Chaocipher Revealed

[I)ruid]

CHAOCIPHER REVEALED: THE ALGORITHM
Moshe Rubin © 2 July 2010

ADDRESS: Rechov Shaulson 59/6, Jerusalem 95400 ISRAEL;
mos...@mountainvistasoft.com.

ABSTRACT: Chaocipher is a method of encryption invented by John F. Byrne
in 1918, who tried unsuccessfully to interest the US Signal Corp and
Navy in his system. In 1954, Byrne presented Chaocipher-encrypted
messages as a challenge in his autobiography “Silent Years”. Although
numerous students of cryptanalysis attempted to solve the challenge
messages over the years, none succeeded. Chaocipher has been a closely
guarded secret known only to a handful of persons. Following fruitful
negotiations with the Byrne family during the period 2009-2010, the
Chaocipher papers and materials have been donated to the National
Cryptologic Museum in Ft. Meade, MD. This paper presents the first full
disclosure and description of Byrne’s Chaocipher algorithm..

http://www.ciphermysteries.com/2010/07/03/the-chaocipher-revealed

-- 
I)ruid, C²ISSP
dr...@caughq.org
http://druid.caughq.org


signature.asc
Description: This is a digitally signed message part

New Attacks against AES-256

[I)ruid]

Paper and details are not yet public, but Schneier provides a summary:

http://www.schneier.com/blog/archives/2009/07/another_new_aes.html

Basically, if AES-256 is implemented with fewer rounds than the standard
specifies (essentially the number of rounds recommended for AES-128), it
is susceptible to a number of related-key attacks.

-- 
I)ruid, C²ISSP
dr...@caughq.org
http://druid.caughq.org

-
The Cryptography Mailing List
Unsubscribe by sending unsubscribe cryptography to majord...@metzdowd.com

SHA-1 in 2**52

[I)ruid]

Differential Path for SHA-1 with complexity O(2**52)
Cameron McDonald, Philip Hawkes, and Josef Pieprzyk
Macquarie University

http://eprint.iacr.org/2009/259.pdf

-- 
I)ruid, C²ISSP
dr...@caughq.org
http://druid.caughq.org


signature.asc
Description: This is a digitally signed message part