Secure File Storage on Cloud Using Cryptography

Abstract

Abstract: Hacking became a serious drawback lately. Transference of secure knowledge or communication through the web turns out to be difficult because of security considerations. to anticipate these security hurdles, we tend to use Cryptography, and Image Steganography. Day’s cloud computing is currently employed in several areas like business, colleges, and Universities to store a great amount of knowledge. We will extract knowledge from the cloud for the asking of users. To store knowledge on the cloud we've to face several errors and issues. Cryptography and steganography techniques area unit well-liked currently a day’s for knowledge security. using one algorithmic rule isn't effective for prime-level security to knowledge in cloud computing. during this paper, we initiated a new security mechanism using symmetrical key cryptography algorithmic rules and steganography. during this projected system AES, blowfish, RC6, and 3DES algorithms area units were used to supply blockwise security to knowledge. All algorithms have a key size of 128 bits. Key data contains that a part of the file is encrypted using that algorithmic rule and key. The file is split into eight components. every part of the file is encrypted using different algorithmic rules. All components of the file area unit are encrypted at the same time with the assistance of the multithreading technique. encoding Keys area unit inserted into cowl image using LSB technique. Steganography image is sent to a valid receiver using email. For file secret writing purposes reverse method of cryptography is applied. Keywords-Hacking, Steganography, Cryptography, Cloud service provider (CSP), cloud server (CS), Encode, Decode, Delay, Integrity