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X. Y. Z. The tap code, sometimes called the knock code, is a way to encode text messages on a letter-by-letter basis in a very simple way. The message is transmitted using a series of tap sounds, hence its name. [1] The tap code has been commonly used by prisoners to communicate with each other. The method of communicating is usually by tapping ...
The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid. The example key shows one way the letters can be assigned to the grid.
Hidden messages include backwards audio messages, hidden visual messages and symbolic or cryptic codes such as a crossword or cipher. Although there are many legitimate examples of hidden messages created with techniques such as backmasking and steganography, many so-called hidden messages are merely fanciful imaginings or apophany .
Caesar cipher. The action of a Caesar cipher is to replace each plaintext letter with a different one a fixed number of places down the alphabet. The cipher illustrated here uses a left shift of 3, so that (for example) each occurrence of E in the plaintext becomes B in the ciphertext. In cryptography, a Caesar cipher, also known as Caesar's ...
Book cipher. The King James Bible, a highly available publication suitable for the book cipher. A book cipher is a cipher in which each word or letter in the plaintext of a message is replaced by some code that locates it in another text, the key . A simple version of such a cipher would use a specific book as the key, and would replace each ...
Patricia Davies (née Owtram; born 19 June 1923) is an English former codebreaker who served as a special duties linguist in the Women’s Royal Naval Service during World War II. She and her younger sister Jean Argles are often referred to as "The Codebreaking Sisters". [1] As a teenage interceptor, Davies listened to radio transmissions in ...
Open sesame. Ali Baba overhearing one of the thieves saying "Open Sesame". " Open sesame " ( French: Sésame, ouvre-toi; Arabic: افتح يا سمسم, romanized : iftaḥ yā simsim) is a magical phrase in the story of "Ali Baba and the Forty Thieves" in Antoine Galland 's version of One Thousand and One Nights. It opens the mouth of a cave ...
Unbabel, a tech company that provides both machine and human-based translation services for businesses, has created a new AI model that it says beats OpenAI’s GPT-4o and other commercially ...