Enhancing Security by Implementing Image based Encryption in Cloud Environment

In the realm of specialized life distributed computing has ended up basic part furthermore understanding the method for business is changing and is liable to keep changing into what's to come. Utilizing distributed storage administrations implies that you and others can get to and share documents over a scope of gadgets and position. Records, for example, photographs and recordings can some of the time be unmanageable to email in the event that they are too huge or you have apportion of information. You can transfer your information to a distributed storage supplier implies you can expediently flow your information with the assistance of cloud administration and you can impart your information records to anybody you pick. Since distributed computing offers circulated assets by means of system in the open environment in this manner it makes less secured. Information security has turned into a noteworthy issue in information sharing on cloud. The primary aphorism behind our framework is that it secures the information and creates the key for every exchange so every client can secure our common information by the outsider i.e. dishonest programmer. Individual information put away in the Cloud may contain account numbers, passwords, notes, and other imperative data that could be utilized and abused by a scalawag, a contender, or an official courtroom. These information are stored, replicated, and documented by Cloud Service Providers, regularly without client's approval and control. The framework proposed comprise of the key era rationale for cloud server which helps irregular key era security for ABS. What's more, our framework secures the information and produces the key for every exchange by utilizing property based mar

Data hiding in multimedia - theory and applications

Multimedia data hiding or steganography is a means of communication using subliminal channels. The resource for the subliminal communication scheme is the distortion of the original content that can be tolerated. This thesis addresses two main issues of steganographic communication schemes: 1. How does one maximize the distortion introduced without affecting fidelity of the content? 2. How does one efficiently utilize the resource (the distortion introduced) for communicating as many bits of information as possible? In other words, what is a good signaling strategy for the subliminal communication scheme? Close to optimal solutions for both issues are analyzed. Many techniques for the issue for maximizing the resource, viz, the distortion introduced imperceptibly in images and video frames, are proposed. Different signaling strategies for steganographic communication are explored, and a novel signaling technique employing a floating signal constellation is proposed. Algorithms for optimal choices of the parameters of the signaling technique are presented. Other application specific issues like the type of robustness needed are taken into consideration along with the established theoretical background to design optimal data hiding schemes. In particular, two very important applications of data hiding are addressed - data hiding for multimedia content delivery, and data hiding for watermarking (for proving ownership). A robust watermarking protocol for unambiguous resolution of ownership is proposed

Overview of blockchain technology cryptographic security

This thesis work is aimed at developing understanding of the hash functions and algorithms being used in blockchain technologies Bitcoin in comparison to Ethereum and private blockchain hash functions. This study attempts to answer one fundamental research question: “What considerations are important in assessing blockchain cryptographic security, with an emphasis on hash functions”. The study was carried out qualitatively using a desk research approach and combining this approach with using two public blockchains-based cryptocurrencies; Ethereum and Bitcoin as case studies. The research aims to provide a holistic view of blockchain cryptographic security comparing Bitcoin and Ethereum as use cases, and thus providing a consolidated document which students studying cryptography can access to obtain a better understanding of what is involved in blockchain security. From an academic perspective, the research aims at providing a model which can be used in assessing what is important to consider in the cryptographic security of blockchains. Three main categories of factors considered were presented in the proposed model which were strategical factors, complexity attributes and technical drivers. This results in a base crucial metrics such as absence of secret seeds, efficiency of verification, preimage collision resistance, fixed output size, low collision probability, and even distribution of preimages in output

Attribute Based Encryption with Verifiable Time Stamped Decryption

Numerous applications require expanded insurance of private information including access control strategies that are cryptographically authorized. A promising utilization of ABE is adaptable get to control of scrambled information put away in the cloud, utilizing access polices and credited traits related with private keys and ciphertexts. Productivity disadvantages of the current ABE plans is that unscrambling includes costly matching operations and the quantity of such operations develops with the intricacy of the get to approach. The public key generation relying upon the properties of the predetermined content to be encrypted, that will create numerous keys to be utilized to scramble or unscramble the information. Extra private key to be included is the server time stamping with the encryption key to guarantee that the data should not be recovered after particular timeframe. The accompanying paper is depicting a strategies showing how to apply those technique safely and effectively to manage secret data circulated over capacity organize. Security and execution examination demonstrates the proposed plans are provably secure and exceptionally effective