312-50V10 Question #166: Real Exam Question with Answer & Explanation

The correct answer is D: Collision. A collision in cryptography is when two distinct input values produce the same hash digest output.

Cryptography

Question

There are several ways to gain insight on how a cryptosystem works with the goal of reverse engineering the process. A term describes when two pieces of data result in the value is?

Options

APolymorphism
BEscrow
CCollusion
DCollision

Explanation

A collision in cryptography is when two distinct input values produce the same hash digest output.

Common mistakes.

A. Polymorphism refers to malware or code that changes its own signature or form while retaining its function, and has no relation to two inputs producing the same hash value.
B. Key escrow is an arrangement where encryption keys are held by a trusted third party for recovery purposes, not a property describing equivalent hash outputs from different inputs.
C. Collusion describes cooperative deception between two or more parties - such as sharing secrets to undermine a security policy - and is a behavioral concept rather than a cryptographic hash function property.

Concept tested. Cryptographic hash collision definition and impact

Reference. https://csrc.nist.gov/glossary/term/collision

Topics

#hash collision#cryptographic hash#collision attack#reverse engineering

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