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Method of Enabling or Disabling Verification Process

a verification process and verification technology, applied in the field of secure communication, can solve problems such as exacerbated problems, unacceptable number of keys that may need to be stored in the first entity, and achieve the effect of reducing the number of keys

Inactive Publication Date: 2009-10-29
SILVERBROOK RES PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, common key authentication has some disadvantages.
However, where large numbers of entities are involved, an unacceptable number of keys may need to be stored in the first entity.
The problem is exacerbated when it is desirable to enable a second entity to communicate with a third entity, where the third entity has a key to enable communication, but the second entity does not.

Method used

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  • Method of Enabling or Disabling Verification Process
  • Method of Enabling or Disabling Verification Process
  • Method of Enabling or Disabling Verification Process

Examples

Experimental program
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Embodiment Construction

[0086]Also throughout this description, “printhead module” and “printhead” are used somewhat interchangeably. Technically, a “printhead” comprises one or more “printhead modules”, but occasionally the former is used to refer to the latter. It should be clear from the context which meaning should be allocated to any use of the word “printhead”.

[0087]A SoPEC ASIC (Small office home office Print Engine Controller) suitable for use in price sensitive SoHo printer products is described. The SoPEC ASIC is intended to be a relatively low cost solution for linking printhead control, replacing the multichip solutions in larger more professional systems with a single chip. The increased cost competitiveness is achieved by integrating several systems such as a modified PEC1 printing pipeline, CPU control system, peripherals and memory sub-system onto one SoC ASIC, reducing component count and simplifying board design. SoPEC contains features making it suitable for multifunction or “all-in-one”...

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PUM

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Abstract

A method is provided of enabling or disabling a verification process of a first entity in response to a predetermined event. The first entity has at least one associated bit-pattern and at least one variant key. Each variant key has been generated by applying a one way function to: a base key; and one or more of the at least one bit-patterns, respectively; or one or more alternative bit patterns. Each alternative bit-pattern is based on one of the at least one bit-patterns. In the method, it is determined that the predetermined event has happened, and at least one of the first variant keys is enabled or disabled in response to the predetermined event.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a continuation of U.S. application Ser. No. 12 / 436,133 filed on May 6, 2009, which is a continuation of U.S. application Ser. No. 10 / 854,519 filed May 27, 2004, now issued U.S. Pat. No. 7,557,941, all of which are herein incorporated by reference.FIELD OF THE INVENTION[0002]The present invention relates to the field of secure communication.[0003]The invention has been developed primarily to enable communication between various integrated circuits in a printer, including cartridges for use with the printer, and will be described with reference to this application. However, it will be appreciated that the invention has broad application in the general field, including use in software, hardware and combinations of the two.CO-PENDING APPLICATIONS[0004]Various methods, systems and apparatus relating to the present invention are disclosed in the following co-pending applications filed by the applicant or assignee of the prese...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F15/00
CPCG06F21/606G06F21/445
Inventor WALMSLEY, SIMON ROBERT
Owner SILVERBROOK RES PTY LTD