IGCSE · Computer Science 0478 · Data transmission

Encryption: IGCSE Computer Science questions with answers

Free Encryption questions for IGCSE Computer Science (0478), part of Data transmission. Each question has the answer and the marking points an examiner would look for.

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Encryption practice questions

Question 1Structured · 2 marks
(a)

State what is meant by the term symmetric encryption.

[1]
(b)

State what is meant by the term asymmetric encryption.

[1]
Show answers and mark scheme
PartAnswer and marking pointsMarks
(a)Encryption using the same key to encrypt and decrypt
Encryption using the same key to encrypt and decrypt B1
1
(b)Encryption using a public key to encrypt and a private key to decrypt
Encryption using a public key to encrypt and a private key to decrypt B1
1
Question 2Structured · 2 marks
(a)

State what is meant by the term asymmetric encryption.

[1]
(b)

State what is meant by the term symmetric encryption.

[1]
Show answers and mark scheme
PartAnswer and marking pointsMarks
(a)Encryption using a public key to encrypt and a private key to decrypt
Encryption using a public key to encrypt and a private key to decrypt B1
1
(b)Encryption using the same key to encrypt and decrypt
Encryption using the same key to encrypt and decrypt B1
1

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Original Cambridge-style practice questions written for mentorriyaz.in. These are not Cambridge past paper questions, and this site is not affiliated with or endorsed by Cambridge University Press & Assessment. Updated 2026-11-04. Paper generator · mentorriyaz.in