Bezmaksas piegāde pasūtījumiem virs 29€

  • check 10+ miljoni grāmatu
  • check Jaunumi katru dienu
  • check Vairāk nekā 1 miljons klientu mums uzticas
  • check Labas cenas un atlaides
  • check Piegāde visā Eiropā

Two-square cipher: Encryption, Symmetric-Key Algorithm, Playfair Cipher, Frequency Analysis, Four-Square Cipher, Cryptanalysis, Outline of Cryptography, Substitution Cipher -

angļu valoda
2026-03-20
116,87 € 166,96 €

-30% ar kodu BOOKS

Piegādātāja noliktavā

Piegāde 15-21 darba dienu laikā

30 dienu atgriešanas politika

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Two-square cipher is a manual symmetric encryption technique. It was developed to ease the cumbersome nature of the large encryption/decryption matrix used in the four-square cipher while still being slightly stronger than the Playfair cipher.The technique encrypts pairs of let ... Pilns apraksts

Jums varētu patikt arī

Aprašymas

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Two-square cipher is a manual symmetric encryption technique. It was developed to ease the cumbersome nature of the large encryption/decryption matrix used in the four-square cipher while still being slightly stronger than the Playfair cipher.The technique encrypts pairs of letters (digraphs), and thus falls into a category of ciphers known as polygraphic substitution ciphers. This adds significant strength to the encryption when compared with monographic substitution ciphers which operate on single characters. The use of digraphs makes the two-square technique less susceptible to frequency analysis attacks, as the analysis must be done on 676 possible digraphs rather than just 26 for monographic substitution. The frequency analysis of digraphs is possible, but considerably more difficult - and it generally requires a much larger ciphertext in order to be useful.

Vairāk informācijas

Izdevējs OmniScriptum
Izlaides gads 2026
Vāka tips Mīkstais vāks
EAN 9786130354688
Rakstiet savu atsauksmi
Jūs vērtējat: Two-square cipher: Encryption, Symmetric-Key Algorithm, Playfair Cipher, Frequency Analysis, Four-Square Cipher, Cryptanalysis, Outline of Cryptography, Substitution Cipher
Jūsu novērtējums:

Goodreads atsauksmes

116,87 € 166,96 €