Management of the hardware security mechanisms To prevent hardware attacks on the chip, any attempt to operate the chip with a power supply or a clock signal outside the specified range results in a temporary lock of the chip. A reset is then required. Supported cryptographic algorithms DES and triple DES are proposed by default. Specific algorithms can easily be implemented on customer request. Systematically uses session keys.
Separate keys are available for confidentiality and authentication purposes.
Card holder verification Each DF can own its private CHV file or share the CHV file of an upper level. Up to 64 bytes per CHV method can be used to store a PIN, biometrics, etc. Up to 4 CHVs can be stored in a CHV file. The only limitation is the memory size. All ISO 7816-4 types are supported.