XCRYPTOLOGY & STEGANOGRAPHY COLLECTIONS

The modern computer was born from Polish, British and American efforts to decode secret German and Japanese messages during the Second World War. The complex processes instantiated in these cryptographic machines are excellent examples of early hand, mechanical, electromechanical and electronic computing devices, spanning technologies from the relatively simple slide-rule, disk and cylinder mechanisms, to complex clockwork devices with gears and levers, and to the rotor machines that featured so prominently in the advances in decryption and computation developed at Bletchley Park.

• Dirk Rijmenants' Cipher Machines and Cryptology
• Frode Weierud's CryptoCellarCryptology and Its History
• David Hamer's Cryptologic Pages
• Jerry Proc's Crypto Machines
• Bob Lord's Crypto Pages
• Tom Perera's Cipher Machines
• Paul Reuvers & Marc Simons CryptoMuseum
• Brooke Clarke's Crypto Machines
  

1777 Aspinwall Revolutionary War Cipher A cipher regarding international trade.	17th Century Silver disk by Nicolas Bion Instrument maker to King Louis XIV.
	KRIPTO System Beyer A periodic disk cipher in a pocket watch case.
The Cook Cryptograph A mechanical version of an electrical ciphering device by the American Brake Shoe Company.	Key Guns  For inserting keys into cryptographic machines.
Bletchley Park Enigma Event 2009 Exhibits and exhibitors...	National Cryptologic Museum For inserting keys into cryptographic machines.
The Hebern Code Machine The first patented electromechanical rotor machine.	Soviet Machines The FIALKA, an improved 10-rotor version of the German Enigma.
Swiss NEMA An improved version of the German Enigma.	Electronic Microchips before the microcomputer.
One-Time-Tape Devices Absolutely secure if the tape is random and protected.	Hagelin Machines Mechanical marvels.
Rotors The heart of the maze which scrambles alphabets.	Disk & Strip Ciphers Early changeable monoalphabetic substitution devices.
Random Key Generators Random and pseudo-random key generators.	Grilles
Underwood Code Machine RIP-5. One of only nine built in 1925 for the US Navy to transcribe intercepted Japanese messages.	Polyalphabetic Ciphers Complex mechanical polyalphabetic substitution devices.
Burst Encoders Getting the message out so quickly that no one notices.	Paper Alphabets Relatively simple hand-coded algorithms.
Code Tables Still in use...	Silk Covert One-Time-Pads Intended to be hidden, used once, and then destroyed...
Frank Byron Rowlett Papers Signed and initialed cryptanalytic course materials.	Cryptanalysis with Hollerith Cards Predecessors of KWIC and KWOC using IBM punch card handling equipment.
Encrypted Post-Cards & Letters For business, romance and children.	Code Books For military or business by telegraphy.
Toys & Related Items For nostalgic and entertainment purposes.	Simulations Demonstrations of some basic principles.

Thumbs are 200 pixels high.