The U.S. National Institute of Standards and Technology (NIST) has published rules regarding the use of encryption within U.S. government agencies, in Special Publication 800-131A. In recognition of limited lifespan of encryption techniques as computers grow ever more powerful, this publication specifies end-of-life dates for various cryptosystems. In this publication, Triple DES has two key lengths, known as two-key Triple DES and three-key Triple DES. TWo-key Triple DES has been assessed at a security strength of 80 bits, whereas three-key Triple DES is assessed at a security strength of 112 bits.Skipjack, a block cipher developed by the U.S. National Security Agency (NSA), is assessed at a security strength of 80 bits. AES has three approved key lengths: 128,192, and 256 bits. AES-128 is assessed at a security strength of 128 bits, AES 192 at a security strength of 192 bit, and AES-256 at a security strength of 256 bits.
The NIST transition schedule for encryption algorithms is provided in Table 10-1.
The U.S. National Institute of Standards and Technology (NIST) has published rules regarding the use of encryption within U.S. government agencies, in Special Publication 800-131A. In recognition of limited lifespan of encryption techniques as computers grow ever more powerful, this publication specifies end-of-life dates for various cryptosystems. In this publication, Triple DES has two key lengths, known as two-key Triple DES and three-key Triple DES. TWo-key Triple DES has been assessed at a security strength of 80 bits, whereas three-key Triple DES is assessed at a security strength of 112 bits.Skipjack, a block cipher developed by the U.S. National Security Agency (NSA), is assessed at a security strength of 80 bits. AES has three approved key lengths: 128,192, and 256 bits. AES-128 is assessed at a security strength of 128 bits, AES 192 at a security strength of 192 bit, and AES-256 at a security strength of 256 bits.The NIST transition schedule for encryption algorithms is provided in Table 10-1.
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