Metering in a data processing system
First Claim
1. A method of metering activity of a data processing system resulting in the generation of respective tamper-resistant metering evidence, the tamper-resistance of the metering evidence being attributable to the difficulty of factorising a large integer which has only two prime factors of roughly equal size.
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Accused Products
Abstract
Λ data processing system is described wherein use of resources in the system is metered. Metering evidence is generated which is difficult to forge and is, thus, relavely resitant to tampering. Such a system finds application, for example, in the field of metering the amount of time a person spends reading advertisement that are published on the World Wide Web. If reliable, such metering evidence may be used by the owner of the web server that contains the adverstisement to bill the originator of the advertissement.
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Citations
20 Claims
- 1. A method of metering activity of a data processing system resulting in the generation of respective tamper-resistant metering evidence, the tamper-resistance of the metering evidence being attributable to the difficulty of factorising a large integer which has only two prime factors of roughly equal size.
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13. A method of metering the amount of time a user spends reading an advertisement comprising the steps:
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displaying the advertisement; and
during display of the advertisement, iteratively evaluating the result of a mathematical function using a large integer which has only two prime factors of roughly equal size as an input to the function, and using a result of one iteration of the function as an input to a next iteration of the function.
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14. A method of metering use of a process executing on a data processing system comprising the steps:
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executing the process; and
during execution of the process, iteratively evaluating the result of a mathematical function using a large integer which has only two prime factors of roughly equal size as an input to the function, and using a result of one iteration of the function as an input to a next iteration of the function.
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Specification