Abstract
In terms of the problem that the encryption rate of International Data Encryption Algorithm (IDEA) is low, and it’s throughout capacity is small under the ECB packet mode, this paper proposes a kind of improved IDEA-ECB based on multithread technology. Change the order flow of single thread into concurrent flow of multithread with clocking plaintext and multithread technology, which improve the encryption rate and throughout capacity, at the same time reduce the operation hours of encryption algorithm, and satisfy the demand that real time and high effectively software encryption in instant messaging. Experimental results show that if the size of plaintext is 1MB, the number of threads which is started respectively is 4,8,12,16, the speedup of improved algorithm increases 1.72~4.08 times than classical algorithm.
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