DSA and ECC (was: Looking for Elgamal sign+encrypt key information)

Atom 'Smasher' atom-gpg at suspicious.org
Tue Mar 23 23:04:00 CET 2004


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> If MDC-2 is applied with DES as block cipher the hash is only 2x64=128
> bits. Is this what is stated in the new DSS (ANSI X-9.31)? I thought a
> longer hash would be needed to make any use of longer signing keys. With
> the "old" RSA signature algo a much longer hash can be used e.g. the
> forthcoming SHA-256.
============================

"forthcoming SHA-256"???

gpg 1.2.4 can handle SHA256, but only to verify, not to sign.

1.3.5 handles SHA256 (H8), SHA384 (H9) and SHA512 (H10).

	Secure Hash Standard (SHS)
	(SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512 algorithms)
	http://csrc.nist.gov/cryptval/shs.htm

btw, why does gpg list the SHA-x family of hashes without a dash? the
official spec ~does~ include a dash ;)


        ...atom

 _________________________________________
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	"Everything that can be invented has been invented."
		-- Charles H. Duell,
		Commissioner, U.S. Office of Patents, 1899
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Comment: What is this gibberish?  -  http://atom.smasher.org/links/#digital_signatures

iD8DBQFAYKTDnCgLvz19QeMRAh0cAJ9eQlwJhxbYq7d2G80WQ5GA/AMkiQCfZsc/
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=1hAh
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