Which one of the following conditions is NOT necessary for a long dictionary attack to succeed?

A.
The attacker must have access to the target system.

B.
The attacker must have read access to the password file.

C.
The attacker must have write access to the password file.

D.
The attacker must know the password encryption mechanism and key variable.

Explanation:

The program encrypts the combination of characters and compares them to the encrypted entries
in the password file. If a match is found, the program has uncovered a password. – Shon Harris
All-in-one CISSP Certification Guide pg 199