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(ISC)2

SSCP · Question #1157

If you the text listed below at the beginning or end of an email message, what would it be anindication of? mQGiBDfJY1ERBADd1lBX8WlbSHj2uDt6YbMVl4Da3O1yG0exQnEwU3sKQARzspNB…

The correct answer is C. A PGP Signed message. The provided text snippet is characteristic of a PGP (Pretty Good Privacy) digital signature, indicating message integrity and sender authenticity.

Submitted by manish99· Apr 18, 2026Cryptography

Question

If you the text listed below at the beginning or end of an email message, what would it be anindication of? mQGiBDfJY1ERBADd1lBX8WlbSHj2uDt6YbMVl4Da3O1yG0exQnEwU3sKQARzspNB zB2BF+ngFiy1+RSfDjfbpwz6vLHo6zQZkT2vKOfDu1e4/LqiuOLpd/6rOrmH/Mvk

Options

  • AA virus
  • BA worm
  • CA PGP Signed message
  • DA software error

How the community answered

(53 responses)
  • A
    2% (1)
  • B
    4% (2)
  • C
    89% (47)
  • D
    6% (3)

Why each option

The provided text snippet is characteristic of a PGP (Pretty Good Privacy) digital signature, indicating message integrity and sender authenticity.

AA virus

A virus is malicious software, not a specific text pattern at the beginning or end of an email.

BA worm

A worm is a self-replicating malware, not a signature block within an email.

CA PGP Signed messageCorrect

The specific format of the text, starting with 'mQGiBDfJY1ERBAD...' and containing a long string of alphanumeric characters, is a recognizable pattern for a PGP (Pretty Good Privacy) digital signature block, which is used to cryptographically sign messages.

DA software error

While software errors can occur, this specific well-structured block is indicative of a cryptographic signature, not a random error.

Concept tested: PGP digital signatures identification

Source: https://www.gnupg.org/gph/en/manual/x135.html

Topics

#PGP#Digital Signatures#Email Security#Cryptography Basics

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