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The Culper Code Book
The Culper Code Book was used during The American Revolutionary War in 1778 by George Washington's Culper Spy Ring. Developed by Ben Tallmadge, it consisted of 763 numerical codes to represent various words, names, and locations. This code book was…
Vigenère Cipher
The Vigenère cipher was created in the 16th-century by French cryptographer Blaise de Vigenère. It was revered as "le chiffre indéchiffrable" or "the unbreakable cipher" for many years after its invention.
It works by concealing the original…
It works by concealing the original…
Tags: Vigenere Cipher
Playfair Cipher
The Playfair Cipher was created in 1854 by Charles Wheatstone, and named after Lord Playfair for promoting its use. Initially, it was rejected by the British Foreign Office for appearing complicated. Later, the military began to use it for being…
Tags: Playfair Cipher
Confederate Cipher Disk
The Confederate Cipher Disk was used in The American Civil War by the Confederate Army. Created by Francis LaBarre and based on the Vigenère Cipher, it consisted of two brass discs with the alphabet on each. As a mechanical cipher tool, it allowed…
ADFGVX Cipher
The ADFGVX cipher was developed by Colonel Fritz Nebel and introduced in March 1918. Germany used it as a field cipher during WWI. It was named the ADFGVX cipher for the letters used to create ciphertext, chosen for their distinctiveness in morse…
Tags: ADFGVX Cipher, WWI
Giddings Field Message Book
The Giddings Field Message Book was used in 1898 during the Spanish-American War. Designed by Major Howard A. Giddings of the Brigadier Signal Officer Office of the Connecticut National Guard, it composed of a pocket pad with a built in US Army…
DES
The Data Encryption Standard (DES) is an outdated form of encryption that became vulnerable to brute-force attacks, and was replaced by AES. Developed by IBM in the 1970s, it was used by the U.S. government as their official Federal Information…
Tags: DES, Encryption