Which of the following did the developer MOST likely im…

A new client application developer wants to ensure that the encrypted passwords that are stored in their
database are secure from cracking attempts. To implement this, the developer implements a function on the
client application that hashes passwords thousands of times prior to being sent to the database. Which of the
following did the developer MOST likely implement?

A.
RIPEMD

B.
PBKDF2

C.
HMAC

D.
ECDHE

Explanation:
Password-Based Key Derivation Function 2 (PBKDF2) makes use of a hashing operation, an encryption cipher
function, or an HMAC operation) on the input password, which is combined with a salt and is repeated
thousands of times.