Cryptography Practice Questions

One solved question, so you can see how these are marked

A security manager must protect a large database while keeping routine encryption and decryption efficient. Which approach is BEST for the data itself?

Use a symmetric algorithm such as AES with a securely managed secret key.

Symmetric encryption is efficient for bulk data, and AES is a suitable example when its keys are managed securely. RSA is generally used for small values or key establishment, a hash does not provide reversible confidentiality, and a signature provides integrity and authenticity rather than encryption.

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