Hacking Secret Ciphers with Python

Chapter 19 – The Vigenère Cipher 287

THE VIGENÈRE CIPHER

Topics Covered In This Chapter:
 Subkeys

“I believed then, and continue to believe now, that

the benefits to our security and freedom of widely

available cryptography far, far outweigh the

inevitable damage that comes from its use by

criminals and terrorists... I believed, and continue

to believe, that the arguments against widely

available cryptography, while certainly advanced

by people of good will, did not hold up against the

cold light of reason and were inconsistent with the

most basic American values.”

Matt Blaze, AT&T Labs, September 2001