-----BEGIN PGP SIGNED MESSAGE----- In <199708202137.WAA00738@server.test.net>, on 08/20/97 at 10:37 PM, Adam Back <aba@dcs.ex.ac.uk> said:
One solution to this is for the time-stamper to publish all time-stamps (they are quite small being detached signatures), and publish a siganature on all the time-stamps stored in one file each day. Perhaps even publish the signature in a newspaper. Anyone with that newspaper, or an archive of the master signature only, will be able to verify any claimed time-stamps -- the publically published hash (in the signature) must match the time-stamps archived for that day.
This is how Stamper works. The time stampes are published to various NG's & mailling lists once a week. - -- - --------------------------------------------------------------- William H. Geiger III http://www.amaranth.com/~whgiii Geiger Consulting Cooking With Warp 4.0 Author of E-Secure - PGP Front End for MR/2 Ice PGP & MR/2 the only way for secure e-mail. OS/2 PGP 2.6.3a at: http://www.amaranth.com/~whgiii/pgpmr2.html - --------------------------------------------------------------- -----BEGIN PGP SIGNATURE----- Version: 2.6.3a Charset: cp850 Comment: Registered_User_E-Secure_v1.1b1_ES000000 iQCVAwUBM/t2jY9Co1n+aLhhAQHUgwQAnTprQx1BDbWaj5gDeOn+6MMNQE9AW/N6 3CDvw+iYokUBxYkdqpR+K2b9xCCO2Lu/L9xcnIEb0Wehe5YG8usm6tmwaVVd9G7c pnI4XlYxrNjaZROAWiAYPdBq+hE/HMNUo9B3mmeAeXftoIj3VJ5JvBkzWNdUB/Lj qrc5dslsXTw= =Q2QL -----END PGP SIGNATURE-----