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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.
Ultra (cryptography) Ultra was the designation adopted by British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School (GC&CS) at Bletchley Park. [1] Ultra eventually became the standard designation among ...
Here’s how to scan a document on your iPhone: Open the notes app. Create a new note by clicking the bottom right corner. Tap the camera icon above the keyboard. Older iPhones may have this as a ...
A hidden message is information that is not immediately noticeable, and that must be discovered or uncovered and interpreted before it can be known. 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 ...
Here’s the truth. Myth: When you unsend a text, the recipient will never know. Reality: Your recipient gets a notification. Yes, you can take back a message you sent, but there’s more to it ...
Here’s how to retrieve deleted text messages on an iPhone. Most of us have tons of text messages on our iPhones from the past year alone. There’s not always a reason to keep them, and often we ...
However, in cryptography, code has a more specific meaning: the replacement of a unit of plaintext (i.e., a meaningful word or phrase) with a code word (for example, "wallaby" replaces "attack at dawn"). A cypher, in contrast, is a scheme for changing or substituting an element below such a level (a letter, a syllable, or a pair of letters, etc ...