Authenticating a Replaceable Printer Component
First Claim
1. A replaceable printer component comprising:
- a first memory device configured to store a first secret; and
a communication link configured to communicatively link the first memory device to a printer controller when the replaceable printer component is installed in a printing system;
wherein the printing system comprises a second memory device storing a second secret, the second memory device communicatively linked to the printer controller, andwherein the printer controller is configured to determine an authenticity of the replaceable printer component based on the first secret and the second secret.
1 Assignment
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Accused Products
Abstract
A replaceable printer component includes a first memory device and a communication link. The first memory device is configured to store a first secret. The communication link is configured to communicatively link the first memory device to a printer controller when the replaceable printer component is installed in a printing system. The printing system comprises a second memory device storing a second secret. The second memory device is communicatively linked to the printer controller. The printer controller is configured to determine an authenticity of the replaceable printer component based on the first secret and the second secret.
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Citations
15 Claims
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1. A replaceable printer component comprising:
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a first memory device configured to store a first secret; and a communication link configured to communicatively link the first memory device to a printer controller when the replaceable printer component is installed in a printing system; wherein the printing system comprises a second memory device storing a second secret, the second memory device communicatively linked to the printer controller, and wherein the printer controller is configured to determine an authenticity of the replaceable printer component based on the first secret and the second secret. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A replaceable printer component comprising:
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means for storing a first secret key in the replaceable printer component; means for installing the replaceable printer component into a printing system, the printing system comprising means for storing a second secret key; and means for determining an authenticity of the replaceable printer component based on the first secret key and the second secret key. - View Dependent Claims (11, 12, 13, 14)
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15. A replaceable printer component comprising:
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a first memory device configured to store a first secret; and a communication link configured to communicatively link the first memory device to a printer controller when the replaceable printer component is installed in a printing system, wherein the first memory device is configured to generate a session-key identifier and a first session-key based on the first secret in response to a request received over the communication link and transmit the session-key identifier to the printer controller over the communication link, wherein the first memory device is configured to receive a read request to a data field storing a value indicating the authenticity of the replaceable printer component, the read request including a first message authentication code, and wherein the first memory device is configured to calculate a second message authentication code based on the read request and the first session-key, and perform the read request in response to the second message authentication code matching the first message authentication code.
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Specification