Flashcards
Symmetric Key Encryption
Cards in this deck (4)
- 1Definition of Symmetric Key EncryptionAn encryption scheme where for each pair (e,d) it is easy to determine d knowing only e and to determine e from d, so in practice e=d
- 2Requirement (Strong encryption algorithm)- The attacker knows the algorithm and has access to one or more cipher texts and still not be able to find the key or plain text.
- Attacker should not be able to decrypt the cipher text or find key, even if in possesion of cipher text and plaintext pairs - 3Requirement(sender/receiver keeps key safe in transmission)If someone can discover the key and knows the algorithm, all communication using this key is readable.
- 4Requirement (Algorithm can be public)- We assume that the cipher text can not be decrypted with knowledge of the alogorthim
- Symmetric key encryption is practical for widespread use (low cost chip of encryption algorithms)
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- Flashcards on Symmetric Key Encryption, created by Aaron A Hamilton on 30/12/2014.
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- Aaron A Hamilton
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