| 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 | A Subscriber ID |
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/V1.3/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.
