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John works as a cryptography consultant. He finds that people often misunderstand the reality of breaking a cipher .
What is the definition of breaking a cipher?
- A . Finding any method that is more efficient than brute force
B. Uncovering the algorithm used
C. Rendering the cypher no longer useable
D. Decoding the key
Suggested Answer: A
Explanation:
Finding any method that is more efficient than brute force.
https://en.wikipedia.org/wiki/Cryptanalysis
Bruce Schneier notes that even computationally impractical attacks can be considered breaks: "Breaking a cipher simply means finding a weakness in the cipher that can be exploited with a complexity less than brute force. Never mind that brute-force might require 2^128 encryptions; an attack requiring 2^110 encryptions would be considered a break...simply put, a break can just be a certificational weakness: evidence that the cipher does not perform as advertised."
Explanation:
Finding any method that is more efficient than brute force.
https://en.wikipedia.org/wiki/Cryptanalysis
Bruce Schneier notes that even computationally impractical attacks can be considered breaks: "Breaking a cipher simply means finding a weakness in the cipher that can be exploited with a complexity less than brute force. Never mind that brute-force might require 2^128 encryptions; an attack requiring 2^110 encryptions would be considered a break...simply put, a break can just be a certificational weakness: evidence that the cipher does not perform as advertised."
Posted : 09/02/2023 1:24 pm