types of attacks which justifies its consideration for real time image applications. Keywords: Cryptography, Ciphers, Encryption, Security, and cryptanalysis.
Attribute Based Encryption with Privacy Preserving In Clouds Swathi Rampur
This is a ppt made by shrihari ,in this encryption with privacy preserving in clouds is described!
It will be helpfull for those who are doing projects on cloud!
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
Mobile Ad hoc Network is a collection of wireless mobile nodes forming a network without
using any existing infrastructure. MANET is a collection of mobile nodes along with wireless
transmitter and receiver that with each other via a bi-directional links either directly or indirectly. A
new intrusion detection system named communicates Enhanced Adaptive Acknowledgment
(EAACK) specially designed for MANETs. It is based on the digital signature algorithm (DSA). To
enhance the security in the mobile adhoc networks, we introduce a new approach called Hybrid
cryptography algorithm that provides integrity, confidentiality and authentication. This hybrid
cryptography algorithm is based on two cryptography algorithms such as RSA and AES. Encryption is
achieved by using, RSA algorithm for authentication and symmetric algorithm for the integrity. By
using the symmetric and asymmetric cryptographic algorithm, we can achieve better security and
integrity than the EAACK
«Изучение некоторых особенностей поведения журавля серого на территории посёлка Балакирево», Тюменкова Анастасия.Руководитель:Горева Елена Вячеславовна, МБОУ ООШ № 37 п. Балакиревообъединение "Юный эколог"
Without users & their problems, we have no reason to write software. However, sometimes, it is frustrating dealing with the source of our problems. Thankfully, there are tools to help us become better at communicating with our end users, in hopes of achieving the end goal with as little strife as possible. Empathy, patience, and clear communication go a long way in development, as this talk will show. “Even More Tools for the Developer’s UX Toolbelt” will give developers even more tools to make their lives a little easier when dealing with end users.
«Vladimir regionin the history of the Great Patriotic War: the song writer Alexey Fatyanov», Силаева Валентина, Позднякова Ирина, Гаврилова Анастасия , Петрова Виктория Руководитель: Зуева Лилия Юрьевна, МБОУ СОШ №1 с углубленным изучением отдельных предметов.
«Изучение жизнедеятельности улитки виноградной в домашних условиях», Бобылева Мария Руководитель:Горева Елена Вячеславовна МБОУ ДОД АРДДТ п. Балакирево, объединение "Юный эколог"
Особенности размножения и развития потомства улитки ахатины в домашних условиях
Пантелеев Сергей. Руководитель: Колымагина Тамара Владимировна, МБОУ СОШ №1 с углубленным изучением отдельных предметов
Hybrid Cryptography security in public cloud using TwoFish and ECC algorithmIJECEIAES
Cloud computing is a structure for rendering service to the user for free or paid basis through internet facility where we can access to a bulk of shared resources which results in saving managing cost and time for large companies, The data which are stored in the data center may incur various security, damage and threat issues which may result in data leakage, insecure interface and inside attacks. This paper will demonstrate the implementation of hybrid cryptography security in public cloud by a combination of Elliptical Curve Cryptography and Twofish algorithm, which provides an innovative solution to enhance the security features of the cloud so that we can improve the service thus results in increasing the trust over the technology.
A Review on Key-Aggregate Cryptosystem for Climbable Knowledge Sharing in Clo...Editor IJCATR
The Data sharing is an important functionality in cloud storage. In this article, we show how to securely, efficiently, and
flexibly share data with others in cloud storage. We describe new public-key cryptosystems which produce constant-size ciphertexts
such that efficient delegation of decryption rights for any set of ciphertexts are possible. The novelty is that one can aggregate any set
of secret keys and make them as compact as a single key, but encompassing the power of all the keys being aggregated. In other
words, the secret key holder can release a constant-size aggregate key for flexible choices of ciphertext set in cloud storage, but the
other encrypted files outside the set remain confidential. This compact aggregate key can be conveniently sent to others or be stored in
a smart card with very limited secure storage. We provide formal security analysis of our schemes in the standard model. We also
describe other application of our schemes. In particular, our schemes give the first public-key patient controlled encryption for flexible
hierarchy, which was yet to be known.
Key-Aggregate Searchable Encryption (KASE) for Group Data Sharing via Cloud S...1crore projects
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Key aggregate searchable encryption (kase) for group data sharing via cloud s...CloudTechnologies
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Analysis of Cryptographic Algorithms for Network SecurityEditor IJCATR
Cryptography plays a major role in securing data. It is used to ensure that the contents of a message are confidentially
transmitted and would not be altered. Network security is most vital component in information security as it refers to all hardware and
software function, characteristics, features, operational procedures, accountability, access control, and administrative and management
policy. Cryptography is central to IT security challenges, since it underpins privacy, confidentiality and identity, which together
provide the fundamentals for trusted e-commerce and secure communication. There is a broad range of cryptographic algorithms that
are used for securing networks and presently continuous researches on the new cryptographic algorithms are going on for evolving
more advanced techniques for secures communication.
Secure Data Sharing and Search in Cloud Based Data Using Authoritywise Dynami...IOSRjournaljce
The Data sharing is an important functionality in cloud storage. We describe new public key crypto systems which produce constant-size cipher texts such that efficient delegation of decryption rights for any set of cipher texts are possible. The novelty is that one can aggregate any set of secret keys and make them as compact as a single key, but encompassing the power of all the keys being aggregated. Ensuring the security of cloud computing is second major factor and dealing with because of service availability failure the single cloud providers demonstrated less famous failure and possibility malicious insiders in the single cloud. A movement towards Multi-Clouds, In other words ”Inter-Clouds” or ”Cloud-Of-Clouds” as emerged recently. This works aim to reduce security risk and better flexibility and efficiency to the user. Multi-cloud environment has ability to reduce the security risks as well as it can ensure the security and reliability.
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online
Prevention of Cheating Message based on Block Cipher using Digital Envelopeiosrjce
IOSR Journal of Computer Engineering (IOSR-JCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of computer engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in computer technology. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Different date block size using to evaluate the performance between different...IJCNCJournal
The different computer networks whether wired or wireless are becoming more popular with its high
security aspect. Different security algorithms and technique are using to avoid any aforementioned attacks.
One of these technique is a cryptography technique that makes the data as unreadable during the transfer
hence; there is no chance to reclaim the information. Presently, most of the users are using various media
types and internet to transfer the data but, it has the chance to retrieve the data by using these media types.
The perfect solution for this problem is to provide security on time-to-time basis; this stage is always
significant to the security related community discussions. This paper explains the comparison between the
run time of three different encryption algorithms which are DES, AES and Blowfish The compression
includes using different modes, data block size and different operation modes. As a result, Blowfish
algorithm followed by AES take less time for running compared to DES.
SECURE CLOUD STORAGE USING DENIABLE ATTRIBUTE BASED ENCRYPTIONadeij1
Cloud storage services are a lot of well-liked today . To secure information from those that don't have access, several encoding schemes are projected. Most of the projected schemes assume cloud storage service suppliers or trustworthy third parties handling key management are trustworthy and can't be hacked; but, in follow, some entities could intercept communications between users and cloud storage suppliers and so compel storage suppliers to unleash user secrets by victimisation government power or alternative means that. During this case, encrypted information are assumed to be identified and storage suppliers are requested to unleash user secrets. Since it's tough to fight against outside coercion, we tend to aimed to create Associate in Nursing encoding theme that might facilitate cloud storage suppliers avoid this plight. We provide cloud storage suppliers means that to make pretend user secrets. Given such pretend user secrets, outside coercers will solely obtained solid information from a user’s keep cipher text. Once coercers suppose the received secrets are real, they'll be happy and a lot of significantly cloud storage suppliers won't have discovered any real secrets. Therefore, user privacy continues to be protected.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
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Assuring Contact Center Experiences for Your Customers With ThousandEyes
ijircee_Template
1. ISSN(Online): 0946-xxxx
International Journal of Innovative Research in Computer
and Electronics Engineering
Vol. 1, Issue 3, March 2015
Copyright to IJIRCEE www.ijircee.com 34
Secure Data sharing in cloud storage with
key-Aggregate Cryptosystem
Nagarajan. G 1
, Methelin Daisy Bharathi. J2
, Gnanasekar. V3
M.Tech (IT) Student, Department of IT, PSV College of Engg & Tech, Krishnagiri, TN.India1
Assistant Professor, Department of ECE, Mahendra Engg collage for Women, Tiruchengode, TN,India2
Assistant Professor, Department of IT, PSV College of Engg & Tech, Krishnagiri, TN, India3
Abstract— Cloud storage is a storage of data online in cloud which is accessible from multiple and connected
resources. Cloud storage can provide good accessibility and reliability, strong protection, disaster recovery, and
lowest cost. Cloud storage having important functionality i.e. securely, efficiently, flexibly sharing data with others.
New public–key encryption which is called as Key- aggregate cryptosystem (KAC) is introduced. Key-aggregate
cryptosystem produce constant size cipher texts such that efficient delegation of decryption rights for any set of cipher
text are possible. Any set of secret keys can be aggregated and make them as single key, which encompasses power of
all the keys being aggregated. This aggregate key can be sent to the others for decryption of cipher text set and
remaining encrypted files outside the set are remains confidential.
KEYWORDS — Cloud storage, Key-aggregate cryptosystem (KAC), Cipher text, Encryption, Decryption, secret key
I.INTRODUCTION
Cloud storage is nowadays very popular storage system. Cloud storage is storing of data off-site to the
physical storage which is maintained by third party. Cloud storage is saving of digital data in logical pool and
physical storage spans multiple servers which are manage by third party. Third party is responsible for keeping
data available and accessible and physical environment should be protected and running at all time. Instead of
storing data to the hard drive or any other local storage, we save data to remote storage which is accessible from
anywhere and anytime. It reduces efforts of carrying physical storage to everywhere. By using cloud storage we
can access information from any computer through internet which omitted limitation of accessing information from
same computer where it is stored.
While considering data privacy, we cannot rely on traditional technique of authentication, because
unexpected privilege escalation will expose all data. Solution is to encrypt data before uploading to the server with
user’s own key. Data sharing is again important functionality of cloud storage, because user can share data from
anywhere and anytime to anyone. For example, organization may grant permission to access part of sensitive data
to their employees. But challenging task is that how to share encrypted data. Traditional way is user can download
the encrypted data from storage, decrypt that data and send it to share with others, but it loses the importance of
cloud storage.
Cryptography technique can be applied in a two major ways- one is symmetric key encryption and other is
asymmetric key encryption. In symmetric key encryption, same keys are used for encryption and decryption.
By contrast, in asymmetric key encryption different keys are used, public key for encryption and private key for
decryption. Using asymmetric key encryption is more flexible for our approach. This can be illustrated by following
example.
Suppose Alice put all data on Box.com and she does not want to expose her data to everyone. Due to data
leakage possibilities she does not trust on privacy mechanism provided by Box.com, so she encrypt all data before
uploading to the server. If Bob ask her to share some data then Alice use share function of Box.com. But problem
now is that how to share encrypted data. There are two severe ways: 1. Alice encrypt data with single secret key and
share that secret key directly with the Bob. 2. Alice can encrypt data with distinct keys and send Bob corresponding
keys to Bob via secure channel. In first approach, unwanted data also get expose to the Bob, which is inadequate. In
2. ISSN(Online): 0946-xxxx
International Journal of Innovative Research in Computer
and Electronics Engineering
Vol. 1, Issue 3, March 2015
Copyright to IJIRCEE www.ijircee.com 35
second approach, no. of keys is as many as no. of shared files, which may be hundred or thousand as well as
transferring these keys require secure channel and storage space which can be expensive.
II. RELATED WORK
SYMMETRIC-KEY ENCRYPTION WITH COMPACT KEY
Benaloh et al. [2] presented an encryption scheme which is originally proposed for concisely transmitting
large number of keys in broadcast scenario [3]. The construction is simple and we briefly review its key derivation
process here for a concrete description of what are the desirable properties we want to achieve. The derivation of the
key for a set of classes (which is a subset of all possible ciphertext classes) is as follows. A composite modulus is
chosen where p and q are two large random primes. A master secret key is chosen at random. Each class is associated
with a distinct prime. All these prime numbers can be put in the public system parameter. A constant-size key for set
can be generated. For those who have been delegated the access rights for Sˈ can be generated. However, it is
designed for the symmetric-key setting instead. The content provider needs to get the corresponding secret keys to
encrypt data, which is not suitable for many applications. Because method is used to generate a secret value rather
than a pair of public/secret keys, it is unclear how to apply this idea for public-key encryption scheme. Finally, we
note that there are schemes which try to reduce the key size for achieving authentication in symmetric-key encryption,
e.g., [4]. However, sharing of decryption power is not a concern in these schemes.
IBE WITH COMPACT KEY
Identity-based encryption (IBE) (e.g., [5], [6], [7]) is a public-key encryption in which the public-key of
a user can be set as an identity-string of the user (e.g., an email address, mobile number). There is a private key
generator (PKG) in IBE which holds a master-secret key and issues a secret key to each user with respect to the user
identity. The content provider can take the public parameter and a user identity to encrypt a message. The recipient
can decrypt this ciphertext by his secret key. Guo et al. [8], [9] tried to build IBE with key aggregation. In their
schemes, key aggregation is constrained in the sense that all keys to be aggregated must come from different ―identity
divisions‖. While there are an exponential number of identities and thus secret keys, only a polynomial number of
them can be aggregated.[1] This significantly increases the costs of storing and transmitting ciphertexts,
which is impractical in many situations such as shared cloud storage. As Another way to do this is to apply hash
function to the string denoting the class, and keep hashing repeatedly until a prime is obtained as the output of the
hash function.[1] we mentioned, our schemes feature constant ciphertext size, and their security holds in the standard
model. In fuzzy IBE [10], one single compact secret key can decrypt ciphertexts encrypted under many identities
which are close in a certain metric space, but not for an arbitrary set of identities and therefore it does not match with
our idea of key aggregation.
ATTRIBUTE-BASED ENCRYPTION
Attribute-based encryption (ABE) [11], [12] allows each ciphertext to be associated with an attribute, and the
master-secret key holder can extract a secret key for a policy of these attributes so that a ciphertext can be decrypted
by this key if its associated attribute conforms to the policy. For example, with the secret key for the policy (1 ˅ 3 ˅ 6
˅ 8), one can decrypt ciphertext tagged with class 1, 3, 6 or 8. However, the major concern in ABE is collusion-
resistance but not the compactness of secret keys. Indeed, the size of the key often increases linearly with the number
of attributes it encompasses, or the ciphertext-size is not constant (e.g., [13]).
Therefore best solution to above problem is Alice encrypts data with distinct public keys, but send single
decryption key of constant size to Bob. Since the decryption key should be sent via secure channel and kept secret
small size is always enviable. To design an efficient public-key encryption scheme which supports flexible
delegation in the sense that any subset of the cipher texts.
3. ISSN(Online): 0946-xxxx
International Journal of Innovative Research in Computer
and Electronics Engineering
Vol. 1, Issue 3, March 2015
Copyright to IJIRCEE www.ijircee.com 36
Different Schemes Ciphertext size Decryption key size Encryption type
Key assignment schemes Constant Non-constant Symmetric or public-key
Symmetric-key
encryption with compact
key
Constant Constant Symmetric key
IBE with compact key Non-constant Constant Public key
Attribute based
encryption
Constant Non-constant Public key
KAC Constant Constant Public key
III. PROPOSED WORK
The data owner establishes the public system parameter through Setup and generates a public/master-
secret key pair through KeyGen. Data can be encrypted via Encrypt by anyone who also decides what cipher text
class is associated with the plaintext message to be encrypted. The data owner can use the master-secret key pair to
generate an aggregate decryption key for a set of cipher text classes through Extract. The generated keys can be
passed to delegate securely through secure e-mails or secure devices Finally, any user with an aggregate key can
decrypt any cipher text provided that the cipher text’s class is contained in the aggregate key via Decrypt. Key
aggregate encryption schemes consist of five polynomial time algorithms as follows:
1. Setup (1λ , n) : The data owner establish public system parameter via Setup. On input of a security
level parameter 1λ and number of ciphertext classes n , it outputs the public system parameter param
2. KeyGen: It is executed by data owner to randomly generate a public/ master-secret key pair (Pk, msk).
3. Encrypt (pk, i, m) : It is executed by data owner and for message m and index i.
4. Extract (msk, S): It is executed by data owner for delegating the decrypting power for a certain set k.
5. Decrypt (Ks, S, I, C): It is executed by a delegate who received, an aggregate key Ks generated by
S, an index i denoting the ciphertext class ciphertext C belongs to and output is decrypted result m.
A canonical application of KAC is data sharing. The key aggregation property is especially useful when we
expect delegation to be efficient and flexible. The KAC schemes enable a content provider to share her data in a
confidential and selective way, with a fixed and small ciphertext expansion, by distributing to each authorized user a
single and small aggregate key.
Data sharing in cloud storage using KAC, illustrated in Figure 1. Suppose Alice wants to share her data
m1,m2,....,mn on the server. She first performs Setup (1λ, n) to get param and execute KeyGen to get the
public/master-secret key pair (pk, msk). The system parameter param and public-key pk can be made public and
master-secret key msk should be kept secret by Alice. Anyone can then encrypt each mi by Ci = Encrypt (pk, i, mi).
4. ISSN(Online): 0946-xxxx
International Journal of Innovative Research in Computer
and Electronics Engineering
Vol. 1, Issue 3, March 2015
Copyright to IJIRCEE www.ijircee.com 37
Network
Storage
Aggregate Key
K2,3,5
1 2 3 4
Encrypt(Pk,i,
5 6 7
Setup-> param
KeyGen->Pk,mk
Extract(mk,{2,3,5})->K2,3,5
Figure. 1. Using KAC for data sharing in cloud storage.
The encrypted data are uploaded to the server. With param and pk, people who cooperate with Alice can
update Alice’s data on the server. Once Alice is willing to share a set S of her data with a friend Bob, she can
compute the aggregate key KS for Bob by performing Extract (msk, S). Since KS is just a constant size key, it is easy
to be sent to Bob through a secure e-mail. After obtaining the aggregate key, Bob can download the data he is
authorized to access. That is, for each i ϵ S, Bob downloads Ci from the server. With the aggregate key KS, Bob can
decrypt each Ci by Decrypt (KS, S, i, Ci) for each i ϵ S.
IV. CONCLUSION AND FUTURE WORK
Users data privacy is a central question of cloud storage. Compress secret keys in public-key
cryptosystems which support delegation of secret keys for different cipher text classes in cloud storage. No matter
which one among the power set of classes, the delegate can always get an aggregate key of constant size. In cloud
storage, the number of cipher texts usually grows rapidly without any restrictions. So we have to reserve enough
cipher text classes for the future extension. Otherwise, we need to expand the public-key. Although the parameter
can be downloaded with cipher texts, it would be better if its size is independent of the maximum number of cipher
text classes.
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and Electronics Engineering
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Copyright to IJIRCEE www.ijircee.com 38
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