Crucial Exams

ISC2 CISSP Practice Question

A security analyst is examining an encrypted message intercepted from a suspected espionage operation. The message appears to use a classical cipher, and the analyst begins counting symbol occurrences and comparing their distribution patterns against standard language statistics. Which cryptanalytic attack method is the analyst MOST likely employing?

  • Side-channel attack

  • Known plaintext attack

  • Frequency analysis

  • Brute force attack

ISC2 CISSP
Security Architecture and Engineering
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