# 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 EAL6+ 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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.cypherock.com/design-decisions/conflict-between-trusted-parties-should-not-result-in-unauthorized-access.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.