archeological email about proposal for doing pgp-like public key (from 1981): http://www.garlic.com/~lynn/2006w.html#email810515 the internal network was larger than the arpanet/internet from just about the beginning until sometime summer of '85. corporate guidelines had become that all links/transmission leaving corporate facilities were required to be encrypted. in the '80s this met lots of link encryptors (in the mid-80s, there was claim that internal network had over half of all the link encryptors in the world). a major crypto problem was with just about every link that crossed any national boundary created problems with both national gov. links within national boundaries would usually get away with argument that it was purely internal communication within the same corporate entity. then there was all sorts of resistance encountered attempting to apply that argument to links that cross national boundary (from just about every national entity). For other archeological lore ... old posting with new networking activity from 1983 http://www.garlic.com/2006k.html#8 above posting includes listing of locations (around the world) that had one or more new network links (on the internal network) added sometime during 1983 (large precentage involved connections requiring link encryptors). more recent post http://www.garlic.com/~lynn/2008h.html#87 mentioning coming to the realization (in the 80s) that there were three kinds of crypto.