# Q4(b) · Cryptographic attack models

Subject: Computer Networks

Exam: TEE

Reader: https://deep-learning-study-room.vercel.app/cn/#tee/papers/paper-2024-feb-ai-reexam/q4b

Canonical: https://deep-learning-study-room.vercel.app/read/cn/tee/papers/paper-2024-feb-ai-reexam--q4b/

Exact historical variant. Current-syllabus questions solved; excluded topics and source limitations stated.

### Q4(b). An intruder has an encrypted message and its decrypted version. Can the intruder mount ciphertext-only, known-plaintext or chosen-plaintext attacks? [5 marks]

### Answer

This historical topic is not named in the current six-unit syllabus. It is recorded for a complete paper inventory, but excluded from the required preparation and current-unit mark totals.