Public Key Infrastructure 1.4

Question 1

Describe PUBLIC KEY INFRASTRUCTURE (PKI)

Answer 1

• Provides components necessary for different users and entities to communicate securely.
• Can also be referred to as a certificate.

Question 2

Describe a SYMMETRIC ENCRYPTION

Answer 2

• An encryption that needs all involved parties to have a copy of the same key that that is used for encryption and decryption.
• Shared secret

Question 3

What are the benefits in using SYMMETRIC ENCRYPTION?

Answer 3

• Very fast to use
• Less overhead

Question 4

Describe ASYMMETRIC ENCRYPTION

Answer 4

• Public key cryptography
• A data encryption system that uses two mathematically derived keys to encrypt and decrypt a message.

Question 5

What is a PRIVATE KEY for ASYMMETRIC ENCRYPTION?

Answer 5

• Only available to the owner of the keyl.

Question 6

What is the PUBLIC KEY in ASYMMETRIC ENCRYPTION?

Answer 6

• Used to decrypt data encrypted with the public key
• Cannot derive the private key from the public key.

Question 7

Describe the KEY GENERATION process

Answer 7

• Builds both the public and private key at the same time.
• Involves lots of randomization, large prime numbers, and lots of math.

Question 8

What is the purpose of a KEY ESCROW?

Answer 8

• A system by which your private key is kept by both you and a third party.
• Provides a way to access a person’s encrypted data if that person is no longer present or able to provide access to their private key.