Why do vendors publish MD5 hash values when they provide software patches for their customers
to download from the Internet?

A.
Recipients can verify the software’s integrity after downloading.

B.
Recipients can confirm the authenticity of the site from which they are downloading the patch.

C.
Recipients can request future updates to the software by using the assigned hash value.

D.
Recipients need the hash value to successfully activate the new software.

Explanation:
If the two values are different, Maureen knows that the message was altered, either
intentionally or unintentionally, and she discards the message…As stated in an earlier section, the
goal of using a one-way hash function is to provide a fingerprint of the message. MD5 is the newer
version of MD4. IT still produces a 128-bit hash, but the algorithm is a bit more complex to make it
harder to break than MD4. The MD5 added a fourth round of operations to be performed during
the hash functions and makes several of its mathematical operations carry steps or more
complexity to provide a higher level of security . – Shon Harris All-in-one CISSP Certification Guide
pg 182-185