Hi Take a look at: http://lists.gnupg.org/pipermail/gnupg-devel/2002-May/007159.html Have you considered what Adrian writes about here in this forum? I think it is a very good solution to add a 'intended encryption key' or somthing like that in the section 5.2.3.1. Signature Subpacket Specification. -- Terje Bråten