Re: More X942-03 Comments

Jim:

> 1.  Section 2.1.2 in the paragraph on pubInfo:  There is a description that
> appears to say CMS defined UserKeyingMaterial as a 512-bit value.  There are
> two problems with this: a) CMS does not say anything about the length of ukm
> and b) no justification is shown here for a length of 512-bits.  Is this a
> magic length?
512 bits is the SHA-1 block size, so it is the maximum entropy that can be
inserted in this manner.

Russ