Strawman non-repudiation issues

["Nick Pope" <pope@secstan.com>]

The strawman suggests that message non-repudiation might be provided by WSS.

The WSS SOAP message security 1.0 indicates that (excuse the double
negative) non-repudiation is a "non-goal".  It is particularly not clear to
me how proof can be provided back to the sender with WSS.

What threat scenarios is the message non-repudation services to protect
against?

For example is a court considered to be an irrefutable source?  If so would
non-repudiation protection against later denial by the court representatives
the clerk and judge be appropriate?  (Excuse any inappropriate thinking from
a security technician).

The message reciepts Court and sealing could have a role in providing a form
of non-repudiation relating to court submissions but it is not clear how
this fits in with the requirements.

Nick