tontonan
8:21
The Science of Codes: An Intro to Cryptography
14:10
The Most Famous Unsolved Ciphers
5:02
The Pigpen Cipher (animated)
1:39
Germany's Real Secret Code Machine - Code-Breakers: Bletchley Park's Lost Heroes - BBC
10:12
Diana Cryptosystem Cipher - unbreakable cipher used during Vietnam & Cold War
2:04
Encrypting a Large Message
22:36
How to Use a Basic Cipher to Encode and Decode a Secret Message
3:09
9-1 Three phases of cryptographically secure communication
