Practice Flashcards: A-Level Computer Science: Security, Data and Consequences | Zestly

Question 1

Symmetric encryption

Accepted Answer

A method where the same key is used for both encryption and decryption. The mistake often made is assuming it is suitable for secure key exchange between parties who have not met.

Question 2

Asymmetric encryption

Accepted Answer

A method using a public key for encryption and a private key for decryption. The mistake often made is believing it is simply a stronger version of symmetric encryption rather than a different tool for key distribution.

Question 3

Public key

Accepted Answer

A key that can be shared openly to allow others to encrypt data for the owner. The mistake often made is thinking it can be used to decrypt the data it encrypted.

Question 4

Private key

Question 5

Hash function

Question 6

Salt

Question 7

Digital certificate

Question 8

Parameterised query

Question 9

Validation

Question 10

Authentication

Question 11

Authorisation

Question 12

Data minimisation