A fast chaotic cryptographic scheme with dynamic look-up table

We propose a fast chaotic cryptographic scheme based on iterating a logistic map. In particular. no random numbers need to be generated and the look-up table used in the cryptographic process is updated dynamically. Simulation results show that the proposed method leads to a substantial reduction in the encryption and decryption time. As a result, chaotic cryptography becomes more practical in the secure transmission of large multi-media files over public data communication network. (C) 2002 Elsevier Science B.V. All rights reserved.