Cryptography Test Review

What is the primary purpose of a Public Key Infrastructure (PKI)?

• To manage digital keys and certificates for secure communication

• To store passwords securely

• To encrypt files on a computer

• To provide internet access

Which of the following is NOT a component of Public Key Infrastructure?

• Public keys

• Private keys

• Key escrow

• Password manager

What is the role of a public key in an asymmetric encryption system?

• To decrypt data

• To encrypt data

• To store data

• To delete data

Which key is used to decrypt data in an asymmetric encryption system?

• Public key

• Private key

• Symmetric key

• Master key

Can a public key decrypt data it has encrypted?

• Yes, always

• No, never

• Only sometimes

• Only if authorized

What is the role of a private key in an asymmetric encryption system?

• It encrypts data that can be decrypted by the public key.

• It is used to decrypt data that was encrypted with the public key.

• It is publicly shared and used for encrypting data.

• It is used to encrypt data that can be decrypted by the private key.

Why should a private key be kept secret?

• To ensure it can be used by anyone for encryption.

• To prevent unauthorized decryption of data.

• To allow public access for data encryption.

• To share it with multiple users for decryption.

What is the purpose of key escrow?

• To encrypt data for secure transmission

• To allow a trusted third party to hold a copy of the private key

• To generate new encryption keys

• To provide backup for public keys

Why might key escrow be used?

• To ensure faster data processing

• To prevent unauthorized access to public keys

• As a precautionary measure in case the user loses access to their private key

• To enhance the speed of network connections

What is the primary focus of encryption?

• To increase data size

• To enhance data readability

• To protect confidentiality and privacy

• To reduce data redundancy