Consuming device and method for authenticating a consumable component

A consuming device, comprising:

• a power supply for an authentication chip of a consumable component, the power supply having a variable internal resistance;
• a detection device configured:
• to capture information about an operating state of the authentication chip for a plurality of resistance values of the variable internal resistance of the power supply, and
• to determine a dependence of the operating state of the authentication chip on the plurality of resistance values of the power supply;
• and
• an authentication circuit configured to authorize use of the consumable component by the consuming device based on the determined dependence.

A method for authenticating a consumable component at a consuming device, comprising:

• capturing information about an operating state of an authentication chip of the consumable component for a plurality of values of a variable internal resistance of a power supply used by the consuming device to supply the authentication chip;
• determining a dependence of the operating state of the authentication chip on the variable internal resistance of the power supply;
• and
• authorizing use of the consumable component by the consuming device depending on the determined dependence.