Secure smart card reader design

A problem with transaction system which requires an open network to carry out operations using a smart card is that the user does not know which information signs with his smart card. In addition, users do not have any proof about the smart card reader authenticity. Architecture of a trustworthy smart card reader to guarantee the correct operations of the smart card is proposed. A secure coprocessor is integrated inside the smart card reader to provide a safe place in order to store sensitive data and support different system level security services. The design includes a barrier substrate, X-ray sensor, temperature sensor and voltage monitors to detect any attempt of modification.