Chip cards providing trusted time references

The present invention relates to a chip card (1) providing a trusted absolute time reference independently from its position, to a terminal (2) with such a chip card (1) and to a method to operate such a chip card (1). The chip card (1) is suitable to be inserted in terminals (2) and comprises a clock unit (11) to provide a time reference, an internal power source (12) to at least run the clock unit (11) in case of absence of an external power source (22), and a signal receiver (13) to receive a satellite navigation signal comprising a satellite time signal, wherein the signal receiver (13) is connected to the clock unit (11) in order to synchronize the clock unit (11) with the satellite time signal to enable the clock unit (11) to provide the time reference as a trusted absolute time reference independently from the position of the chip card (1).