Bob:
I'll bite. What is GULS?
I note that Emile's message answers many possible questions but not
this one. GULS is a new ISO/IEC standard on "Generic Upper Layers
Security" which is essentially a set of security protocol building
tools for use in adding security to ASN.1-based applications.
Also, let me correct a small inaccuracy in my earlier message that
might confuse. The parameterized type added by GULS is the PROTECTED
type, which is able to call out any of many different "security
transformations". GULS SIGNED and GULS SIGNATURE are two instances of
security transformations, defined in annexes to the standard.
...Warwick Ford