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Data transmission: encryption (symmetric, asymmetric, public and private keys, SSL/TLS)
Practice Questions

40 CIE IGCSE Computer Science questions on Data transmission: encryption (symmetric, asymmetric, public and private keys, SSL/TLS), each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Data transmission: encryption (symmetric, asymmetric, public and private keys, SSL/TLS).

Try 2 sample questions on Data transmission: encryption (symmetric, asymmetric, public and private keys, SSL/TLS)

Question 1 · 1 mark · Difficulty 1/3

What is plaintext?

  1. The readable data before encryption is applied
  2. The scrambled data produced by encryption
  3. The key used to encrypt the data
  4. Data that can never be encrypted
Show answer & explanation
✓ Answer: A — The readable data before encryption is applied
Award 1 mark. Once encrypted it becomes ciphertext, which is unintelligible without the correct key.
Question 2 · 1 mark · Difficulty 1/3

What is ciphertext?

  1. A message written without any punctuation
  2. The scrambled output produced when plaintext is encrypted
  3. The algorithm used to perform the encryption
  4. The password protecting a user account
Show answer & explanation
✓ Answer: B — The scrambled output produced when plaintext is encrypted
Award 1 mark. It can be intercepted but not understood without the key needed to decrypt it.
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20 questions · 25 min · free

CIE IGCSE Computer Science: Data transmission: encryption (symmetric, asymmetric, public and private keys, SSL/TLS) FAQ

Is Kramizo free for CIE IGCSE students preparing for Computer Science?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Data transmission: encryption (symmetric, asymmetric, public and private keys, SSL/TLS) practice with other Computer Science topics or even switch to a totally different CIE subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Data transmission: encryption (symmetric, asymmetric, public and private keys, SSL/TLS) questions aligned to the official CIE IGCSE Computer Science syllabus?
Every question is written against the published CIE IGCSE Computer Science specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CIE paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CIE.
How is Data transmission: encryption (symmetric, asymmetric, public and private keys, SSL/TLS) typically tested on CIE IGCSE Computer Science papers?
Data transmission: encryption (symmetric, asymmetric, public and private keys, SSL/TLS) appears across multiple question types on real CIE IGCSE Computer Science papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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