012_Public Key Infrastructure - CompTIA Security+ Sy0-701 - 1.4

In asymmetric encryption, what is the role of the public key?

• It is used to encrypt data

• It is used to decrypt data

• It is used to sign data

• It is used to generate a private key

What does PKI stand for in the context of cryptography?

• Public Key Infrastructure

• Private Key Integration

• Public Key Interchange

• Private Key Infrastructure

What is the primary advantage of using asymmetric encryption over symmetric encryption?

• It allows secure communication without sharing a secret key.

• It is faster than symmetric encryption.

• It requires less computational power.

• It uses the same key for encryption and decryption.

How does the use of large prime numbers contribute to the security of asymmetric encryption?

• It increases the difficulty of factoring the keys.

• It speeds up the encryption process.

• It allows for longer key lengths without increasing complexity.

• It makes the encryption algorithm easier to break.

Explain why symmetric encryption might pose scalability issues in large networks.

• Because the same key must be shared among all users, increasing the risk of key compromise

• Because symmetric encryption requires more computational power than asymmetric encryption

• Because it allows for unlimited users without any key management

• Because it is less secure than asymmetric encryption in all scenarios

Discuss the implications of a compromised private key in a PKI system.

• It allows unauthorized users to decrypt data.

• It enhances the security of the system.

• It prevents legitimate users from accessing their data.

• It has no impact on the system.

Which of the following is a characteristic of symmetric encryption?

• Uses two different keys for encryption and decryption

• Uses the same key for both encryption and decryption

• Requires a Certificate Authority for operation

• Is slower than asymmetric encryption

Evaluate the effectiveness of using a third-party key management service in a large organization.

• It centralizes key management, reducing the risk of key loss.

• It increases the complexity of key management processes.

• It eliminates the need for any internal security measures.

• It requires constant internet access for key retrieval.

How does a Certificate Authority (CA) contribute to the trust model in PKI?

• By verifying the identity of entities and issuing digital certificates

• By providing encryption algorithms for secure communication

• By managing user passwords and access controls

• By creating firewalls to protect network traffic

Describe a scenario where key escrow might be necessary in an organization.

• When an organization wants to ensure data can be decrypted even if the original user is unavailable

• When an organization needs to prevent unauthorized access to sensitive information

• When an organization wants to enhance its data encryption methods

• When an organization is required to share data with third parties for compliance purposes