On Sun, Aug 28, 2005 at 08:39:38AM +0800, Syan Tan wrote: > X-Mailer: AtMail 4.03 > > How does gnotary prevent the timestamps in signatures from being altered at a > later time It doesn't. But doing so renders the signature invalid.
> , or a stored signature of an original document be replaced with a different > signature of a different document at some other time , and that altered > signature > also being passed on to colluding client ? What help is that to potential cheaters ? You keep a signed hash of the document. If you hash the original it needs to produce the same value as the signed hash shows. Karsten -- GPG key ID E4071346 @ wwwkeys.pgp.net E167 67FD A291 2BEA 73BD 4537 78B9 A9F9 E407 1346 _______________________________________________ Gnumed-devel mailing list [email protected] http://lists.gnu.org/mailman/listinfo/gnumed-devel
