Token device for conducting cryptography key backup or restoration operation

A token device (110) of a cryptography key backup device (100), comprising:

• a transmission interface (113) arranged to operably receive power required for operations of the token device (110) from an external device;
• a physiological characteristic detecting circuit (115) arranged to operably detect user's touch actions and the user's physiological characteristics;
• a smart card accessing circuit (211) arranged to operably detect user's card-placing actions, and arranged to operably access an on-card secure chip (121) positioned on a smart card (120), wherein the on-card secure chip (121) comprises a built-in on-card secure memory (223);
• an on-token secure chip (213) comprising a built-in on-token secure memory (215);
• and
• a control circuit (217) coupled with the transmission interface (113), the physiological characteristic detecting circuit (115), the smart card accessing circuit (211), and the on-token secure chip (213), and arranged to operably generate one or more user identification data corresponding to a detecting result of the physiological characteristic detecting circuit (115), to operably transmit a first user identification data to the on-token secure chip (213) for verifying a user's identity, and to operably transmit a second user identification data to the on-card secure chip (121) for verifying the user's identity;
• wherein if the user's identity is successfully confirmed by both the on-token secure chip (213) and the on-card secure chip (121), the control circuit (217) conducts a corresponding key backup operation or key restoration operation between the on-token secure chip (213) and the on-card secure chip (121).