1. 암호학의 역사와 알고리즘들 - http://www.quadibloc.com/crypto/jscrypt.htm
2. 비즈네르 암호 - http://rainmasta.egloos.com/4057477
3. Caesar cipher - http://en.wikipedia.org/wiki/Caesar_cipher
4. The Beginner's Guide to Cryptography - http://www.murky.org/blg/category/cryptography/
5. DES - http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf
6. 소인수 분해 참고 - http://primes.utm.edu/
7. 암호관련 논문과 암호학자 사진들 - http://www.pbcrypto.com/index.htm
