[41787] in Cypherpunks
Re: STT - useable in real life ?
daemon@ATHENA.MIT.EDU (Hal)
Thu Oct 19 10:33:55 1995
Date: Thu, 19 Oct 1995 07:30:05 -0700
From: Hal <hfinney@shell.portal.com>
To: cypherpunks@toad.com
lyalc@ozemail.com.au (lyal collins) writes:
>From reading the STT specs, a 'credential' is made up of typically 4
>certificates - root, country CA, issuer Ca, and cardholder/merchant.
>Two certificates are based upon a 1024 bit public keys, 1 (root) is 2048
>while the cardholder PK is 512/768 bit.
>I believe a decrypt operation is required to verify each certificate.
Usually, decrypt operations are needed to ISSUE certificates but not to
verify them. Verification is equivalent to an encrypt operation using a
small exponent, and may be roughly about 100 times faster than a decrypt.
Hal
