Hello,

writing a certificates with opensc-explorer to a TCOS card works,
but an additional hex FF is added at the end of  the certificate.
So you have to create the certificate file on the card being one bit
longer than the certificate. Is the additional FF necessary for
any application? Wouldn't it be better to leave the certificate as it is?

After writing the certificate with opensc-explorer, you can write
the next time without entering the PIN. I suppose, the changed
ACL is responsible for this. If I write the certificate with the tool
from FlexSecure, you have to enter the PIN before you can change
the certificate. Can you set the ACL to the original value
using opensc-explorer ?

Regards,
 Johannes

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