A few aspects of cryptology
Cipher machines - Enigma, FIALKA, Geheimschreiber, NEMA, SIGABA, and others.
Downloads - published articles on Enigma and other cipher-related material.
Bletchley Park - a 'must' for the crypto pilgrim...!
The National Cryptologic Museum - a unique collection...!
The National Cryptologic Museum Foundation - NCM's support organization
The American Cryptogram Association - the crypto-enthusiast's society...!
Cryptologia - the professional quarterly journal.
Major league players - GCHQ, NSA and others.
Links to other crypto-related web sites
- mostly Enigma (but other stuff too...!)