The Spy’s ToolKit
The Spy’s Toolkit 500 B.C.: Scytales The Spartans and ancient Greeks used scytales — a cylinder wrapped in parchment containing a message — to communicate during military campaigns. To decipher the code, the recipient would place the parchment or other material over a similarly rod. 1466: Alberti Cipher Thought to be one of the first polyphabetic …