Security P3 Flashcards
What is encryption?
The process of converting data into an unreadable format
What is plain text?
Data before applying encryption
What is cipher text?
Data after applying encryption
What is the purpose of key encryption?
To ensure authenticity
What is a public key?
A shared key used to encrypt data that is decrypted with its matching private key
What is a private key?
A secret key used to decrypt data encrypted with its matching public key
What is symmetric encryption?
An encryption method using the same key for encryption and decryption
What is a disadvantage of symmetric encryption?
Key must be securely exchanged and once compromised
Can symmetric encryption verify the origin of data?
No
What is asymmetric encryption?
An encryption method using two keys: one public and one private
Which key is used to encrypt a message in asymmetric encryption?
The public key
Which key is used to decrypt a message in asymmetric encryption?
The private key
How many keys are used in symmetric encryption?
1 key for both encryption and decryption
How many keys are used in asymmetric encryption?
2 keys: public and private
Is the key shared in symmetric encryption?
Yes
Is the key shared in asymmetric encryption?
Only the public key
Which is more secure: symmetric or asymmetric encryption?
Asymmetric
Which is faster: symmetric or asymmetric encryption?
Symmetric
Which uses shorter keys: symmetric or asymmetric encryption?
Symmetric
What is confidentiality in data transmission?
Only the intended recipient can decrypt the message
What is authenticity in data transmission?
Receiver must know who sent the message
What is integrity in data transmission?
Message must not be altered during transmission
What is non-repudiation in data transmission?
Neither party can deny involvement in the communication
What is quantum cryptography?
An encryption method using quantum properties of photons for ultra-secure communication
