a cryptanalyst to quickly detect that form of encryption. The index of coincidence provides a measure of how likely it is to draw two matching letters...

emphasize the index of coincidence to an absurd level, the two example messages above consist entirely of the letter "A", so the coincidences occur at every...

the 1920s by William F. Friedman, who used the index of coincidence, which measures the unevenness of the cipher letter frequencies to break the cipher...

more a literary device than anything significant cryptographically. Index of coincidence Topics in cryptography Zipf's law A Void, a novel by Georges Perec...

or index of coincidence analysis will not work on the ciphertext, unlike for similar ciphers that use a single repeated key. A crucial weakness of the...

Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter...

The coincidence of wants (often known as double coincidence of wants)[verification needed] is an economic phenomenon where two parties each hold an item...

Good • Illegal prime • Impossible differential cryptanalysis • Index of coincidence • Indifferent chosen-ciphertext attack • Indistinguishability obfuscation...

use of symbols rather than letters, the use of which fails to assist in curbing cryptanalysis. Additionally, the prominence and recognizability of the...

strings may just be coincidence, so that some of the repeat distances are misleading. The cryptanalyst has to rule out the coincidences to find the correct...