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Cryptography encapsulation

NADAR SARASWATHI COLLEGE OF ARTS AND
SCIENCE
DEPARTMENT OF COMPUTER SCIENCE
CRYPTOGRAPHY
Encapsulation security payroll
internet key exchange
presented by
M.Shakthi msc cs

ENCAPSULATION SECURITY
In software systems, encapsulation refers to the bundling of data with the
mechanisms or methods that operate on the data. It may also refer to the limiting of
direct access to some of that data, such as an object's components.
In general, encapsulation is a process of wrapping similar code in one place. In
C++, we can bundle data members and functions that operate together inside a
single class. For example, class Rectangle { public: int length; int breadth; int
getArea() { return length * breadth; } };

3 BASIC TECHNIQUES:
• There are three basic techniques to encapsulate data in Object
Programming.
•
Types of Encapsulation in OOPs
• Member Variable Encapsulation. ...
• Function Encapsulation. ...
• Class Encapsulation.

Advantages of Encapsulation
Encapsulation protects an object from unwanted access by clients.
Encapsulation allows access to a level without revealing the complex details
below that level. It reduces human errors. Simplifies the maintenance of the
application.

Disadvantages of Encapsulation
Code Size:
The length of the code increases drastically in the case of encapsulation
as we need to provide all the methods with the specifiers. More Instructions:
As the size of the code increases, therefore, you need to provide additional
instructions for every method.

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Security is a main issue for adoption of cloud computing. NFV and SDN can be used to efficiently coordinate different network security functionality in the network. To squeeze the best out of network capabilities, there is a need for algorithms for optimal placement of the security functionality in the cloud infrastructure. Classical placement algorithms are not scalable due to the large number of flows to be considered and complexity of interactions in these networks. To address the issue, this paper presents an optimization framework, namely OCDO, that provides adequate and scalable network security provisioning and deployment in the cloud. Also described is a prototype implementation of the framework integrated into an open source cloud framework, i.e. Open stack. Full abstract in IEEE Xplore, DOI:10.1109/CLOUD.2015.82 Authors Yosr Jarraya and Makan Pourzandi, Ericsson Research,;Alireza Shameli-Sendi, McGill University; Mohamed Cheriet, University of Quebec Published 2015-06-27 © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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Cloud computing is becoming prominent trend which offers the number of significant advantages. One of the ground laying advantage of the cloud computing is the pay-as-per-use, where according to the use of the services, the customer has to pay. At present, user’s storage availability improves the data generation. There is requiring farming out such large amount of data. There is indefinite large number of Cloud Service Providers (CSP). The Cloud Service Providers is increasing trend for many number of organizations and as well as for the customers that decreases the burden of the maintenance and local data storage. In cloud computing transferring data to the third party administrator control will give rise to security concerns. Within the cloud, compromisation of data may occur due to attacks by the unauthorized users and nodes. So, in order to protect the data in cloud the higher security measures are required and also to provide security for the optimization of the data retrieval time. The proposed system will approach the issues of security and performance. Initially in the DROPS methodology, the division of the files into fragments is done and replication of those fragmented data over the cloud node is performed. Single fragment of particular file can be stored on each of the nodes which ensure that no meaningful information is shown to an attacker on a successful attack. The separation of the nodes is done by T-Coloring in order to prohibit an attacker to guess the fragment’s location. The complete data security is ensured by DROPS methodology

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it describes the main concepts of object oriented programming For more posts : http://comsciguide.blogspot.com/ For full playlist of Interview puzzles videos : https://www.youtube.com/playlist?list=PL3v9ipJOEEPfI4zt4ExamGJwndkvg0SFc 24 standard interview puzzles: https://www.youtube.com/playlist?list=PL3v9ipJOEEPefIF4nscYOobim1iRBJTjw Aptitude training playlist link : https://www.youtube.com/playlist?list=PL3v9ipJOEEPfumKHa02HWjCfPvGQiPZiG for C and C++ questions, that are asked in the interviews, go through the posts in the link : http://comsciguide.blogspot.com/ for more videos, my youtube channel : https://www.youtube.com/channel/UCvMy2V7gYW7VR2WgyvLj3-A

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Encryption is the most important concept to enhance the security in cloud access policies. Encryption data in the cloud is the procedure of transforming or encrypted data or information before it’s moved to cloud storage. Normally, in cloud service sources give encrypted services ranging from an encoding connection to limited encode sensitive information and provide encode key to decode the data as required.Several security problems and some of their solution are examined and are concentrating primarily in public security problems and their solutions. In this paper, we’ve implemented a hybrid approach, where access policies won’t leak any privacy data and to enhance the security and performance parameters like decryption time, encryption time and accuracy and compared with existing performance parameters.Security is the main limitation while storing data over cloud server. The introduced approach is implemented appropriately even if the tenant could access the information all that would appear is gabble., Hijacking of sessions while accessing data, insider threats, outsider malicious attacks, data loss, loss of control, and service disruption. Therefore enhancing the security for multimedia data storage in a cloud center is of paramount importance.

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AIRCC Publishing Corporation

Cloud Computing is the revolution in current generation IT enterprise. Cloud computing displaces database and application software to the large data centres, where the management of services and data may not be predictable, where as the conventional solutions, for IT services are under proper logical, physical and personal controls. This aspect attribute, however comprises different security challenges which have not been well understood. It concentrates on cloud data storage security which has always been an important aspect of quality of service (QOS). In this paper, we designed and simulated an adaptable and efficient scheme to guarantee the correctness of user data stored in the cloud and also with some prominent features. Homomorphic token is used for distributed verification of erasure – coded data. By using this scheme, we can identify misbehaving servers. In spite of past works, our scheme supports effective and secure dynamic operations on data blocks such as data insertion, deletion and modification. In contrast to traditional solutions, where the IT services are under proper physical, logical and personnel controls, cloud computing moves the application software and databases to the large data centres, where the data management and services may not be absolutely truthful. This effective security and performance analysis describes that the proposed scheme is extremely flexible against malicious data modification, convoluted failures and server clouding attacks.

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Cloud computing is a distributed environment that encompasses thousands of computers that work in parallel to perform a task in lesser time than the traditional computing models. This parallelism enables the low cost virtualization of hardware resources with increased computational performances. Cloud computing provides tremendous opportunity for small and medium scale enterprises to grow their business using IT services with zero deployment cost. Whenever, a task is distributed over web, there encounters a series of potential threats that challenges the security of data such as buffer overflow, session hijacking and black hole attacks. A cloud computing based services also face such kinds of security issues where applications deployed on cloud can face same kind of attacks as that on client server model. Storage as a Service SaaS based applications are vulnerable to virus attacks .Online operating systems are available on cloud to the user for free .Viruses can spread as attachments of email, of part of the software or can stay in Master Boot Record MBR of the operating system available on cloud. Worms residing on one system in cloud can migrate to another system on its own. Trojan horse is software with wrong intentions. Thus the present system needs an effective mechanism to address the problem encountered in cloud computing. R. Dhiviya | K. Mohamed Amanullah "Enhanced Cloud Security Implementation using Modified ECC Algorithm" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd27870.pdfPaper URL: https://www.ijtsrd.com/engineering/computer-engineering/27870/enhanced-cloud-security-implementation-using-modified-ecc-algorithm/r-dhiviya

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Context. WASP-76 b has been a recurrent subject of study since the detection of a signature in high-resolution transit spectroscopy data indicating an asymmetry between the two limbs of the planet. The existence of this asymmetric signature has been confirmed by multiple studies, but its physical origin is still under debate. In addition, it contrasts with the absence of asymmetry reported in the infrared (IR) phase curve. Aims. We provide a more comprehensive dataset of WASP-76 b with the goal of drawing a complete view of the physical processes at work in this atmosphere. In particular, we attempt to reconcile visible high-resolution transit spectroscopy data and IR broadband phase curves. Methods. We gathered 3 phase curves, 20 occultations, and 6 transits for WASP-76 b in the visible with the CHEOPS space telescope. We also report the analysis of three unpublished sectors observed by the TESS space telescope (also in the visible), which represents 34 phase curves. Results. WASP-76 b displays an occultation of 260±11 and 152±10 ppm in TESS and CHEOPS bandpasses respectively. Depending on the composition assumed for the atmosphere and the data reduction used for the IR data, we derived geometric albedo estimates that range from 0.05 ± 0.023 to 0.146 ± 0.013 and from <0.13 to 0.189 ± 0.017 in the CHEOPS and TESS bandpasses, respectively. As expected from the IR phase curves, a low-order model of the phase curves does not yield any detectable asymmetry in the visible either. However, an empirical model allowing for sharper phase curve variations offers a hint of a flux excess before the occultation, with an amplitude of ∼40 ppm, an orbital offset of ∼−30◦ , and a width of ∼20◦ . We also constrained the orbital eccentricity of WASP-76 b to a value lower than 0.0067, with a 99.7% confidence level. This result contradicts earlier proposed scenarios aimed at explaining the asymmetry observed in high-resolution transit spectroscopy. Conclusions. In light of these findings, we hypothesise that WASP-76 b could have night-side clouds that extend predominantly towards its eastern limb. At this limb, the clouds would be associated with spherical droplets or spherically shaped aerosols of an unknown species, which would be responsible for a glory effect in the visible phase curves.

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We explore different scenarios to explain the chemical difference found in the remarkable giant-giant binary system HD138202+CD−3012303. For the first time, we suggest how to distinguish these scenarios by taking advantage of the extensive convective envelopes of giant stars. Methods. We carried out a high-precision determination of stellar parameters and abundances by applying a full line-by-line differential analysis on GHOST high-resolution spectra. We used the FUNDPAR program with ATLAS12 model atmospheres and specific opacities calculated for an arbitrary composition through a doubly iterated method. Physical parameters were estimated with the isochrones package and evolutionary tracks were calculated via MIST models. Results. We found a significant chemical difference between the two stars (∆[Fe/H]∼0.08dex), which is largely unexpected considering the insensitivity of giant stars to planetary ingestion and diffusion effects. We tested the possibility of engulfment events by using several different combinations of stellar mass, ingested mass, metallicity of the engulfed object and different convective envelopes. However, the planetary ingestion scenario does not seem to explain the observed differences. For the first time, we distinguished the source of chemical differences using a giant-giant binary system. By ruling out other possible scenarios such as planet formation and evolutionary effects between the two stars, we suggest that primordial inhomogeneities might explain the observed differences. This remarkable result implies that the metallicity differences that were observed in at least some main-sequence binary systems might be related to primordial inhomogeneities rather than engulfment events. We also discuss the important implications of finding primordial inhomogeneities, which affect chemical tagging and other fields such as planet formation. We strongly encourage the use of giantgiant pairs. They are a relevant complement to main-sequence pairs for determining the origin of the observed chemical differences in multiple systems.

Disentangling the origin of chemical differences using GHOST

Disentangling the origin of chemical differences using GHOST

Disentangling the origin of chemical differences using GHOST

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