Symmetric vs Asymmetric Encryption (OCR A-Level Computer Science): Flashcards
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Practise the cards
15 cards from this deck
What is encryption?
What is encryption?
Converting data to coded form to prevent unauthorised access
What does encryption ensure?
What does encryption ensure?
Confidentiality and data integrity
Keys used in symmetric encryption
Keys used in symmetric encryption
Single key for both encryption and decryption
Examples of symmetric encryption algorithms
Examples of symmetric encryption algorithms
AES and DES
Speed: symmetric vs asymmetric
Speed: symmetric vs asymmetric
Symmetric is faster than asymmetric
Main disadvantage of symmetric encryption
Main disadvantage of symmetric encryption
Key distribution problem - key must be shared securely
Key types in asymmetric encryption
Key types in asymmetric encryption
Public key and private key
Examples of asymmetric encryption algorithms
Examples of asymmetric encryption algorithms
RSA and ECC
Asymmetric advantage re: key distribution
Asymmetric advantage re: key distribution
No need to securely distribute a shared key
Asymmetric disadvantage re: speed
Asymmetric disadvantage re: speed
Slower and computationally more intensive
Asymmetric encryption authentication feature
Asymmetric encryption authentication feature
Digital signatures
Protocol using asymmetric encryption for websites
Protocol using asymmetric encryption for websites
SSL/TLS
What hybrid encryption combines
What hybrid encryption combines
Symmetric and asymmetric encryption
Best encryption type for large files
Best encryption type for large files
Symmetric encryption (e.g., AES)
Best encryption for secure online messages
Best encryption for secure online messages
Asymmetric encryption (e.g., RSA)