Question

A form of cryptanalysis applicable to symmetric key algorithms. This was invented by Eli Biham and Adi Shamir. The examination of differences in an input and how that affects the resultant differences in the output.

A) Symmetric Analysis
B) Differential Cryptanalysis
C) Biham-Shamir Method
D) Cryptographic Examination

Answer 1

Differential Cryptanalysis, invented by Eli Biham and Adi Shamir, is a cryptanalysis method used against symmetric key algorithms, analyzing input differences to infer the secret key.

Step-by-step explanation:

The form of cryptanalysis you are referring to is B) Differential Cryptanalysis. This method was indeed invented by Eli Biham and Adi Shamir. Differential cryptanalysis is a technique where an attacker examines the differences in the input of a cryptographic algorithm and observes how these differences affect the resultant output. By analyzing these patterns, the attacker can potentially deduce the secret key used for encryption.

This method is particularly applicable to block ciphers, which are a type of symmetric key algorithm. It's important to note that differential cryptanalysis requires a significant amount of skill and computational resources, making it a sophisticated form of attack. Despite this many modern encryption algorithms have been designed to be resistant to differential cryptanalysis thanks to the work of cryptography researchers like Biham and Shamir.