Errata for Invitation to Cryptology
Replacement Table of Primes for pages 370-372 of Invitation to Cryptology
Decrypting Texts - Codebreaking Software: Very useful Java applets written to decipher encrypted text or encipher plaintext.
Breaking the Vigenère Encryption System
Mafia Boss's Encrypted Messages Deciphered
Navajo Code Talkers in World War II
National Security Agency's Center for Cryptologic History
Multiplication and Division of Binary Numbers Calculator
Binary-Decimal-ASCII-Hexadecimal converter
Bits, Bytes, and Number Systems
An overview of Babylonian mathematics
Great Internet Mersenne Prime Search
Largest Known Prime by Year: A Brief History
Digits of 230402457-1: This 8.8 MB file lists the digits of the largest known prime number (as of June 2006).
What is the Difference Between 40-bit and 128-bit Encryption?
Announcement of 2006 Gödel Prize
The Cryptographic Mathematics of Enigma