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Contact-less tag with signature, and applications thereofContact-less tag with signature, and applications thereof description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20090160615, Contact-less tag with signature, and applications thereof. Brief Patent Description - Full Patent Description - Patent Application Claims
This application is a continuation, and claims the benefit under 35 USC 120, of International Application No. PCT/CA2007/002343 filed on Dec. 20, 2007 and hereby incorporated by reference herein. The present invention relates generally to contact-less tags and, more specifically, to a contact-less tag having a signature as well as to applications using the properties of such a tag. Contact-less tags, such as radio frequency identification (RFID) tags, are becoming increasingly commonplace in various commercial applications, two non-limiting examples of which include access control and inventory management. An RFID tag affixed to an item stores a code (e.g., a bit pattern) that is output in contact-less fashion to a reader, either in response to a request from the reader or autonomously by the tag. The reader captures the bit pattern and then an action may be taken, depending on the commercial application at hand. For example, in an access control scenario, the captured bit pattern may reveal that the person presumed to be carrying the tag (by virtue of an association with the bit pattern) is—or is not—authorized to enter a building or operate a vehicle. In an inventory management scenario, the bit pattern may give an indication of items contained on a pallet, for example, which may result in certain decisions being taken regarding shipping or storage of these items. In both cases, the ease with which an RFID tag may be read by a reader enables rapid processing but also may lead to problems. In the access control scenario, for example, an RFID tag of an individual authorized to access certain property may be interrogated and then the bit pattern cloned for use by an impostor to gain what is in fact unauthorized access to such property. Similarly, in the inventory management scenario, an acquired knowledge of the bit pattern associated with a certain item may allow a malicious party to gain intelligence about inventory locations that the item\'s rightful owner (which may include the manufacturer all the way down to the retail customer) may wish to keep secret. In both of the above scenarios, it is apparent that what is relevant to a malicious party is the knowledge that a certain bit pattern output by a certain RFID tag will either give access to property or indicate the presence of a specific inventory item. Whether the bit pattern is itself an encrypted version of some original data is actually of no relevance to the malicious party. Thus, schemes based on straightforward encryption of the bit pattern do not mitigate the problems mentioned above. Against this background, there is clearly a need in the industry for a contact-less tag having improved properties. A first broad aspect of the present invention seeks to provide a method, which comprises generating a first signature by encoding an identifier with a first additional data set at a first time instant; responding to a first read request from a tag reader by releasing the first signature; generating a second signature by encoding the identifier with a second additional data set at a second time instant, the second additional data set being different from the first additional data set; and responding to a second read request by releasing the second signature. A second broad aspect of the present invention seeks to provide an apparatus, which comprises means for generating a first signature by encoding an identifier with an additional data set at a first time instant; means for responding to a first read request from a tag reader by releasing the first signature; means for generating a second signature by encoding the identifier with a second additional data set at a second time instant, the second additional data set being different from the first additional data set; and means for responding to a second read request from a tag reader by releasing the second signature. A third broad aspect of the present invention seeks to provide a computer-readable medium, which comprises computer-readable program code which, when interpreted by a computing apparatus, causes the computing apparatus to execute a method. The computer-readable program code comprises first computer-readable program code for causing the computing apparatus to generate a first signature by encoding an identifier with an additional data set at a first time instant; second computer-readable program code for causing the computing apparatus to respond to a first read request from a tag reader by releasing the first signature; third computer-readable program code for causing the computing apparatus to generate a second signature by encoding the identifier with a second additional data set at a second time instant, the second additional data set being different from the first additional data set; and fourth computer-readable program code for causing the computing apparatus to respond to a second read request from a tag reader by releasing the second signature. A fourth broad aspect of the present invention seeks to provide a device for use in contact-less communication with a reader, which comprises a memory configured to store a first signature generated by encoding an identifier with a first additional data set at a first time instant; and a controller configured to generate a new signature by encoding the identifier with a second additional data set at a second time instant, the second additional data set being different from the first additional data set. The controller is further configured to cause the new signature to be stored in the memory after the second time instant. A fifth broad aspect of the present invention seeks to provide a device for use in contact-less communication with a reader, which comprises a memory configured to store a signature that encodes a pre-determined identifier; a transceiver configured to contactlessly receive read requests from the reader and to contactlessly transmit responses thereto; a controller configured to respond to read requests received via the transceiver by releasing via the transceiver a current version of the signature stored in the memory, wherein the version of the signature stored in the memory varies over at least two time instants while continuing to encode the pre-determined identifier; and a power source for powering at least the controller. These and other aspects and features of the present invention will now become apparent to those of ordinary skill in the art upon review of the following description of specific embodiments of the invention in conjunction with the accompanying drawings. Continue reading about Contact-less tag with signature, and applications thereof... Full patent description for Contact-less tag with signature, and applications thereof Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Contact-less tag with signature, and applications thereof patent application. Patent Applications in related categories: 20090267739 - Chipless microwave identification tag - A chipless microwave identification tag (200) comprising: a dielectric substrate (210); and a plurality of antenna elements (220) made from a conductive material and disposed on at least one surface (205, 255) of the dielectric substrate (210); wherein when the tag (200) is excited by an incident microwave signal (131), ... 20090267743 - Method and apparatus for a deployable radio-frequency identification portal system - In one embodiment, an apparatus includes a first assembly, a second assembly, and a coupling element coupled to the first assembly and the second assembly. The first assembly includes a processor, a memory, and a radiator module, the processor operatively coupled to the memory and the radiator module. The second ... 20090267736 - Non-contact electronic device - A contactless electronic device comprises a semiconductor integrated circuit device, a plurality of antennas (or antenna coils) for receiving high-frequency signals supplied by radio waves or electromagnetic waves having different frequencies. An interface judgment circuit judges which antenna the high-frequency signals are inputted through, and according to a result of ... 20090267741 - Rfid floor tags for machine localization and delivery of visual information - An RFID system for a portable cleaning machine having RFID reader. Location of the machine within a floor field is achieved by detecting one or more of a plurality of floor-applied RFID tags as the cleaning machine traverses the floor field. 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Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Contact-less tag with signature, and applications thereof or other areas of interest. ### Previous Patent Application: Cartridge for including at least rfid tag and appratus for communicating with rfid tag Next Patent Application: Credit, security, debit cards and the like with buttons Industry Class: Communications: electrical ### FreshPatents.com Support Thank you for viewing the Contact-less tag with signature, and applications thereof patent info. IP-related news and info Results in 2.36407 seconds Other interesting Feshpatents.com categories: Accenture , Agouron Pharmaceuticals , Amgen , AT&T , Bausch & Lomb , Callaway Golf paws |
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