15.4 - Cryptanalysis and Cryptographic Attack Countermeasures

 15.4 - Cryptanalysis and cryptographic attack countermeasures 

 

Key Terms: 

  • Linear cryptanalysis – A method for finding the affine approximations to the action of a cipher. 

  • Differential cryptanalysis – A method that works on statistical differences between ciphertexts of chosen data. 

  • Integral cryptanalysis – An attack that is useful against block ciphers based on substitution-permutation networks. 

  • Frequency analysis – The study of the frequency of letters or groups of letters in a ciphertext. 

  • One-time pad – A cryptography method that contains many non-repeating, randomly chosen groups of letters or numbers. 

 

Cryptography Attacks 

Cryptography attacks use many methods. A hacker may try to exploit a weakness in the code, cipher, protocol or try to attack key management. Statistical analysis can also be used to crack encryption and view sensitive data. 

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