ETSI MSS Mobile PKI - SSO
- Tomi Pelttari
This document describes the overall architecture related to ETSI MSS.
ETSI MSS comprises the architectural components and dependency systems listed in the following table:
Component | DESCRIPTION |
|---|---|
SSO Server | The SSO server product against which the User authenticates |
Authentication Server (UAS) | A component of SSO server. Some configuration changes are applied specifically to this component or its files. |
Mobile PKI method (MPKI) | An SSO Server method that handles sending and receiving of ETSI MSS requests to MSSP. Conforms to ETSI TS 102 204 standard |
Security Assertion Markup Language Service Provider (SAML SP) | A SAML-based service provider configured to intercept authentication requests on behalf of a web application server |
Mobile Signature Service Provider (MSSP) | Mobile Phone Operator's service that supports sending SMS authentication requests and returning responses to SSO for verification. Conforms to ETSI TS 102 204 standard |
Web application | A web application integrated to SSO by using SAML SP. |
Mobile phone | User's mobile phone. |
Browser | User's compatible web browser. |
Basic Login Sequence
This section describes ETSI MSS login sequence in simple terms.
Figure 1 Presents a simplified ETSI MSS login sequence:
| Figure 1 Simplified ETSI MSS login sequence |
The following steps describe the sequence presented in Figure 1.
- User initiates authentication process using a web browser
- SSO Server prompts for user's mobile phone number and an optional misuse prevention code, and sends the authentication request to a MSSP (mobile operator).
- MSSP sends the request to User's mobile phone.
- User signs the request and sends the signature back to the MSSP.
- MSSP sends the signature with user's certificate back to SSO Server where the signature is verified.
Detailed Login Sequence Diagram
Figure 2 presents the login sequence in more detail:
| Figure 2 Detailed login sequence |
Limitations
Here are listed the known limitations related to ETSI MSS.
- Only asynchronous messaging mode is supported
- The only supported signature profile is authentication
- Refer to MSS FiCom Implementation guideline 2.2 for an explanation of the terms.