BSNk public scheme keys format description.
Polymorphic pseudonimization uses various keys. Keys or organised in
schemeVersion indicates the version of the cryptographic scheme and this syntax and SHALL start at 1. The
schemeVersion defines the elliptic curve used in the scheme.
schemeKeySetVersion is a version that SHALL start at 1 and represents the effective set of long term scheme master keys (PP-M, PD-M, etc...).
Relying party key format
Keys for relying parties are provided using the notation described in DV-key format.
Public scheme key format
Several of the scheme-wide keys are public, and can be used to use the polymorphism or verify signatures. These keys are defined in Metadata and under the role PPSteutelSet in RoleDescriptors non-Participants. For these public keys the brainpool P320r1 curve is used, which is a named curve defined as