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CYG Chapter 3 Cryptanalysis of Classical Systems

Questions about the lecture 'Cryptography' of the RWTH Aachen Chapter 3 Cryptanalysis of Classical Systems

Questions about the lecture 'Cryptography' of the RWTH Aachen Chapter 3 Cryptanalysis of Classical Systems


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Sprache English
Kategorie Informatik
Stufe Universität
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What is ‘Kerckhoffs’ principle’?

[cryptanalysis]

“The security of a cryptosystem shall not be based on the premise that the system itself is unknown to an opponent.”

What is the assumption?

[levels.cryptanalysis]

Oskar knows about the cryptosystem except of the key

What are the attacks?

[levels.cryptanalysis, 4]

1. CO

2. KP

3. CP

4. CC

What is the definition?

[CO.levels.cryptanalysis]

Only a string of ciphertext

What is the definition?

[KP.levels.cryptanalysis]

A string of ciphertext and the corresponding plaintext

What is the definition?

[CP.levels.cryptanalysis]

Access to the encryption function for any plaintext

What is the definition?

[CC.levels.cryptanalysis]

Access to the decryption function for any ciphertext

Which attacks are minimal requirements for a cryptosystem?

[levels.cryptanalysis, 2]

1. CO and 2. KP