Anonymous ID: 278fd3 Dec. 19, 2019, 4:48 a.m. No.7559346   🗄️.is đź”—kun

Ciphers and Coded Letters

 

Ciphers and secret codes were used to ensure that the contents of a letter could not be understood if correspondence was captured. In ciphers, letters were used to represent and replace other letters to mask the true message of the missive. The letter’s recipient utilized a key–which referenced corresponding pages and letters from a well-known book, such as Entick's Dictionary–to decode the document’s true message. Some spy groups even created their own pocket guide to serve as a cipher’s key. Similarly, some letters were written in intricate secret codes where numbers and special characters replaced letters, a method most notably practiced by the Culper Spy Ring.

 

 

https://www.mountvernon.org/george-washington/the-revolutionary-war/spying-and-espionage/spy-techniques-of-the-revolutionary-war/