hi.

The rev. 23 has a normative change in section 10.10 as:

10.10.  Credentials Guessing Attacks
  [...]
 Generated tokens and other credentials not intended for handling by
   end-users MUST be constructed from a cryptographically strong random
   or pseudo-random number sequence ([RFC1750]) generated by the
   authorization server.

Does this normative requirement only allows pseudo-random number
sequence described as in Section 6.3 of RFC1750?
Or does it allow something that includes it? I gather that it is the later,
but the wording "constructed from" sounds a little vague.

It also states:

 The probability of any two values being
   identical MUST be less than or equal to 2^(-128) and SHOULD be less
   than or equal to 2^(-160).

It is "the probability that a randomly generated guessed value being
identical to
the authoritatively generated token or credential value", I suppose.

--
Nat Sakimura (=nat)
Chairman, OpenID Foundation
http://nat.sakimura.org/
@_nat_en
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