GCGA Ch. 10 Providing Integrity with Hashing (ST)

Question 1

Hashing & Hashes

Answer 1

Hashing verifies the integrity of data, such as downloaded files and email messages. A hash is a fixed-length string of hexadecimal characters, which cannot be reversed to re-create the original data.

Question 2

Checksum

Answer 2

similar to a hash but is typically smaller. It is used to verify the integrity of data but is not intended to be cryptographically secure.

Question 3

Hashing algorithms

Answer 3

one-way functions used to create a hash. You cannot reverse the process to re-create the original data.

Question 4

Hash collision

Answer 4

occurs when a hashing algorithm creates the same hash from different inputs.

Question 5

Common hashing algorithms

Answer 5

Message Digest 5 (MD5), Secure Hash Algorithms (SHA), and Hash-based Message Authentication Code (HMAC). HMAC provides both integrity and authenticity of a message.