| 1 Function | 2 Reference Model | 3 Input/Output Data |
| 4 SubAIMs | 5 JSON Metadata | 6 Profiles |
| 7 Reference Software | 8 Conformance Texting | 9 Performance Assessment |
1 Functions
Service Participant Authentication (PAF-SPA):
| Receives | Participant ID | ID of Service Participant. |
| Uses | Face and Speech Objects | to find the correspondence between the Participant ID of a Participant requesting access to Service and the Subscriber ID of the Service Provider. |
| Produces | Subscriber ID | The Subscriber identified by the PAS-SPA AIM. |
2 Reference Model
Figure 1 specifies the Reference Model of Service Participant Authentication (PAF-SPA).
Figure 1 – The Service Participant Authentication (PAF-SPA) AIM
3 Input/Output Data
Table 1 specifies the Input and Output Data of the Service Participant Authentication (PAF-SPA) AIM.
Table 1 – Service Participant Authentication (PAF-SPA) AIM
| Input | Description |
| Participant ID | ID of a Participant in a session of a Service. From an upstream AIM or another AIW. |
| Speech Object | Speech segment of Participant. |
| Face Visual Object | Face of Participant. |
| Output | Description |
| Subscriber ID | ID of Service Subscriber |
4 SubAIMs
No SubAIMs.
5 JSON Metadata
https://schemas.mpai.community/PAF/V1.4/AIMs/ServiceParticipantAuthentication.json
6 Profiles
No Profiles.
7 Reference Software
8 Conformance Testing
Table 2 provides the Conformance Testing Method for PAF-SPA AIM.
If a schema contains references to other schemas, conformance of data for the primary schema implies that any data referencing a secondary schema shall also validate against the relevant schema, if present and conform with the Qualifier, if present.
Table 2 – Conformance Testing Method for PAF-SPA AIM
| Receives | Participant ID | Shall be string or validate against Instance ID Schema. |
| Speech Object | Shall validate against Speech Object Schema. Speech Data shall conform with Speech Qualifier. |
|
| Face Visual Object | Shall validate against Visual Object Schema. Speech Data shall conform with Visual Qualifier. |
|
| Produces | Subscriber ID | Shall be string. |
9 Performance Assessment
Performance Assessment of a PAF-SPA AIM Implementation shall be performed using the subsets of two datasets of:
- Speech segments all in the same language for each segment of which the Identity of the Speaker is provided with reference to a Taxonomy.
- Faces for each face of which the Identity of the face is provided with reference to a Taxonomy
for which the identity of a speech segment’s speaker is univocally connected to the identity of a face and vice-versa.
The Performance Assessment Report of a PAF-SPA AIM Implementation shall include:
- The Identifier of the PAF-SPA AIM.
- The identifier of the speech segment dataset.
- The identifier of the face dataset.
- The Taxonomy of speaker identifiers.
- The Taxonomy of face identifiers.
- The Accuracy of the Service Participant Authentication AIM defined as the number of correctly recognised pairs of speech segments and faces of the same Speaker and Face to the total number of submitted Speech and Face pairs..
