chosen-cryptogram
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Musical cryptogram — The BACH motif. A musical cryptogram is a cryptogrammatic sequence of musical notes, a sequence which can be taken to refer to an extra musical text by some logical relationship, usually between note names and letters. The most common and best… … Wikipedia
Alberti cipher disk — The Alberti cipher disk, also called formula, is a cipher disc which was described by Leon Battista Alberti in his treatise De Cifris of 1467. The device embodies the first example of polyalphabetic substitution with mixed alphabets and variable… … Wikipedia
Cryptography — Secret code redirects here. For the Aya Kamiki album, see Secret Code. Symmetric key cryptography, where the same key is used both for encryption and decryption … Wikipedia
Bible code — A Bible code (also Torah code) is the notion that there are information patterns encrypted or coded form in the text of the Bible, or, more specifically, in the Torah, the first five books of the Hebrew Bible. The existence of such codes has been … Wikipedia
Frequency analysis — In cryptanalysis, frequency analysis is the study of the frequency of letters or groups of letters in a ciphertext. The method is used as an aid to breaking classical ciphers.this is wrong is based on the fact that, in any given stretch of… … Wikipedia
Ciphertext — The Zimmermann Telegram (as it was sent from Washington to Mexico) encrypted as ciphertext. This article is about encrypted information. For an overview of cryptographic technology in general, see Cryptography. In cryptography, ciphertext (or… … Wikipedia
Merkle-Hellman — (MH) was one of the earliest public key cryptosystems and was invented by Ralph Merkle and Martin Hellman in 1978. [Ralph Merkle and Martin Hellman, Hiding Information and Signatures in Trapdoor Knapsacks, IEEE Trans. Information Theory , 24(5),… … Wikipedia
Merkle–Hellman knapsack cryptosystem — The Merkle–Hellman knapsack cryptosystem was one of the earliest public key cryptosystems invented by Ralph Merkle and Martin Hellman in 1978.[1] Although its ideas are elegant, and far simpler than RSA, it has been broken.[2] Contents 1… … Wikipedia
Shakespeare authorship question — … Wikipedia
Substitution cipher — In cryptography, a substitution cipher is a method of encryption by which units of plaintext are replaced with ciphertext according to a regular system; the units may be single letters (the most common), pairs of letters, triplets of letters,… … Wikipedia
Caesar cipher — The action of a Caesar cipher is to replace each plaintext letter with one fixed number of places down the alphabet. This example is with a shift of three, so that a B in the p … Wikipedia
