关键词: AES算法, ECB模式, IECB模式, 尾端处理, 分类处理

Abstract: The operation mode of block cipher algorithm is of vital importance for information security．In this paper, IECB:an improved data stream encryption and decryption implementation of AES algorithm,IECB is presented to encrypt\decrypt data stream and proved to be able to enhance the data storage security. Trial disposing is presented to satisfy block cipher and will achieve the optimal with space and time consumption by classification disposing according to different document sizes. Finally a comparison of the performance between IECB and ECB through experiment is made and it demonstrates that IECB mode can work steadily and obtain correct and reliable result.

Key words: AES algorithm, ECB mode, IECB mode, trail processing, classification processing