COMPUTER FUNDAMENTALS

COMPUTER ETHICS AND SECURITY

CRYPTOGRAPHY AND ENCRYPTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which cryptographic attack relies on the concepts of probability theory?
A
KPA
B
Brute-force
C
Dictionary
D
Birthday
Explanation: 

Detailed explanation-1: -A birthday attack is a type of cryptographic attack, which exploits the mathematics behind the birthday problem in probability theory. Birthday attack can be used in communication abusage between two or more parties.

Detailed explanation-2: -A birthday attack is a form of cryptographic attack that cracks mathematical algorithms by looking for matches in the hash function. The strategy relies upon the birthday paradox via which the probability of sharing one birthday with two persons is significantly larger than it appears.

Detailed explanation-3: -Birthday Problem Applied To Hashing Functions That means that you stand a 50% chance of finding an MD5 collision (sample space of 2^128 possibilities) after around 2^64 operations and a 50% chance of finding an SHA-1 collision (sample space of 2^160 possibilities) after around 2^80 operations.

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