Exempel på cryptanalyst

• He was a cryptanalyst who surfed the government's classified intranet for sensitive information.

• They were sent to Germany to interrogate German cryptanalysts and to examine equipment used in developing codes.

• The more samples of ciphertext that are available, the more information the cryptanalyst has to work with in trying to break a key.

• Finally, in a chosen-ciphertext attack, the cryptanalyst may be able to "choose" ciphertexts and learn their corresponding plaintexts.

• Once every letter in the key is known, the cryptanalyst can simply decrypt the ciphertext and reveal the plaintext.

• Once the length of the keyword is discovered, the cryptanalyst lines up the ciphertext in "n" columns, where "n" is the length of the keyword.

• A cryptanalyst would prepare a crib for comparison with the ciphertext.

• In refining down the set of stops for further examination, the cryptanalyst would eliminate stops that contained such a contradiction.

• The cryptanalyst hypothesised one plugboard interconnection for the bombe to test.

• They settled on one, and agreed to write up a complete design and have it reviewed by another cryptanalyst by the following day.

• In classical cryptography a "null" is intended to confuse the cryptanalyst.

• The message settings should never have been re-used, but on occasion they were, providing a depth, which could be utilised by a cryptanalyst.

• Once a suitable crib had been decided upon, the cryptanalyst would produce a "menu" for wiring up the bombe to test the crib against the ciphertext.

• Provided the message is of reasonable length (see below), the cryptanalyst can deduce the probable meaning of the most common symbols by analyzing the frequency distribution of the ciphertextfrequency analysis.

• Although frequency analysis is a powerful and general technique against many ciphers, encryption has still often been effective in practice, as many a would-be cryptanalyst was unaware of the technique.

• The primary use of padding with classical ciphers is to prevent the cryptanalyst from using that predictability to find cribs that aid in breaking the encryption.

• The basic principle of this sort of enciphering machine is that it should deliver a very long stream of transformations that are difficult for a cryptanalyst to predict.

• Using these relationships, a cryptanalyst could reason from one to another and, potentially, derive a logical contradiction, in which case the rotor setting under consideration could be ruled out.