Which encryption algorithm provides the strongest security for sensitive government communications and is approved by the NSA for TOP SECRET information?

  1. AES-256 ✓
  2. RC4
  3. RSA-2048
  4. DES

Correct answer: AES-256

Option A is correct because AES-256 is a symmetric encryption algorithm approved by the NSA for protecting TOP SECRET information and is part of the Commercial National Security Algorithm Suite. Option B is incorrect because RC4 is a deprecated stream cipher with known vulnerabilities and is no longer considered secure for any sensitive communications. Option C is incorrect because RSA-2048 is an asymmetric algorithm used primarily for key exchange and digital signatures, not for bulk data encryption, and while it provides strong security it is not the NSA-approved choice for TOP SECRET bulk data. Option D is incorrect because DES uses a 56-bit key that is completely broken and has been deprecated since the late 1990s.

Topic: General Security Concepts · encryption, aes, nsa, cryptography

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