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Example Workflow of SIM-Based Authentication with Passpoint
- User Device with SIM detects a Passpoint-enabled Wi-Fi network.
- The device checks its Passpoint profile and determines that EAP-SIM is supported by the network.
- The device sends an authentication request using EAP-SIM, including the IMSI (International Mobile Subscriber Identity) from the SIM card.
- The Wi-Fi network’s AP forwards the request to the RADIUS server, which queries the user’s mobile network for authentication.
- The mobile network verifies the SIM credentials using the HLR/HSS and sends back an authentication challenge.
- The device responds to the challenge using the SIM card.
- Upon successful verification, the RADIUS server grants access to the Wi-Fi network, and the user is automatically connected.
Certificate-based authentication