AES Algorithm using 512 Bit Key Implemented for Secure Communication

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A.Chandra Sekar
S. Radhika


The main aim of this paper is to provide stronger security for communication over the Internet by enhancing the strength of the AES
algorithm. Rijndael’s algorithm was selected as the Advanced Encryption Standard. The AES algorithm was believed to provide much more
security without any limitations. But, recently some breaking methods on the AES have been found by cryptanalysts. In AES algorithm, the
number of rounds involved in the encryption and decryption depends on the length of the key and the number of block columns. So, the number
of rounds is increased to improve the strength of the AES. The strength of the AES algorithm is enhanced by increasing the key length to 512 bit
and thereby the number of rounds is increased in order to provide a stronger encryption method for secure communication. Code optimization is
done in order to improve the speed of encryption and decryption using the 512 bit AES.

Keywords: Cryptography, Encryption, Java implementation, Decryption, AES algorithm


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