Lecture 5 Flashcards
What is symmetric encryption?
Same key is used for both encryption and decryption.
What is asymmetric encryption?
Uses a key pair: public and private keys.
What is hybrid encryption?
Combines symmetric and asymmetric methods.
What is a hash function?
Generates a unique, irreversible fingerprint of data.
What is a digital signature?
Encrypted hash verifying sender and data integrity.
What is a certificate authority (CA)?
A trusted party that signs digital certificates.
What is key exchange?
The process of securely sharing encryption keys.
What is PGP?
Software for encrypting emails and files.
What is confidentiality?
Ensuring information is not accessible to unauthorized users.
What is integrity?
Ensuring data has not been altered.
What is authenticity?
Verifying the identity of the sender.
Why is key management important?
Because poor key handling weakens encryption.
