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Frequency analysis is based on the fact that, in any given stretch of written language, certain letters and combinations of letters occur with varying frequencies. Moreover, there is a characteristic distribution of letters that is roughly the same for almost all samples of that language. For instance, given a section of English language, E, T ...
For the prefix "Stego-" as used in taxonomy, see List of commonly used taxonomic affixes. The same image viewed by white, blue, green, and red lights reveals different hidden numbers. Steganography ( / ˌstɛɡəˈnɒɡrəfi / ⓘ STEG-ə-NOG-rə-fee) is the practice of representing information within another message or physical object, in such ...
In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet.
); the next digit a pattern of 4 on, 4 off; the i-th least significant bit a pattern of 2 i on 2 i off. The most significant digit is an exception to this: for an n -bit Gray code, the most significant digit follows the pattern 2 n -1 on, 2 n -1 off, which is the same (cyclic) sequence of values as for the second-most significant digit, but ...
The Dolch word list is a list of frequently used English words (also known as sight words), compiled by Edward William Dolch, a major proponent of the "whole-word" method of beginning reading instruction. The list was first published in a journal article in 1936 [1] and then published in his book Problems in Reading in 1948. [2]
An orthography is a set of conventions for writing a language, including norms of spelling, punctuation, word boundaries, capitalization, hyphenation, and emphasis . Most national and international languages have an established writing system that has undergone substantial standardization, thus exhibiting less dialect variation than the spoken ...
ROT13 is a special case of the encryption algorithm known as a Caesar cipher, used by Julius Caesar in the 1st century BC. [3] Johann Ernst Elias Bessler, an 18th-century clockmaker and constructor of perpetual motion machines, pointed out that ROT13 encodes his surname as Orffyre. He used its latinised form, Orffyreus, as his pseudonym. [4]
Ten-code. Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1]