[9083] in cryptography@c2.net mail archive
GESG Identity-Based Public Key Cryptography (ID-PKC)
daemon@ATHENA.MIT.EDU (M Taylor)
Tue Jul 31 10:16:17 2001
Date: Tue, 31 Jul 2001 08:43:22 -0300 (ADT)
From: M Taylor <mctylr@privacy.nb.ca>
To: <cryptography@wasabisystems.com>
Message-ID: <Pine.LNX.4.30.0107310814450.16417-100000@privacy.nb.ca>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
The UK Communications-Electronics Security Group (CESG), the "defensive"
arm of the GCHQ, have published details about another PKC concept,
identity-based PKC, where every user's public key are predetermined by an
unique identifier, such as email address. It does use a(/two) trusted
server(s), but might be viewed as an easier to use infrastructure than
tranditional PKI in some situations.
The identity scheme ideas they present are similiar to Fiat-Shamir
identity signature scheme. The security is based upon Quadratic
Residuosity Problem (see: Goldwasser Micali 1984).
More details from: <http://www.cesg.gov.uk/id-pkc/index.htm>
including PDF of a slideshow, and requesting source code (definitely not
under an Open Source license), note as far as I know the CESG is
considering patents for this technology.
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