Chameleon - A New Kind of Stream Cipher
نویسندگان
چکیده
Stream cipher systems are used to protect intellectual prop erty in pay TV and a number of other applications In some of these it would be convenient if a single ciphertext could be broadcast and subscribers given slightly di erent deciphering keys that had the e ect of producing slightly di erent plaintexts In this way a subscriber who illegally resold material licensed to him could be traced Previously such tracing could be done using a one time pad or with complicated key management schemes In this paper we show how to endow any stream cipher with this potentially useful property We also present a simple traitor tracing scheme based on random coding with which it can be used
منابع مشابه
Design and Analysis of RC4-like Stream Ciphers
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