Comparison Table
| Option | Primary difference | Best use |
|---|---|---|
| Symmetric | Same key encrypts and decrypts | Bulk data protection |
| Asymmetric | Public/private key pair | Key exchange, signatures, certificates |
Exam clue: Use the property needed: confidentiality, integrity, authenticity, or non-repudiation.
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.