Because I registered for the upcoming Internet Expo in San Jose, I got, by mail, an announcement of forthcoming Post Office services. These "Postal Electronic Commerce Services" will be demo'd at Booth 626 at this show on February 20-21. The flyer says: "Postal Electronic Commerce Services will provide end-to-end security, confidentiality, integrity, and proof of origin to all your electronic information transfer and storage." Interestingly they suggest that the government is to be a prime beneficiary: "For governments to get full value from the increased use of personal computers and public access terminals (kiosks) the privacy and security of every transaction must be guaranteed." Under the HOW IT WORKS section, after a quick gloss on public key cryptography they state: "Once a person generates a unique key (using their own software), they will take the "public" part of that key to a postal representative along with documents that prove their identity. Postal Electronic Commerce Services will then issue a certificate which guarantees that the identity of the person matches the "public" key that they presented. PECS will also electronically postmark the document using its own set of "keys". This guarantees the validity of the stamp and legally establishes the existence of the document." They offer a FAX number for further info: (202) 268 4399 and a phone too at (202) 268 3435. No mention of GAK or key length limits that I could see. I will surely be at their booth on the 20th.