Authentication using magnetic field based on current drawn by security device
AssigneeLexmark International, Inc.
InventorsJAMES HOWARD ELLIS, JR., TIMOTHY JOHN RADEMACHER
Life of this patent
Estimating the term…
Abstract
Systems and methods for determining authenticity of a security device of a component in an imaging device includes receiving, by the security device, an authentication challenge including one or more commands and executing, by the security device, the one or more commands in response to receiving the authentication challenge. A magnetic field profile is generated based on current drawn by the security device from a power source while the security device is executing the one or more commands, the generated magnetic field profile indicating an authentication response of the security device to the authentication challenge for use in determining authenticity of the security device.
Claims20
A supply item for installation in an imaging device, comprising:
- a housing;
- and
- a security device chip connected to the housing, the security device chip being configured to draw current through a conductor from a power source during execution of an authentication challenge thereby generating a magnetic field about the conductor and sending to itself the generated magnetic field.
A toner cartridge for installation in an imaging device, comprising:
- a housing having toner for imaging media in the imaging device;
- and
- a security device chip connected to the housing, the security device chip being configured for self-authentication when the housing is installed in the imaging device including being configured to generate an authentication challenge and an authentication response thereto whereby during execution of the authentication challenge the security device chip is configured to draw current through a conductor from a power source thereby generating a magnetic field about the conductor and the security device chip determines authenticity of the supply item by comparing the generated magnetic field with an expected magnetic field.
Dependencies are inferred from the claim text.