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  2. Music cipher - Wikipedia

    en.wikipedia.org/wiki/Music_cipher

    While some systems reuse the same seven pitches for multiple letters (e.g., the pitch A can represent the letters A, H, O, or V), [10] most algorithms combine these pitches with other musical attributes to achieve a one-to-one mapping. Perhaps the earliest documented music cipher is found in a manuscript from 1432 called "The Sermon Booklets of ...

  3. Musical cryptogram - Wikipedia

    en.wikipedia.org/wiki/Musical_cryptogram

    A musical cryptogram is a cryptogrammatic sequence of musical symbols 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 known examples result from composers using musically translated versions of their own or their friends' names (or initials) as ...

  4. List of forms of word play - Wikipedia

    en.wikipedia.org/wiki/List_of_forms_of_word_play

    Blanagram: rearranging the letters of a word or phrase and substituting one single letter to produce a new word or phrase; Letter bank: using the letters from a certain word or phrase as many times as wanted to produce a new word or phrase; Jumble: a kind of word game in which the solution of a puzzle is its anagram

  5. Substitution cipher - Wikipedia

    en.wikipedia.org/wiki/Substitution_cipher

    In cryptography, a substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by performing ...

  6. Aristocrat Cipher - Wikipedia

    en.wikipedia.org/wiki/Aristocrat_Cipher

    The method creates a chain-reaction when a letter is decrypted, this means that after decrypting a word, the letters of that word can be used to decrypt other words. [9] Depending on the type of cipher, a brute force attack method can be used, which attempts to use all possible keys for the encryption. [10]

  7. Cipher - Wikipedia

    en.wikipedia.org/wiki/Cipher

    Edward Larsson's rune cipher resembling that found on the Kensington Runestone.Also includes runically unrelated blackletter writing style and pigpen cipher.. In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption—a series of well-defined steps that can be followed as a procedure.

  8. Tap code - Wikipedia

    en.wikipedia.org/wiki/Tap_code

    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.

  9. Frequency analysis - Wikipedia

    en.wikipedia.org/wiki/Frequency_analysis

    Eve could use frequency analysis to help solve the message along the following lines: counts of the letters in the cryptogram show that I is the most common single letter, [2] XL most common bigram, and XLI is the most common trigram. e is the most common letter in the English language, th is the most common bigram, and the is the