Comparison Table
| Option | Primary difference | Best use |
|---|---|---|
| Hashing | One-way digest | Integrity checks and password verification |
| Encryption | Reversible with key | Confidentiality of data at rest or in transit |
Exam clue: Hashing is not encryption. Do not choose hashing when the original value must be recovered.
How To Use It
Read the scenario for the required outcome. If the requirement is prevention, do not stop at detection. If the requirement is accountability, do not stop at authentication. If the requirement is recovery, distinguish data loss from service downtime.