All of the following are valid cryptographic hash functions EXCEPT:
A. RIPEMD. B. RC4. C. SHA-512. D. MD4.
Correct Answer: B Section: Cryptography
RC4 is not a hash function. RC4 is popular with wireless and WEP/WPA encryption.
A: The RACE Integrity Primitives Evaluation Message Digest (RIPEMD) algorithm was based on MD4 hashing algorithm.
C: The Secure Hash Algorithm (SHA) was designed to ensure the integrity of a message. SHA is a one-way hash that provides a hash value that can be used with an encryption
protocol. This algorithm produces a 160-bit hash value. SHA-2 has several sizes: 224, 256, 334, and 512 bit.
D: The Message Digest Algorithm (MD) also creates a hash value and uses a one-way hash. The hash value is used to help maintain integrity. There are several versions of MD; the
most common are MD5, MD4, and MD2.
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 251, 255-256