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Battery authentication method and apparatus

  • US 9,755,441 B2
  • Filed: 11/24/2014
  • Issued: 09/05/2017
  • Est. Priority Date: 03/03/2011
  • Status: Active Grant
First Claim
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1. A device accommodating line and battery power, comprising:

  • a main processor;

    a power management interface;

    a memory storing a plurality of digitally encoded number strings operatively coupled to the main processor;

    a cryptographic element operatively coupled to the memory; and

    a memory device that stores instructions executable by the main processor to;

    detect coupling of a battery;

    send, using the cryptographic element, an encrypted message derived from one of the plurality of digitally encoded number strings to the battery;

    receive, from the battery, an indication of recognition; and

    manipulate an exchange of power with the battery based upon the indication of recognition received;

    wherein the main processor of the device supports a plurality of states of system power management through the power management interface; and

    wherein an encrypted message is sent responsive to each transition from one power state to another power state of the device.

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