| 单词 | rail-fence cipher |
| 释义 | > as lemmasrail-fence cipher 2. Cryptography. In full rail-fence cipher. A transposition cipher in which the cipher text is created by writing successive letters of the plain text on each of two (or more) rows in turn, and then reading across the rows in order.If there are two rows, the first letter is written in the first position of the first row; the second in the second position of the second row; the third in the third position of the first row; and so on, in a zigzag pattern. ΘΚΠ the mind > mental capacity > knowledge > secrecy, concealment > code, cipher > [noun] > particular codes character1605 needle-alphabet1663 unicode1886 rail fence1916 Vigenère1916 Playfair1918 Playfair1932 one-time system1955 speech code1973 one-time cipher1977 1916 P. Hitt Man. Solution Mil. Ciphers v. 29 The rail fence cipher, useful as an operators' cipher but permits of no variation and is therefore read almost as easily as straight text when the method is known. 1939 H. F. Gaines Elem. Cryptanal. iii. 12 Passing on to irregular types [of cryptogram], we find these in all degrees of difficulty, from the very simple ‘rail fence’ to the formidable ‘U.S. Army’ double transposition. 1943 J. M. Wolfe First Course Cryptanal. (rev. ed.) II. x. 1 During the Civil War the rail fence transposition was one of the cryptographic systems used as a field cypher. 1990 Sciences July 52/1 The key to the venerable railfence cipher, a simple variety in use for many years, calls for the message to be arranged in a fencelike pattern and then rewritten row by row. < as lemmas |
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