Conflict between trusted parties should not result in unauthorized access
To prevent losses due to the conflict of trusted parties (guardians) that might be having access to the threshold number of X1 Cards (2 or more), Cypherock uses PIN protection on top of X1 Cards to securely store the cryptographic parts. The X1 cards uses the same secure hardware that is used to develop debit cards and credit cards for the banking industry.
Brute forcing an X1 Card is prevented using a time exponential algorithm which limits the subsequent access of the cryptographic part. The X1 Cards have an EAL5+ security rating. The Evaluation Assurance Level (EAL1 through EAL7) of an IT product or system is a numerical grade assigned following the completion of a Common Criteria security evaluation, an international standard in effect since 1999.