ciphergoth.org > Cryptology

Cryptology by Paul Crowley

Cryptanalysis

• Improved cryptanalysis of Py, designed by Eli Biham and Jennifer Seberry. Presented at SASC 2006.
• Truncated differential cryptanalysis of five rounds of Salsa20, designed by Daniel J Bernstein. Presented at SASC 2006.
• Bias in the LEVIATHAN stream cipher, designed by Scott Fluhrer and David McGrew of Cisco. Presented at FSE 2001.
• Problems with the Solitaire hand cipher designed by Bruce Schneier.
• Cryptanalysis of Carl Ellison's des|tran|des|tran|des
• Bias in the RC4 stream cipher designed by Ron Rivest. (The symmetry I discovered in RC4's internal states is covered in this FSE 1995 paper by Bob Jenkins.)
• Scott Fluhrer, Improved cryptanalysis of SSC2

Cryptography

• Mercy, a fast cipher for disk sector encryption. Presented at FSE 2000.
• Mirdek, a hand cipher using playing cards that turns out to be very weak against a chosen plaintext attack.

Other

• Generating random binary data from Geiger counters, a new, efficient, and simple algorithm for generating unbiased, uncorrelated random bits from independent samples of an unknown integer distribution.
• Software relevant to crypto, including source for algorithms for Geiger counter data and coin flip unbiasing.
• Writing about crypto.

ciphergoth.org > Cryptology