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A type of frequency analysis used to attack polyalphabetic substitution ciphers. It's used to try to discover patterns and use that information to decrypt the cipher.

A.
Kasiski Method
Answers
A.
Kasiski Method
B.
Birthday Attack
Answers
B.
Birthday Attack
C.
Information Deduction
Answers
C.
Information Deduction
D.
Integral Cryptanalysis
Answers
D.
Integral Cryptanalysis
Suggested answer: A

Explanation:

Kasiski Method

https://en.wikipedia.org/wiki/Kasiski_examination

In cryptanalysis, Kasiski examination (also referred to as Kasiski's test or Kasiski's method) is a method of attacking polyalphabetic substitution ciphers, such as the Vigenre cipher. It was first published by Friedrich Kasiski in 1863, but seems to have been independently discovered by Charles Babbage as early as 1846.

Incorrect answers:

Integral Cryptanalysis - uses lots of sets of plaintext that are similar with slight modifications. These are encrypted and then the variations are analyzed to determine if there's anything that can be zeroed in on.

Information Deduction - the attacker gains some Shannon information about plaintexts (or ciphertexts) not previously known.

Birthday Attack - cryptographic attack that exploits the mathematics behind the birthday problem in the probability theory forces collisions within hashing functions.

asked 18/09/2024
VEDA VIKASH Matam Shashidhar
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