GCGA Ch. 10 Introducing Cryptography Concepts (ST)

Question 1

Integrity

Answer 1

provides assurances that data has not been modified. Hashing ensures that data has retained integrity.

Question 2

Symmetric encryption

Answer 2

uses the same key to encrypt and decrypt data.

Question 3

Asymmetric encryption

Answer 3

uses two keys (public and private) created as a matched pair.

Question 4

Digital signature

Answer 4

provides authentication, non-repudiation, and integrity. Users sign emails with a digital signature, which is a hash of an email message encrypted with the sender’s private key. Only the sender’s public key can decrypt the digital signature which reveals hash, providing verification the hash was encrypted with the sender’s private key.

Question 5

Authentication

Answer 5

validates an identity.

Question 6

Non-repudiation

Answer 6

prevents a party from denying an action.

Question 7

Confidentiality

Answer 7

ensures that data is only viewable by authorized users. Encryption protects the confidentiality of data.