- letter frequency count
- подсчет частоты встречаемости букв (в тексте)
English-Russian cryptological dictionary . 2014.
letter frequency count
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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
Frequency distribution — In statistics, a frequency distribution is an arrangement of the values that one or more variables take in a sample. Each entry in the table contains the frequency or count of the occurrences of values within a particular group or interval, and… … Wikipedia
Frequency — For other uses, see Frequency (disambiguation). Three cyclically flashing lights, from lowest frequency (top) to highest frequency (bottom). f is the frequency in hertz (Hz), meaning the number of cycles per second. T is the period in seconds (s) … Wikipedia
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Rehearsal letter — A rehearsal letter is a boldface letter of the alphabet in an orchestral score, and its corresponding parts, that provides a convenient spot from which to resume rehearsal after a break. Rehearsal letters are most often used in scores of the… … Wikipedia
Index of coincidence — In cryptography, coincidence counting is the technique (invented by William F. Friedman[1]) of putting two texts side by side and counting the number of times that identical letters appear in the same position in both texts. This count, either as … Wikipedia
The Marriage of Figaro — For the Beaumarchais play, see The Marriage of Figaro (play). For the opera by Marcos Portugal (1799), see Marcos Portugal. Wolfgang Amadeus Mozart … Wikipedia
Keyboard layout — QWERTY keyboard on a laptop. A keyboard layout is any specific mechanical, visual, or functional arrangement of the keys, legends, or key–meaning associations (respectively) of a computer, typewriter, or other typographic keyboard. Mechanical… … Wikipedia
Transposition cipher — In cryptography, a transposition cipher is a method of encryption by which the positions held by units of plaintext (which are commonly characters or groups of characters) are shifted according to a regular system, so that the ciphertext… … Wikipedia
Huffman coding — Huffman tree generated from the exact frequencies of the text this is an example of a huffman tree . The frequencies and codes of each character are below. Encoding the sentence with this code requires 135 bits, as opposed of 288 bits if 36… … Wikipedia
AWK — This article is about the programming language. For other uses, see AWK (disambiguation). AWK Paradigm(s) scripting, procedural, event driven Appeared in 1977 Designed by Alfred Aho, Peter Weinberger, and Brian Kernighan … Wikipedia
