cryptography

What does the term "key exchange" mean in cryptography?

• Sharing of encrypted data

• Sharing of cryptographic keys between parties

• Swapping public keys for private keys

• Changing encryption algorithms during communication

Which of the following ensures confidentiality of a message?

• Hashing

• Encryption

• Digital signatures

• Salting

In symmetric encryption, the same key is used for:

• Encryption only

• Decryption only

• Both encryption and decryption

• Key generation

What is the purpose of a message authentication code (MAC)?

• Encrypt data

• Authenticate the sender and verify integrity

• Create digital certificates

• Generate random keys

What is a primary characteristic of a one-way hash function?

• It can be reversed to obtain the original data

• It produces fixed-length output for variable-length input

• It uses symmetric keys

• It requires high computational power

Which of the following is NOT a characteristic of public-key cryptography?

• Scalability

• Secure key distribution

• High speed

• Asymmetry

Which of the following is a weakness of symmetric key cryptography?

• Key distribution

• Complexity of the algorithm

• Low speed

• High storage requirements

Which security principle ensures that data is not altered during transmission?

• Confidentiality

• Integrity

• Availability

• Anonymity

. What is the primary purpose of two-factor authentication?

• To encrypt data

• To provide an additional layer of security

• To prevent phishing attacks

• To generate digital signatures

What is the primary goal of network security?

• To ensure that only authorized users have access to the network

• To optimize the speed of data transfer

• To develop new network protocols

• To prevent all types of network traffic