TYAN S3227 Manual page 86

Key source: Default, Custom, Mixed (*) modified from Setup menu
Set New / Append
OsRecovery Signatures
Enroll Factory Defaults or load certificates from a file:
1. Public Key Certificate in:
a) EFI_SIGNATURE_LIST
b) EFI_CERT_X509 (DER encoded)
c) EFI_CERT_RSA2048 (bin)
d) EFI_CERT_SHA256 (bin)
2. Authenticated UEFI Variable
Key source: Default, Custom, Mixed (*) modified from Setup menu
Set New / Append
86
http://www.tyan.com