PRACTICAL SECURITY


IEEE Internet Computing, May/June 2009, pp. 96, 94-95

Keys Don't Grow in Threes image 

Keys Don’t Grow in Threes

by Stephen Farrell

Many Internet security mechanisms depend on the use of cryptographic algorithms for various forms of authentication and confidentiality. Even when well-known and standardized cryptographic algorithms are used in well-known protocols, some parameters must be specified, the most important of which are usually algorithm identifiers and key or hash-output lengths. Here, I review some recent key length recommendations and compare those to current usage.

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