Description

Now a day’s data sharing through social network is a difficult in concern with security. The data transfer from one node to another through network should be more efficient and secured. There are various mechanism proposed to avoid secure issues in the network transmission of data. The Cooperative Key based Authentication Scheme provides security for data transmission in social network. The data transmitted from one end user is first encrypted using the Rijindeal Algorithm and DES encryption algorithm. The data then transmitted to the other end user is received first and decrypted for two times to retrieve the data. We also provide check ability on the results returned from the OSNs service provider to guarantee the correctness of partial decrypted cipher text. Moreover, our scheme presents an efficient attribute revocation method that achieves both forward and backward secrecy. The security and performance analysis results indicate that the proposed scheme is secure and efficient in OSNs. . They encrypt and decrypt each 128-bit block separately. If the plaintext contains identical 128-byte blocks, as many text files do, the blocks will be encrypted identically. This makes some of the plaintext structure visible in the ciphertext, even to someone who does not have the key.