[17194] in cryptography@c2.net mail archive
new result: "anti-colliding" x.509 certificate
daemon@ATHENA.MIT.EDU (Weger, B.M.M. de)
Fri May 20 14:17:58 2005
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Fri, 1 Apr 2005 00:08:07 +0200
From: "Weger, B.M.M. de" <b.m.m.d.weger@TUE.nl>
To: "Weger, B.M.M. de" <b.m.m.d.weger@tue.nl>
Hi all,
Today I announce the construction of a valid X.509 certificate,
based on the MD5 hash function, that allows two different digital
signatures on the (identical) "to-be-signed" part. This is based
on a new technique of constructing MD5-anti-collisions. For details,=20
see http://www.win.tue.nl/~bdeweger/AntiCollidingCertificates/.=20
This type of certificate is called "anti-colliding", as this is=20
complementary to a construction, announced one month ago, of=20
"colliding x.509 certificates", i.e. two different X.509
certificates with identical signatures, based on MD5-collisions.
See http://www.win.tue.nl/~bdeweger/CollidingCertificates/.
Grtz,
Benne de Weger
---------------------------------------------------------------------
The Cryptography Mailing List
Unsubscribe by sending "unsubscribe cryptography" to majordomo@metzdowd.com
