Enhancing File Storage Security in Cloud Computing using Hybrid Cryptographic Algorithm

Cloud computing is an information technology paradigm which is used in different areas like military, educational purposes, IT industry to store vast amount of data daily. Uploading data, downloading data, exchange of information are some of the basic characteristics of Cloud Computing. But there are certain challenges and issues which need to be resolved for providing efficient access to user’s data. Sometimes use of single algorithm in Cloud Computing is not sufficient to provide high level security, so use of multiple algorithms results in more secured platform. In this proposed system AES, blowfish and RC4 algorithms are used to provide block wise security to data. All algorithm key size is 128 bit. Steganography technique is introduced for key information security. Key information contains which part of file is encrypted using by which algorithm and key. All the three algorithms simultaneously work on to encrypt in Hybrid way. Reverse of the same above process is applied to decrypt the file.