CompTIA: Advanced Security Practitioner (CASP) Exam Prep

Answer: C - MD5 is a cryptographic hash function that uses a 128 bit hash and is not resistant to collisions.

Key Takeaway: MD5 is generally nonreversible, but with it not being collision resistant should be thought of as having been broken. In fact, it is unsuitable for uses such as SSL certificates that depend on the lack of collisions in the hash. Most administrators use a more collision resistant algorithm, such as SHA-2 to make hashes of data.