Message Authentication for Stream

Hidenori KUWAKADO  Hatsukazu TANAKA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E85-A   No.1   pp.190-193
Publication Date: 2002/01/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Cryptography and Information Security)
information security,  message authentication,  stream,  hash function,  

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The function of a message authentication code (MAC) is to verify the validity of a whole message. The disadvantage of usual MACs is that a receiver can not check its validity until the receipt of a message is finished. Hence, usual MACs are not suitable for verifying a large amount of data such as video and audio (called stream). In this letter, we propose a MAC such that the validity of a stream can be consecutively verified without waiting for the end of the reception. In addition, we show its implementations: one is based on practical hash functions, and the other is based on universal hash functions.