Describes the digital signature algorithms allowed by the C2PA spec
Per https://c2pa.org/specifications/specifications/1.0/specs/C2PA_Specification.html#_digital_signatures:
All digital signatures that are stored in a C2PA Manifest shall > be generated using one of the digital signature algorithms and > key types listed as described in this section
Describes the digital signature algorithms allowed by the C2PA spec
Per https://c2pa.org/specifications/specifications/1.0/specs/C2PA_Specification.html#_digital_signatures: