Neco 2018 Computer Studies Question 14

Practice objective / multiple choice question 14 from the 2018 Neco Computer Studies examination.

Neco 2018 Computer Studies Objective / Multiple Choice Medium Difficulty
Question 14 NECO • 2018 • COMPUTER_STUDIES • objective

A symmetric‑key encryption algorithm uses a 128‑bit key. An attacker can test \(2^{30}\) keys per second. Estimate how many years it would take to exhaust the entire key space by brute‑force, and state whether this time is less than, equal to, or greater than one year.

Answer Options

A. Approximately 9.4×10^{21} years (less than one year)
Correct Answer B. Approximately 9.4×10^{21} years (greater than one year)
C. Approximately 5.0×10^{22} years (greater than one year)
D. Approximately 1.2×10^{9} years (greater than one year)
Correct Answer
B
Correct Option:
Approximately 9.4×10^{21} years (greater than one year)

About This Question

This is Neco 2018 Computer Studies Question 14. It is one of the objective questions from the 2018 Neco Computer Studies examination.

Difficulty level: Medium .

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