Marvin Shapiro's Online Cipher Problem

The Science of Secrecy page

Fire-O's Crypto info/contest page

Frank and Sylvia Lewis' (R MASTERTON & WHOIS) web site

DOPPELSCHACH ftp site

KMR's shareware crypto-quote puzzles for Windows

The National Puzzlers' League page

Today's Cryptogram, shareware and Contest.

Cryptogram web site.

Parsly Crypto Info