2.2.20.5.2 KEY_USAGE_FIDO

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The key material is a UTF-8 encoding of a JSON serialized object [RFC8259] of the following structure:

 {
     "version": {"type": "integer"},
     "authData": {"type": "string"},
     "x5c":
     {
         "type": "array",
         "items": {"type": "string"}
     },
     "displayName": {"type": "string"}
 }

version: An integer that specifies the version of the structure.

authData: A base64-encoded Authenticator Data structure, as specified in section 6.1 of [W3C-WebAuthPKC1].

x5c: An array of base64-encoded certificates.

displayName: A string representing the display name that is associated with the credential.