Research On The Algorithm Of Advanced Encryption

As many kinds of commercial and social businesses are transformed into electronic form and are conducted on the network, all kinds of cryptographic algorithms used can insure security of these activities. The Advanced Encryption Standard, which is selected by NIST, has an elegant algebraic structure, and is a good symmetry cryptosystem with its advantages of simplicity, high efficiency and security. And Elliptic Curve Cryptography (ECC) systems, is characterized by higher safety property, faster speed, shorter key lengths and fewer computational resources for implementation than other former traditional public-key algorithms.This paper studies its round transformation equation, and gives a better implementation of AES based on table-looking-up method, proposes its optimized algorithm, which can greatly increase the encrypting/decrypting speed. And proposes the mixed cryptosystem based on the combination of the AES and Elliptic Curve Cryptography, which will actualize encrypt of data, digital signature and identification with high efficiency in Internet communication, and solve the problem of antinomy of speed and security in cryptosystem.