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Cosa (chi) è cryptology$500515$ - definizione

WIKIMEDIA LIST ARTICLE
Clock (cryptology)
  • Enigma rotors. Turnover notch can be seen in left rotor near 13. Right rotor marking near center shows it is rotor II.

Chaotic cryptology         
Chaotic Cryptology
Chaotic cryptology is the application of the mathematical chaos theory to the practice of the cryptography, the study or techniques used to privately and securely transmit information with the presence of a third-party or adversary. Since first being investigated by Robert Matthews in 1989,"On the derivation of a “chaotic” encryption algorithm.
Journal of Cryptology         
JOURNAL
Journal of cryptology; J Cryptology; J. Cryptology; J Cryptol; J. Cryptol.
The Journal of Cryptology () is a scientific journal in the field of cryptology and cryptography. The journal is published quarterly by the International Association for Cryptologic Research.
cryptology         
  • French]] cipher machine, with arms of [[Henri II of France]]
  • [[Poznań]] monument (''center'') to Polish cryptanalysts whose breaking of Germany's Enigma machine ciphers, beginning in 1932, altered the course of World War II
  • First page of a book by [[Al-Kindi]] which discusses encryption of messages
  • 1=''k'' = 3}}. In other words, the letters in the alphabet are shifted three in one direction to encrypt and three in the other direction to decrypt.
  • [[Whitfield Diffie]] and [[Martin Hellman]], authors of the first published paper on public-key cryptography.
  • Enciphered letter from [[Gabriel de Luetz d'Aramon]], [[French Ambassador to the Ottoman Empire]], after 1546, with partial decipherment
  • Cipher Bureau]], for 7 years before the war, and subsequent decryption at [[Bletchley Park]], was important to Allied victory.<ref name="kahnbook" />
  • PGP]] and OpenPGP compatible software for time-efficient encryption of messages
  • NSA headquarters in Fort Meade, Maryland
  • In this example the message is only signed and not encrypted.
1) Alice signs a message with her private key.
2) Bob can verify that Alice sent the message and that the message has not been modified.
  • Public-key cryptography, where different keys are used for encryption and decryption.
  • Reconstructed [[ancient Greek]] ''[[scytale]]'', an early cipher device
  • Symmetric-key cryptography, where a single key is used for encryption and decryption
PRACTICE AND STUDY OF SECURE COMMUNICATION TECHNIQUES
CryptologY; CryptographY; Cryptology; Cryptographer; Cryptographic; Codes and ciphers; Cyptography; Computer Cryptology; Cryptography Classification; Cryptography Notes; Cryptographic systems; Declarative Security System; Cryptographic Systems; Secret code; Code making; Polygraphia; Applied cryptography; Kriptografia; Mathematical cryptography; Cryptographically; Lightweight cipher
¦ noun the study of codes, or the art of writing and solving them.
Derivatives
cryptological adjective
cryptologist noun

Wikipedia

Clock (cryptography)

In cryptography, the clock was a method devised by Polish mathematician-cryptologist Jerzy Różycki, at the Polish General Staff's Cipher Bureau, to facilitate decrypting German Enigma ciphers. The method determined the rightmost rotor in the German Enigma by exploiting the different turnover positions. For the Poles, learning the rightmost rotor reduced the rotor-order search space by a factor of 3 (the number of rotors). The British improved the method, and it allowed them to use their limited number of bombes more effectively (the British confronted 5 to 8 rotors).