Crucial Exams

Certified Ethical Hacker (CEH) Practice Question

During a red team engagement, you capture two HTTPS application-layer payloads protected by a proprietary stream cipher whose initialization vector was mistakenly hard-coded. Because both ciphertexts were generated with the same keystream, which cryptanalytic technique should you apply offline to recover significant portions of the original plaintexts?

  • Launch a meet-in-the-middle brute force against the cipher's key schedule

  • Apply differential cryptanalysis to pairs of successive cipher blocks

  • XOR the ciphertexts and use crib-dragging to exploit a two-time pad keystream reuse

  • Measure decryption response times to build a timing oracle attack

Certified Ethical Hacker (CEH)
Cryptography
Your Score:
Settings & Objectives
Random Mixed
Questions are selected randomly from all chosen topics, with a preference for those you haven’t seen before. You may see several questions from the same objective or domain in a row.
Rotate by Objective
Questions cycle through each objective or domain in turn, helping you avoid long streaks of questions from the same area. You may see some repeat questions, but the distribution will be more balanced across topics.

Check or uncheck an objective to set which questions you will receive.

Wipe Score
Bash, the Crucial Exams Chat Bot
AI Bot