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Network Working Group D. Scherkl
Internet-Draft Biodata Application Security AG
Expires October 2001 April 2001
Updates: RFC 2440
OpenPGP Elliptic Curve Algorithm Formats
7. Named Curves
Known curve names are the following (as defined in X9.63-1998 [3])
F(2^163)
F(2^176)
F(2^191)
F(2^208)
F(2^239)
F(2^272)
F(2^304)
F(2^359)
F(2^368)
F(2^431)
163, 191, 239, 359, 431 is primes
but 176, 208, 272, 304, 368 is not primes
isn't the curves over F(2^m) with composite m suspected to Nigel Smarts's
attack ?
see: http://www.hpl.hp.com./techreports/2000/HPL-2000-10.html
why these curves was choosen ?
Nist currently recomends curves over F(2^163), F(2^233), F(2^283), F(2^409),
F(2^571)
for all these curves m is prime.
see: http://csrc.nist.gov/publications/fips/fips186-2/fips186-2.pdf
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