Subject: [MSEC] a question about UMAC

From: "zen" <[email-masked]>
Date: Sat, 29 Mar 2003 17:6:42 +0800

Hi,folks,

Who know about <UMAC:fast and secure message authentication> written by J.Black and H.Krawczyk?

In the last part of this paper-Directions,they said:

"An interesting possibility is to restructure UMAC so that a receiver can verify a tag to various forgery probabilities|e.g., changing UMAC-MMX-60 to allow tags to be verified, at increasing cost, to forging probabilities of ...Such a feature is particularly attractive for authenticating broadcasts to receivers of different security policies or computational capabilities."
	
What is it mean? It can be used in multicast for authentication?
 	
How to restructure UMAC for it? Where is the reference on it?

If you know it ,tell me.Thank you very much.

I hope to use it in my multicast research work.

Best,

Zen

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