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Difficulty: EasyCryptographic Concepts and Algorithms

A systems analyst is selecting an encryption method to protect large volumes of static data archived on enterprise storage arrays. The primary requirement is high-speed performance and minimal processing overhead during bulk encryption and decryption operations. Which of the following cryptographic approaches should the analyst implement?

  1. Symmetric encryption using the Advanced Encryption Standard (AES)Answer
  2. B
    Asymmetric encryption using the Rivest-Shamir-Adleman (RSA) algorithm
  3. C
    Cryptographic hashing using the Secure Hash Algorithm (SHA-256)
  4. D
    Digital signatures based on Elliptic Curve Cryptography (ECC)

Answer

The analyst should implement symmetric encryption using the Advanced Encryption Standard (AES).
Symmetric key encryption algorithms, such as AES, use the same secret key for both encryption and decryption operations. Due to their mathematical efficiency, symmetric ciphers process large blocks of data rapidly with low CPU usage, making them the standard choice for bulk data-at-rest encryption.

Step-by-Step Solution

1
Identify the operational requirement from the scenario.
The requirement calls for encrypting large volumes of archived storage with high performance and low computational overhead.
Bulk storage encryption requires an algorithm capable of processing large streams of data without creating processing bottlenecks.
2
Compare algorithm categories for bulk data processing.
Symmetric ciphers use a single key and optimized substitution-permutation operations, making them significantly faster and less resource-intensive than asymmetric ciphers.
Asymmetric algorithms are designed primarily for key exchange, digital signatures, and small payloads due to their high computational cost.

Key Concept

Symmetric vs. Asymmetric Encryption Performance for Bulk Data
Estimated Time:45s
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Topics

Cryptographic Concepts and Algorithms

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