Password Breaking Algorithm of Single Table Replacement Based on Frequency of Letters
WU Junbin
WU Sheng
WU Xingjiao
Abstract：Replace cryptographic methods can be divided according to the encryption constitute a shift ,affine ,random categories .This paper replacement formula to decipher the encrypted ciphertext solvd mainly rely on the frequency distribu‐tion of the letters .For rotate each shift using the comparative statistics letters to determine the number of shifts plural on this basis so as the final number of shifts .For affine ,random ,you can not simply get all the various shifts in the number of locations .Only on this basis ,therefore ,the characteristics of high stability based on a large sample of data to determine the probability and statistics ranking the first two characters in the first two characters in the corresponding text appears .On this basis ,the use of more than Euclid removed except Solving affine .Random encryption is used to find the data dictionary analysis .Finally get decrypted plaintext .The final result is solved for the shift ,affine since the encryption is relatively sim‐ple to solve and change regularly so high accuracy rate ,and need to compare a random basis ,and therefore have a greater speed and accuracy uncertainty ,while demand time than long .
Keywords：replace encryptioncipher decodingletters statistical ruleEuclidean algorithmshift encryption
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 583-585,634 )