to write a message in cipher
21Voynich manuscript — The Voynich manuscript is a mysterious illustrated book written in an indecipherable text. It is thought to have been written between 1450 and 1520. The author, script and language of the manuscript remain unknown.Over its recorded existence, the …
22Intelligence in the American Revolutionary War — Intelligences in the American Revolutionary War was essentially monitored and sanctioned by the Continental Congress to provide military intelligence to the Continental Army to aid them in fighting the British during the American Revolutionary… …
23Pearl Harbor advance-knowledge debate — The Pearl Harbor advance knowledge debate is a dispute over what, if any, advance knowledge American officials had of Japan s December 7, 1941 attack on Pearl Harbor.Ever since the Japanese attack there has been debate as to how and why the… …
24Ultra — (sometimes capitalised ULTRA) was the name used by the British for intelligence resulting from decryption of encrypted German radio communications in World War II. The term eventually became the standard designation in both Britain and the United …
25Education of the Blind — • Includes statistics and history Catholic Encyclopedia. Kevin Knight. 2006. Education of the Blind Education of the Blind …
27Encryption — Encrypt redirects here. For the film, see Encrypt (film). This article is about algorithms for encryption and decryption. For an overview of cryptographic technology in general, see Cryptography. In cryptography, encryption is the process of… …
28Diffie–Hellman key exchange — (D–H)[nb 1] is a specific method of exchanging keys. It is one of the earliest practical examples of key exchange implemented within the field of cryptography. The Diffie–Hellman key exchange method allows two parties that have no prior knowledge …
29Signals intelligence in modern history — This article is a subset article of the article Signals intelligence, which addresses the unifying conceptual and technical factors and common technologies in this intelligence discipline. This article deals with signals intelligence in the… …
30Scytale — This article is about the encryption device; for the Dune character, see Scytale (Dune). In cryptography, a scytale (/sɪtəli/ rhymes with Italy, and also transliterated as skytale, Greek σκυτάλη , a baton) is a tool used to perform a… …
