Which element ensures that PKI is used to establish the identity of IoT devices?

Question

Options

• Aunique device identifier
• Bencryption key
• Cair gap
• Dhashed routes

• A
  72% (36)
• B
  14% (7)
• C
  4% (2)
• D
  10% (5)

Explanation

A unique device identifier is the PKI element that establishes IoT device identity because PKI relies on binding a cryptographic certificate to a specific, verifiable identity - the unique ID serves as that anchor, allowing a certificate authority to issue and validate credentials tied to a specific device. Encryption keys (B) are used to protect data in transit or at rest but don't themselves establish who a device is - identity must come first. Air gaps (C) are a physical network isolation technique unrelated to PKI's identity model. Hashed routes (D) is not a standard PKI or IoT security concept and serves as a red herring.

Memory tip: Think of PKI like a passport system - the passport (certificate) is only meaningful because it's linked to a unique person (unique device identifier). No unique ID, no verifiable identity.

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