Hashing Algorithms

Question 1

What is MD5?

Answer 1

Message Digest Algorithm 5, a hashing algorithm creating 128-bit hashes.

Provides: Integrity

Question 2

What is SHA-1?

Answer 2

Secure Hash Algorithm-1, a hashing algorithm creating 160-bit hashes.

Provides: Integrity

Vulnerabilities found: Collisions

Question 3

SHA-2?

Answer 3

Secure Hash Algorithm-2, a hashing algorithm creating 224-, 256-, 384-, or 512 bit hashes. The preferred SHA variant.

Provides: Integrity

Question 4

RIPEMD?

Answer 4

RACE Integrity Primitives Evaluation Message Digest, a family of message digest algorithms

Creates 160-bit hashes, other versions can create 128-, 256-, or 320-bit hashes

Question 5

A “message digest” or “digest” is also known as a what?

Answer 5

hash

Question 6

The original RIPEMD had which vulnerability?

Answer 6

Collisions

Question 7

RIPEMD performs similarly to which hashing algorithm?

Which algorithm is RIPEMD based on?

Answer 7

Performs similarly to SHA-1, but is based on MD4.

Question 8

What are the different variants of RIPEMD?

Answer 8

RIPEMD-128, RIPEMD-256, RIPEMD-320

Question 9

What is HMAC?

Answer 9

Hashing algorithm using a shared secret key. Encrypts a hash. Used with MD5 or SHA1 when used in TLS and IPsec.

Provides: Integrity & Authenticity

Question 10

Which protocols is HMAC used with?

Answer 10

HMAC is used in network encryption protocols such as IPsec and TLS.