A cryptographic research team is analyzing the NIST post-quantum standardization process. They note that multivariate cryptography was a candidate family but was not selected. Which reason best explains why multivariate schemes were not selected?

Multivariate schemes had very small key sizes

Multivariate schemes had large signatures and slow verification

Multivariate schemes were based on hash functions

Multivariate schemes were broken by a practical attack

Why might an organization choose a hybrid approach when migrating to post-quantum cryptography?

To ensure that all data is encrypted with quantum key distribution

To eliminate the need for classical cryptography entirely

To reduce the computational overhead of post-quantum algorithms

To maintain compatibility with existing systems while adding quantum resistance

What is the main security assumption behind multivariate polynomial cryptography?

The difficulty of finding short vectors in a lattice

The difficulty of factoring large integers

The difficulty of solving systems of multivariate polynomial equations over finite fields

The hardness of the discrete logarithm problem

What is the primary goal of post-quantum cryptography?

To create cryptographic algorithms that run on quantum computers

To replace all classical cryptography with quantum key distribution

To develop cryptographic algorithms that are secure against quantum computers

To use quantum computers to break existing cryptographic algorithms

EC-CouncilCertified Encryption Specialist

Domain 6Objective 2

Lattice-Based and Post-Quantum Cryptography ECES Practice Questions (Page 9)

Part of the Quantum Computing and Cryptography domain, which makes up ~11% of our current practice bank. EC-Council does not publish an official question count, but from its 120-minute exam (~50–80 total, ~6–9 in this domain), expect 3–5 from this objective — we provide 45 practice questions to prepare you well beyond it. (estimate)

45questions here

9free pages

9concepts

Questions 41–45

41expert · hard
A cryptographic research team is analyzing the NIST post-quantum standardization process. They note that multivariate cryptography was a candidate family but was not selected. Which reason best explains why multivariate schemes were not selected?
Select an answer first
42application · medium
A software vendor must sign firmware updates for IoT devices that have very limited storage for signature verification keys. The vendor wants a NIST-standardized post-quantum signature scheme with the smallest public key size. Which scheme should the vendor select?
Select an answer first
43foundation · easy
Why might an organization choose a hybrid approach when migrating to post-quantum cryptography?
Select an answer first
44foundation · easy
What is the main security assumption behind multivariate polynomial cryptography?
Select an answer first
45foundation · easy
What is the primary goal of post-quantum cryptography?
Select an answer first

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