John Boyer wrote: > > It should also be noted that, according to the current spec [1], a signature > can be enveloping, enveloped and detached all at the same time. The problem as I can see it is that we distinguish between signature types (enveloping, enveloped, detached), but a signature can be of more than one type at the same time. As an alternative approach, consider to label the types which a data entity to be signed could have, in relation to its signature: o A data entity can be EXTERNAL or INTERNAL in relation to the document holding the signature element o An INTERNAL data entity can be INSIDE or OUTSIDE in relation to the the signature element The advantage of this kind of labelling is that the attribute combinations o EXTERNAL, o INTERNAL-INSIDE and o INTERNAL-OUTSIDE are "exclusive-or", in contrast to (enveloping, enveloped, detached). -- --------------------------------------------------------------- Gregor Karlinger mailto://gregor.karlinger@iaik.at Institute for Applied Information Processing and Communications Austria ---------------------------------------------------------------
Received on Tuesday, 11 January 2000 06:04:05 UTC