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RE: WG Last Call:draft-ietf-smime-rcek-01.txt

2001-03-07 17:12:15

I also have a copyright-free description of the ANSI X9.63 KDF that I can
provide if anyone is interested in adding the I-D "wrapping".

Best regards. Simon

FRousseau(_at_)chrysalis-its(_dot_)com on 03/07/2001 02:15:15 PM

To:   WWhyte(_at_)baltimore(_dot_)com
cc:   ietf-smime(_at_)imc(_dot_)org, housley(_at_)spyrus(_dot_)com, 
stephen(_dot_)farrell(_at_)baltimore(_dot_)ie (bcc:
      Simon Blake-Wilson/Certicom)
Subject:  RE: WG Last Call:draft-ietf-smime-rcek-01.txt

Hi William,

I also prefer the Key Derivation Function from ANSI X9.63 and I just
remembered that it is also described in Section 3.6.1 of the SECG SEC1
standard, which is freely available from the SECG web site:

Therefore it could be referred and used by this Internet Draft.


Francois Rousseau
Director of Standards and Conformance
One Chrysalis Way
Ottawa, Ontario, CANADA, K2G 6P9
frousseau(_at_)chrysalis-its(_dot_)com    Tel. (613) 723-5076 ext. 3419   Fax. (613) 723-5078

-----Original Message-----
From: William Whyte [mailto:WWhyte(_at_)baltimore(_dot_)com]
Sent: Monday, February 19, 2001 04:58
To: Russ Housley; stephen(_dot_)farrell(_at_)baltimore(_dot_)ie
Cc: ietf-smime(_at_)imc(_dot_)org
Subject: RE: WG Last Call:draft-ietf-smime-rcek-01.txt

William suggests byte reversal instead, which seems ok from both

Okay.  So, since bitwise-NOT and bit-reversal both have shortcomings, what

are you going to use as the mandatory to implement transform?

As Stephen says, I've suggested byte reversal. In fact, what I
would most like to see as the mandatory to implement transform
is X9.63 key derivation (the key derivation function referred
to as KDF2 in IEEE P1363a), but to the best of my knowledge there's
no stable, freely-available description of this that we could
reference. If anyone fancied writing it up as an RFC that'd
be very nice...

(I have to say I'm uncomfortable with the hacky use of PKCS#5
here. But at least PKCS#5 is referenceable).



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