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Re: [P1363:] Review copy of ISO/IEC 11770-4



Dear working group,

If you have more feedback on ISO/IEC 11770-4, please
send it now.

For EC settings, we've identified another
interoperability issue with ISO/IEC 11770-4 and
P1363.2.

11770-4 uses both (x,y) coordinates to derive keys and
key confirmation values, whereas P1363.2 omits the y
in key derivation (as in 1363) and uses the "drop-y"
(GE2OSP-X) representation in key confirmation.

For what it's worth, I think P1363.2 omitted y in key
derivation to align with analogous 1363-2000 methods. 
I don't recall why we chose the "drop y" in key
confirmation, if there was a reason.  And I don't know
why ISO/IEC specified these differently.

-- David


At 09:31 AM 10/7/2005 -0700, D Jablon wrote:
>Dear group,
>
>I volunteered to collect our feedback on FDIS 11770-4
>and forward it by 10/17.
>Please send me what you have ASAP.
>[...]



	
		
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