Final answer:
The question deals with using GPUs for password cracking because of their parallel processing capabilities, which allows faster completion of such tasks compared to using CPUs.
Step-by-step explanation:
The subject in question refers to the use of graphics processing units (GPUs) instead of central processing units (CPUs) for the task of password cracking. GPUs are highly efficient at this task because they are designed to handle parallel processing, which is ideal for the brute-force methods often used in password cracking wherein many combinations are tried simultaneously. While CPUs are capable of performing the same tasks, they are limited by fewer cores, meaning they can process fewer operations simultaneously compared to GPUs. Therefore, for tasks like password cracking, which can benefit from parallel processing capabilities, utilizing GPUs can result in a significant speed advantage.