Sara, a security engineer, is testing encryption ciphers for performance. Which of the following ciphers offers strong encryption with the FASTEST speed?

Question

Options

• A3DES
• BBlowfish
• CSerpent
• DAES256

• A
  2% (1)
• B
  73% (30)
• C
  15% (6)
• D
  10% (4)

Explanation

Blowfish is specifically designed for speed and is well-known for its high throughput in software implementations, making it one of the fastest strong symmetric encryption ciphers available. It supports key sizes up to 448 bits, providing strong security. 3DES (Option A) applies the DES algorithm three times sequentially, making it significantly slower than modern alternatives. Serpent (Option C) is one of the most secure block ciphers but is intentionally designed with a conservative, slower design - it was a finalist in the AES competition but lost to Rijndael partly due to speed. AES256 (Option D) is fast, especially with hardware acceleration (AES-NI), but in pure software benchmarks Blowfish often outperforms it. For CompTIA Security+ purposes, Blowfish is the established answer for fastest strong cipher.

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