Flashcards
Cryptanalysis and brute force attack
Cards in this deck (6)
- 1Brute Force Attack- Attacker tries all possible keys on a cipher text until a legible plaintext is obtained (this is always possible unless unknown language)
- On avergae, half of all possible keys need to be tried in order to achieve success (cost heavily depends on key size) - 2Cryptanalytic attack- Attack relies on the nature of the algorithm, can also rely on knowledge of plain text or cipher text pairs
- Exploits the characteristics of the alogrithm to deduce a specific plaintext or key - 3Adversary (input)Whatever the adversary knows from the beginning
- 4Adversary (Oracle)Models information adversary could obtain during the attack
- 5Adversary (output)Whatever the adversary is looking to compute, key, plaintext, information
- 6Definition (security)- Specify potential oracle
- Define what the adversary needs to do to be successful
- The system is secure if with an efficient adversary there is negligable chance of them winning
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- Flashcards on Cryptanalysis and brute force attack, created by Aaron A Hamilton on 30/12/2014.
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- Aaron A Hamilton
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