The Application Research Of Encryption Technology Base On AES

Domestic bank card solution, mainly through contact or a non-contact type IC card of this tangible physical media to carry out transactions, such tangible physical media, there are a lot of shortcomings: inconvenient to carry, easy to lose, easy to damage; Result when the need for users to go to specialized banking institutions, huge waste of human and material resources; and its encryption algorithm is generally DES (Data Encryption Standard), encryption strength and low computational speed is very slow, Therefore, from the perspective of practical significance to study the AES encryption algorithm is very useful.This article describes the significance of AES encryption algorithm, the development process, mathematical theory and in practical application; on the practical application of the encryption algorithm's unreasonable demands, this paper, the S box, line shift, the number of columns mixed, the sum of round keys The transformation to a new design, from the practical application, from key distribution, differential Cryptanalysis, brute force attack and other aspects were analyzed and improved the algorithm by replacing the bytes carried out major improvements, and ultimately the bank card meter is not reliable, secure communication channel.Finally, this paper-based AES security and benefits analysis, and by limiting the daily consumption of the user input the number of times the number of ciphertext to solve the shortcomings of the traditional DES. The algorithm in theory, practical applications to meet the security needs.