SECURE FILE STORAGE IN CLOUD COMPUTING USING HYBRID CRYPTOGRAPHY ALGORITHM
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Abstract
Now a day’s cloud computing is used in many areas like industry, military colleges etc to storing huge amount of data. We can retrieve data from cloud on request of user. To store data on cloud we have to face many issues. To provide the solution to these issues there are n number of ways. Cryptography and steganography techniques are more popular now a day’s for data security. Use of a single algorithm is not effective for high level security to data in cloud computing. In this paper we have introduced new security mechanism using symmetric key cryptography algorithm and steganography. In this proposed system AES, blowfish, RC6 and BRA algorithms are used to provide block wise security to data. All algorithm key size is 128 bit.LSB steganography technique is introduced for key information security. Key information contains which part of file is encrypted using by which algorithm and key .File is splited into eight parts. Each and every part of file is encrypted using different algorithm. All parts of file are encrypted simultaneously with the help of multithreading technique. Data encryption Keys are inserted into cover image using LSB technique. Stego image is send to valid receiver using email .For file decryption purpose reverse process of encryption is applied. Cloud security is defensive method to protect data and there are various method to protect data like Deterrent controls, Preventive controls , corrective controls and detective controls. Wih concern of security we should keep some points in mind like privacy , confidentiality, integrity and so on .And our novel research based on this.
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