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Third IEEE International Security in Storage Workshop (SISW'05)
Efficient Authentication of Large, Dynamic Data Sets Using Galois/Counter Mode (GCM)
San Francisco, California
December 13-December 13
ISBN: 0-7695-2537-7
David McGrew, Cisco Systems, Inc., USA
The Galois/Counter Mode (GCM) of operation can be used as an incremental Message Authentication Code (MAC); in this respect, it is unique among the crypto algorithms used in practice. We show that it has this property, and show how to efficiently recompute a MAC after small changes within a message, after the appending or prepending of data to a message, or the truncation of data from the start or end of a message. Incremental MACs have great utility for protecting data at rest. In particular, they can be used to protect a large, dynamic data set using only a small, constant amount of memory.
Citation:
David McGrew, "Efficient Authentication of Large, Dynamic Data Sets Using Galois/Counter Mode (GCM)," sisw, pp.89-94, Third IEEE International Security in Storage Workshop (SISW'05), 2005
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