PAD Mechanism Identifiers
| Organization Name | Organization Identifier Hex | Organization Identifier Decimal | PAD Mechanism Identifier Hex | PAD Mechanism Identifier Decimal | Description |
|---|---|---|---|---|---|
| ISO/IEC JTC 1 SC 37 Biometrics | 101 | 257 | 1 | 1 | PAD identifier 1: Challenge/involuntary response |
| ISO/IEC JTC 1 SC 37 Biometrics | 101 | 257 | 2 | 2 | PAD identifier 2: Challenge/voluntary response |
| ISO/IEC JTC 1 SC 37 Biometrics | 101 | 257 | 3 | 3 | Challenge/response as a combination of what you are and what you know |
| ISO/IEC JTC 1 SC 37 Biometrics | 101 | 257 | 4 | 4 | PAD Identifier 4: Non-stimulated observation of liveness |