In which phase of Internet Key Exchange (IKE) protocol is peer authentication performed?

The correct answer is B. Phase 1. IKE operates in two phases. Phase 1 establishes a secure, authenticated channel between the two peers - its primary goal is mutual peer authentication and the negotiation of the IKE SA (Security Association). Authentication can be done via pre-shared keys, digital certificates…

Submitted by marco_it· Apr 18, 2026Network and Communications Security

Question

In which phase of Internet Key Exchange (IKE) protocol is peer authentication performed?

Options

APre Initialization Phase
BPhase 1
CPhase 2
DNo peer authentication is performed

How the community answered

(33 responses)

A
6% (2)
B
88% (29)
C
3% (1)
D
3% (1)

Explanation

IKE operates in two phases. Phase 1 establishes a secure, authenticated channel between the two peers - its primary goal is mutual peer authentication and the negotiation of the IKE SA (Security Association). Authentication can be done via pre-shared keys, digital certificates, or public key encryption. Phase 2 uses the secure channel established in Phase 1 to negotiate the IPsec SAs that protect the actual data traffic (defining encryption/integrity algorithms for the tunnel). There is no 'Pre Initialization Phase' in the IKE standard.

Topics

#IKE#IPsec#Authentication#VPN Protocols

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