Systems and methods for authentication of printer supply items
AssigneeLexmark International, Inc.
InventorsChristopher Alan Adkins, James Ronald Booth, Matthew David Clarke, Graydon Randall Dodson, Joshua Scott Potter
Life of this patent
Estimating the term…
Abstract
Methods for authenticating printer supply items using revocation lists are disclosed. Revocation lists are updated using DNSSEC to communicate between a printer and a DNS name server. A first domain name is created containing a request for a challenge to an authentication module and sent to the DNS name server. A second domain name is created containing a response to the challenge and sent to the DNS name server. The DNS name server indicates success or failure, which is used to authenticate the printer supply item. Other systems and methods are disclosed.
Claims12
A method of verifying the authenticity of a toner cartridge of an imaging device having a cartridge serial number, the method comprising:
- establishing a chain of trust from an Internet root name server to a rights management name server (RM name server) using Domain Name System Security Extensions (DNSSEC);
- sending from the imaging device a first domain name to the RM name server that includes a request for a challenge associated with the cartridge serial number;
- receiving a first response From the RM name server that contains a token with a format of a first IP address;
- determining by the imaging device whether the received first IP address is within a first set of IP addresses;
- and
- upon a positive determination adding the cartridge serial number to a revocation list and displaying a first error on a display of the imaging device.
A method of operating an imaging device to verify the authenticity of a toner cartridge containing an authentication ASIC (application-specific integrated circuit) having an identification string, the method comprising:
- sending from the imaging device a first domain name to a rights management name server (RM name server) that includes a request for a challenge and the identification string included in the authentication ASIC;
- receiving a first response from the RM name server that contains a token with a format of a first IP address;
- determining by the imaging device whether the received first IP address is an odd address;
- and
- upon a positive determination displaying a first error on a display located on the imaging device of the imaging device.
A method of operating an imaging device to verify the authenticity of a toner cartridge containing an authentication ASIC (application-specific integrated circuit) having a serial number comprising:
- sending from the imaging device a first domain name containing the cartridge serial number to a rights management name server (RM name server) and in response receiving a token with a format of a first IP address from the RM name server;
- sending a second domain name to the RM name server and in response receiving a token with the format of a second IP address from the RM name server, wherein the second domain name contains a response generated by the authentication ASIC based on the received first IP address;
- determining by the imaging device whether the received first IP address is even and the received second IP address is 0.0.0.0;
- upon a positive determination, printing using toner from the toner cartridge;
- and
- upon a negative determination displaying an error on a display located on the imaging device.
Dependencies are inferred from the claim text.