Matthew Russell Crank Provide a powerful and extensible environment for solving classical ciphers
Download

Matthew Russell Crank Ranking & Summary

Matthew Russell Crank Tags

zuma deluxe full russell brand carambis driver updater docx reader free lie spy download jet defrag commentary on matthew jack russell terrier matthew edison bremer russell food diary template russell athletic

Matthew Russell Crank Description

Crank, or the "CRyptANalysis toolKit", is a program designed to provide automated cryptanalysis of classical pen and paper cryptosystems (an example of which might be the Caesar cipher, where each letter is substituted by the letter three places along in the alphabet). Because the mechanisms for decryption (authorised or otherwise) are Similar to encryption, Crank also doubles as a cryptographic typewriter, where you can see messages being encrypted on the fly as you type. When attempting an automated attack, the task is viewed as an optimisation problem. The quantity to be optimised is the "plaintextness" of the, er, PlainText, the latter being computed from the ciphertext using an instance of a cryptographic system. This instance is a transformation (called a "transform" by Crank), usually specified by a key, that maps a text string to another text string. The optimiser works over the space of keys of the transformation, trying to increase the "plaintextness", or in Crank terminology, "fitness" of the resultant candidate decrypted plaintext. The method the optimiser uses to search the keyspace is called the "heuristic". The purpose of Crank is therefore twofold; first, to provide a Library of transform, fitness and heuristic "componants", and second to allow them to be combined together and used in the cryptanalysis of a cryptogram.

Matthew Russell Crank Related Software