Battery authentication method and apparatus
AssigneeLenovo (Singapore) Pte. Ltd.
InventorsKenneth Scott Seethaler, Randall Scott Springfield
Life of this patent
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Abstract
Improved handling of battery recognition tasks in an electronic device such as a cell phone, smart phone, computer system, recording device or others is facilitated. Recognition of a battery so as to enable exchange of power between the device and the battery is determined by a match between one of a plurality of number strings stored in the device and the decrypted response to an encrypted challenge derived from the one of stored number string.
Claims16
Method comprising:
- storing a plurality of digitally encoded number strings in an electronic device which has a first cryptographic element and which accommodates line and battery power;
- coupling to the electronic device a battery which has a second cryptographic element;
- exchanging encrypted messages derived from one of the number strings between cooperating first and second cryptographic elements wherein a matched exchange enables the electronic device to recognize the battery and exchange electrical power with the recognized battery;
- and
- supporting a plurality of power states in the electronic device;
- wherein the exchanging of encrypted messages between cooperating first and second cryptographic elements is in response to a transition from one power state of the electronic device to another power state of the electronic device.
Method according to Claim I wherein a failure of a matched exchange enables the electronic device to block exchange of electrical power with an unrecognized battery.
Apparatus comprising:
- an electronic device accommodating line and battery power and incorporating a first cryptographic element and digital memory;
- a plurality of digitally encoded number strings stored in said electronic device digital memory;
- a battery which can be coupled to and exchange power with said electronic device and incorporating a second cryptographic element;
- said first and second cryptographic elements cooperating to exchange encrypted messages derived from one of the number strings so that a matched exchange enables the electronic device to recognize a coupled battery and exchange electrical power with the recognized battery;
- and
- supporting a plurality of power states in the electronic device;
- wherein the exchanging of encrypted messages between cooperating first and second cryptographic elements is in response to a transition from one power state of the electronic device to another power state of the electronic device.
Dependencies are inferred from the claim text.