transposition cipher

25 examples (0.03 sec)
• Info 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 constitutes a permutation of the plaintext. more...
• One of his first challenges was to phase out double transposition ciphers using keys based on preselected poems.
• It's what they call a transposition cipher. Cited from The Secret Wireless, by Lewis E. Theiss
• In a transposition cipher, the letters themselves are kept unchanged, but their order within the message is scrambled according to some well-defined scheme.
• Many transposition ciphers are done according to a geometric design.
• Yet, grilles provided seed ideas for transposition ciphers that are reflected in modern cryptography.
• The later variants of the Cardano grille present problems which are common to all transposition ciphers.
• Another form of transposition cipher uses grilles, or physical masks with cut-outs, rather than a mathematical algorithm.
• During World War I, the German military used a double columnar transposition cipher, changing the keys infrequently.
• In a transposition cipher, the units of the plaintext are rearranged in a different and usually quite complex order, but the units themselves are left unchanged.
• The device made the solutions of a single transposition (Transposition cipher) easy.
• Many transposition ciphers are similar to these two examples, usually involving rearranging the letters into rows or columns and then taking them in a systematic way to transpose the letters.
• Classical ciphers are often divided into transposition ciphers and substitution ciphers.
• The Rail Fence cipher is a form of transposition cipher that gets its name from the way in which it is encoded.
• Trying to find this permutation is essentially the same problem encountered when analysing a columnar transposition cipher: multiple anagramming.
• The players face simple substitution and transposition ciphers, graphic and multimedia ciphers, object with the clue hidden inside that must be destroyed, and more.
• Many anti-Stratfordians search for hidden messages in the form of acrostics and transposition ciphers, although this approach is not so popular with Marlovians.
• Gaines, in her standard work on hand ciphers and their cryptanalysis, gave a lengthy account of transposition ciphers, and devoted a chapter to the turning grille.
• In fact, the code was a fractionating transposition cipher based on a substitution table of 100 groups of two figures each followed by a columnar transposition.
• With even a small amount of known or estimated plaintext, simple polyalphabetic substitution ciphers and letter transposition ciphers designed for pen and paper encryption are easy to crack.
• Lidenbrock attempts a decipherment, deducing the message to be a kind of transposition cipher; but his results are as meaningless as the original.