new result: "anti-colliding" x.509 certificate

[Weger, B.M.M. de]

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, 
see http://www.win.tue.nl/~bdeweger/AntiCollidingCertificates/. 

This type of certificate is called "anti-colliding", as this is 
complementary to a construction, announced one month ago, of 
"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 at metzdowd.com