[Blocks-development] SNAKE Key Exchange Algorithm

[Blat F. <pet...@ho...>]

SNAKE is an authenticating key exchange algorithm I
created some time ago, and is very much in the same
vein as SPEKE or SRP-3, except that it is unpatented
and in the public domain.

Benjamin has kindly offered to host the SNAKE home
page on http://www.kripto.org/snake

This doesnt have much to do with Blocks other
than the fact that Blocks borrowed some of the
crypto and netcode from SNAKE, but I thought you
guys might be interested anyway :)

SNAKE can guarantee a secure network session based
soley on a short password such as a single word
like 'dog', 'cat' or 'secret'. This allows secure
transactions without a PKI, and could even be used
for things like anonymous payment schemes or
the downloading on-the-fly of large private keys.

To reiterate, the key length of the password is
not directly relevant to security of the session.
This goes against popular crypto teachings.

There are no known attacks other than online
guessing and that can be minimised using denial
of service after a suitable number of failures.
SNAKE is immune to dictionary attacks and all
other offline attacks that I know of, and offers
perfect forward secrecy and authentication.

ttfn

PG.





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