Performance Analysis of Cipher Block Chaining Message Authentication Code (CBC MAC) and its Variants
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Department of Computer Science and I.T.
Abstract
The cryptographic algorithms employed in internet security must be able to handle packets which may vary in size over a large range. Most of the cryptographic algorithms process messages by partitioning them into large blocks. Due to this fact the messages have to be prepared by padding the required amount of zero bits to get an integer number of blocks. This process contributes a considerable overhead when the short messages are more dominant in the message stream.Herein this thesis,analyses is focused on the performance of different message authentication code generator algorithm based on cipher block.These all variants of cipher based must have to share symmetric key before creating message authentication code.All variants of CBCMA Care implemented in JAVA.The result of empirical performance shows that two variants namely TMAC perform better for AES Encryption algorithm in larger size other wise EMAC show the better result with the Triple DES symmetric algorithm. The result shows that,when consider only on the performance aspect. Cycle/byte is calculated for comparing different variants of CBC MAC. Cycle/byte is decreased when input size of message is increased.Advanced Encryption Standard (AES) algorithm shows good performance than TDES and it has better security features than DES. CBC-MAC is likely to be standardized as an AES mode of
operation.