Abstract: Anti-counterfeiting and counterfeit detection devices and procedures are provided particularly usable in connection with vouchers issued by coin discriminator or coin counting machines. Paper stock may be preprinted with inks which are not readily photocopied without apparent alteration. Preprinting is preferably in two or more orientations such as longitudinal and lateral and preferably some preprinting is positioned closer to the paper stock edge than can typically be achieved using ordinarily available laser printers or inkjet printers. A pattern of perforations, preferably micro perforations, are provided in a curved, preferably tightly radiused shape or configuration. Serial numbers or other identifiers may be preprinted on portions of the paper stock and matching or correlatable numbers printed on such preprinted paper stock substantially at the time of printing the voucher value.
Type:
Grant
Filed:
September 21, 2001
Date of Patent:
March 18, 2008
Assignee:
Coinstar, Inc.
Inventors:
Steven M. Geiger, David J. Brown, Timothy J. Manion, Scott J. Scherer
Abstract: An image decoder system includes a series of optically or digitally encoded images mounted on a series of flat surfaces. A decoding lens is positioned over the encoded images. The decoding produces simulated three-dimensional image, simulated motion images or other visible effects. The system includes a backing plate to which the images and one or more decoding lenses are hingedly attached, resulting in a variety of decoding methods. To improve image clarity, locking devices such as Velcro fasteners, snaps, locking tabs, etc. are used to hold the lens to the image surface. Special inks for the encoded images and selected material for lens manufacture are used to improve contact between the image and the lens. Alignment marks are encoded with the image and used to match to alignment marks on the lens to clarify the decoded image. Wide, narrow and special combination lenticular lenses are used for special decoding effects.
Abstract: A film material utilizing a regular two-dimensional array of non-cylindrical lenses to enlarge micro-images, called icons, to form a synthetically magnified image through the united performance of a multiplicity of individual lens/icon image systems. The synthetic magnification micro-optic system includes one or more optical spacers (5), a micro-image formed of a periodic planar array of a plurality of image icons (4) having an axis of symmetry about at least one of its planar axes and positioned on or next to the optical spacer (5), and a periodic planar array of image icon focusing elements (1) having an axis of symmetry about at least one of its planar axes, the axis of symmetry being the same planar axis as that of the micro-image planar array (4). A number of distinctive visual effects, such as three-dimensional and motion effects, can be provided by the present system.
Type:
Grant
Filed:
November 22, 2004
Date of Patent:
February 19, 2008
Assignee:
Nanoventions Holdings, LLC
Inventors:
Richard A. Steenblik, Mark J. Hurt, Gregory R. Jordan
Abstract: This invention relates to an object of value with a security element having a thermochromic layer and disposed completely on the surface of the object of value. The thermochromic layer is combined with an effect layer having visually and/or machine testable properties.
Abstract: The invention relates to a data carrier with a security printed image produced by intaglio printing. The security printed image consists of a plurality of contrasting structural elements disposed in exact register. A first part of the structural elements is designed to be relieflike and tactile and a second part of the structural elements flat and nontactile.
Type:
Grant
Filed:
December 28, 2000
Date of Patent:
December 25, 2007
Assignee:
Giesecke & Devrient GmbH
Inventors:
Karlheinz Mayer, Roger Adamczyk, Peter Franz, Eckhard Braun
Abstract: The type of printing medium on which an image will be formed is discriminated based upon the image of the medium surface read by an image reading unit for reading the surface as an image. If the discriminated medium type is other than a prescribed printing medium, the image is formed without changing an image formation parameter. When the type of printing medium and the state of the surface are discriminated, image formation can be performed in the most stable image forming mode if an abnormality occurs.
Abstract: A product provided with a coding pattern which comprises a plurality of marks, each of which represents one of at least two different values, and which further comprises a plurality of nominal positions, each of the plurality of marks being associated with a nominal position and the value of each mark being determined by its location relative to its nominal position. A method and device of using the product are also disclosed.
Abstract: The invention disclosed herein represents a means for increasing the gripability of a credit-card-sized card. Specifically, dimples raised from, indented in, or embossed in a credit-card-sized card are arranged to from a tread on the front or back of a card. This tread allows fingers to more easily grip a credit-card-sized card for ease of handling or removal from a wallet or carrying case. Moreover, the means disclosed does not interfere with various means such as magnetic stripes commonly used to store encoded information on credit-card-sized cards.
Type:
Grant
Filed:
July 6, 2000
Date of Patent:
September 25, 2007
Assignee:
Bank of America Corporation
Inventors:
Richard J. Collins, R. Bruce Montgomery, Jr., Allen Kendle
Abstract: Methods and systems for measuring and gathering data relating to publication usage by participants in publication readership studies. Some methods and systems employ portable monitors carried by participants of the studies along with publications fitted with various devices, such as piezoelectric transducers, RFID tags and others devices and circuits.
Type:
Grant
Filed:
March 18, 2005
Date of Patent:
September 25, 2007
Assignee:
Arbitron Inc.
Inventors:
Alan R. Neuhauser, James M. Jensen, Jack C. Crystal, Jack K. Zhang, Daniel W. Pugh, Douglas J. Visnius, Eugene L. Flanagan, III
Abstract: In one aspect, the invention provides a security laminate comprising a retroreflective layer comprising a plurality of retroreflective microbeads partially embedded in and protruding from a beadbond layer and having image receptive material disposed around the protruding microspheres. In another embodiment, the security laminate further comprises indicia patterns viewable in retroreflective light. In another embodiment, the security laminate is imaged on the image receptive material.
Type:
Grant
Filed:
February 6, 2003
Date of Patent:
August 14, 2007
Assignee:
3M Innovative Properties Company
Inventors:
Graeme R. Mann, Brian W. Dunne, Paul D. Graham, Thomas Junck, Mark F. Schulz
Abstract: A secure document comprises a pliable fabric comprising human-readable information. The secure document further comprises a memory attached to the pliable fabric in which machine-readable information about the secure document is stored. The secure document further comprises an interface attached to the pliable fabric and coupled to the memory that, when a reader device reads the secure document, transmits at least a portion of the machine-readable information stored in the memory to the reader device.
Type:
Grant
Filed:
February 18, 2004
Date of Patent:
July 24, 2007
Assignee:
Hewlett-Packard Development Company, L.P.
Inventors:
Ray Siuta, Martin Marx, Dan Rengert, Corbin Champion, Cyrille DeBrebisson
Abstract: The invention provides for a label such as a temper evident holographic or diffractive security label that consists of at least two separate microstructures (30, 31), one exhibiting a holographic or diffractive security image, the other a non visible non-diffractive structure which controls differential release of a reflector or semi reflector layer (27) to display a separate visual message upon removal of the label by tamper. The advantage over previous prior art devices is that both the diffractive message and the tamper evident message are encoded within the microstructure without any need for additional coating or print layers in the device.
Abstract: Durable security devices that are resistant to chemical attack and mechanical degradation and security articles employing such devices, are provided. By way of the durable security device of the present invention, opposing longitudinal borders adjacent an information-bearing layer are sealed, thereby preventing corrosive and/or degrading materials from reaching this layer through these sealed borders. In a preferred embodiment, at least a portion of the information-bearing layer is fully encapsulated, thereby rendering this portion or layer and the information conveyed thereby, impervious to chemical attack.
Type:
Grant
Filed:
August 19, 2003
Date of Patent:
July 17, 2007
Assignee:
Technical Graphics, Inc.
Inventors:
Paul F. Cote, Stephen B. Curdo, Gerald J. Gartner, Daniel G. Leeds, Brian C. Page, Gary R. Wolpert, Timothy T. Crane
Abstract: Transaction form systems and methods that include secure customer slips for use with traditional manual credit card imprinting techniques are provided. A transaction form system can include a cardholder slip, an accepter slip, and a duplication arrangement. The duplication arrangement can be configured to produce a complete image of a presentation instrument identifier onto the accepter slip and to produce a partial image of the presentation instrument identifier onto the cardholder slip.
Abstract: A method of applying an authentication image to an article is presented. The method comprises obtaining a digitized version of the authentication image, encoding the digitized version of the authentication image to produce an encoded latent image, and printing the encoded latent image on a printable surface of the article containing a primary image using a transmittent printing medium.
Type:
Grant
Filed:
August 25, 2004
Date of Patent:
June 5, 2007
Assignee:
Graphic Security Systems Corporation
Inventors:
Alfred V. Alasia, Thomas C. Alasia, Alfred J. Alasia
Abstract: Disclosed herein are methods and apparatus for providing markings upon objects, including the read side of an optical information media, where the markings do not substantially interfere with object, including the use of the optical information media. This invention discloses use of a coating, marking schemes, printing of markings with UV light, as well as methods and apparatus for reading and deciphering said marking. Included is an authentication scheme, where the marking may be used as a lock to limit access to information contained in an optical information media.
Type:
Grant
Filed:
June 6, 2002
Date of Patent:
May 22, 2007
Assignee:
Spectra Systems Corporation
Inventors:
Nabil M. Lawandy, Jeffrey L. Conroy, Robert S. Afzal, Allison Berube, Charles M. Zepp, Andrei Smuk
Abstract: The present invention provides a discrimination medium A for discriminating the authenticity of an article by providing an optically discriminating mark on the article. A film 20 having a light reflecting layer of a polymer cholesteric liquid crystal having a circular polarization light selectivity for reflecting a specific circular polarization light is fixed to a part of the surface of a support 10. A printed portion is made by printing on the portions other than the film 20 of the support 10 in substantially the same color as that shown when the film 20 is viewed from the front. The discrimination medium A appears to be red at the support 10 and the film 20 when viewed from the front (although the film has a metallic luster), but at a larger viewing angle, the film 20 changes to blue by the blue-shift of the polymer cholesteric liquid crystal so as to exhibit a color different from that of the support 10.
Abstract: The invention relates to a self-adhesive or heat-sealable security information medium designed to be applied to a page of a security document and to receive printing and/or writing, comprising an adhesive layer and at least one covering layer that covers the adhesive layer, characterized in that the cohesive strength of the covering layer is less than the adhesive strength of the adhesive layer. The invention also relates to a method for the security protection of a page of a security document and to a security protection feature used in the security protection method. The invention also relates to a page of a security document possessing said security protection feature and to a passport possessing said page.
Abstract: Conventionally, when counterfeit judgment processing by using electronic watermark is performed in a printer driver, a printing speed is lowered due to heavy load. To solve the problem, in the printer driver, first, it is judged whether or not image data indicated by input print information is in high quality. If the image data is in high quality, it is judged whether or not the image data represents a particular image. If the image data represents the particular image, predetermined processing is performed on the image data. This minimizes the execution of counterfeit judgment processing and reduces the load.
Abstract: A combined printing and binding device which is designed to print and bind a multi-page interactive publication. The device includes a communicator which is designed to receive a set of page descriptions from a computer system. The page descriptions correspond to the pages of the interactive publication and each page description includes content information and coded data. The device also includes a printer which is designed to print, onto media sheets, each of the page descriptions received by the communicator. The printer does this by simultaneosly printing the content information in visible ink and the coded data in substantially invisible ink. The device also includes a binder that is designed to bind the printed media sheets together to form the printed, bound, interactive publication.
Abstract: A secure document value includes a sheet-like substrate and a thin film, optically variable security device on the substrate. The security device includes a carrier and a multilayer coating on the carrier. The multilayer coating includes a dielectric-metal stack having an exposed reflective layer that is tailored after manufacture to include security data proprietary to the issuer of the document of value thereby to deter forgery. Since the security device is tailored after manufacture, the end supplier of the document of value does not need to provide the proprietary information to the manufacturer of the security device for incorporation therein. This also enables the manufacturer of the security device to stockpile material until such time the material must be customized to include proprietary data. This results in shorter lead times and better response to market demands.
Abstract: The present invention relates to a self-adhesive or thermally bondable security document that can be affixed to an article, characterized in that it comprises at least one medium capable of receiving print on the front side, said medium having, on its reverse side, at least one self-adhesive or thermally adhesive layer and at least one marker that emits a characteristic signal by itself, such that, after the document has been bonded by means of said adhesive layer to the article, in the event of disbandment of the document at least part of said marker detaches from the medium. The invention also relates to a method of authenticating the article.
Abstract: A security element (2) comprising a reflective, optically variable surface pattern (3) which is embedded in a layer composite of plastic material and which can be visually recognized from predetermined observation directions is formed from a mosaic of optically active surface elements (13). In the mosaic of the surface pattern (3) at least two of the mosaic surfaces (11; 12) of the surface pattern (3) are arranged substantially adjacent and have microscopically fine light-diffractive relief structures (4). The spatial frequencies of the relief structures in the mosaic surfaces (11; 12) are of values from predetermined spatial frequency ranges in such a way that, in the case of illumination beams which are incident obliquely relative to a normal onto the plane of the layer composite, the relief structures of the mosaic surfaces (11; 12) deflect visible monochromatic light parallel to the normal (32).
Type:
Grant
Filed:
May 31, 2002
Date of Patent:
December 5, 2006
Assignee:
OVD Kinegram AG
Inventors:
Andreas Schilling, Wayne Robert Tompkin
Abstract: Stationery, or other printable media, is encoded with a digital watermark. The watermark is not conspicuous to a human observer of the media, yet conveys plural bits of auxiliary information when optically scanned and digitally processed. The watermark can be formed by ink-jet printing, or otherwise. The encoded information can be used for various purposes, including authenticating the document as an original, linking to associated on-line resources, and distinguishing seemingly-identical versions of the same document (document serialization).
Type:
Grant
Filed:
February 3, 2005
Date of Patent:
November 14, 2006
Assignee:
Digimarc Corporation
Inventors:
Geoffrey B. Rhoads, Aruna B. Kumar, Trent J. Brundage, Brett T. Hannigan, Tony F. Rodriguez, J. Scott Carr
Abstract: The present invention provides a durable and self-verifying secure document system and a method for its production, wherein counterfeiting is prevented. The secure document system is potentially useful for a wide variety of documents including, but not limited to, lottery tickets, currency, traveler's checks, passports, stock and bond certificates, bank notes, driver's licenses, wills, coupons, rebates, contracts, food stamps, magnetic stripes, test answer forms, invoices, tickets, inventory forms, tags, labels and original artwork. The instant invention provides a plastic paper substitute having various indicia associated therewith including visible and hidden indicia. Application of the hidden indicia to the plastic paper substitute is implemented in accordance with a computer software program, and the document includes an integral lens area which is particularly designed to verify the document's authenticity by rendering the hidden indicia visible to the viewer.
Abstract: The present invention allows verification of a voucher or token prior to redemption. The voucher or token has a code associated therewith so that a value of the voucher or token may be stored in a database. Later when the voucher or token is presented to a cashier for redemption, the code is submitted to the database in order to retrieve the value associated with that voucher or token. In this way, the voucher or token is verified before redemption. In one embodiment, a verification system includes a voucher or token database, a recognition subsystem and two transceivers. The database knows the code and value associated with the voucher or token. A recognition subsystem reads the code from the voucher or token. The transceivers couple together the database and the recognition subsystem in such a way that the a query can be made by the recognition system to determine the value associated with the code or otherwise verify the validity of the voucher or token.
Abstract: The present invention describes security paper and security items in general containing at least one security element having at least one photoluminescent segment characterized by a linearly polarized photoluminescence and/or a linearly polarized absorption. The present invention also describes a method of producing such security items as well as the use thereof.
Abstract: A method and system that registers data carried by a watermark with a server, reads watermark data from a document and generates an action string if a watermark read from a document matches registered data. In one embodiment the system includes two servers. Registration is done on one server via the internet the registration data is sent to a second server. The second server is interrogated via a local area network (LAN) to determine if particular watermark data is registered. The LAN allows data carried on documents such as tickets to be authenticated very quickly. In a second embodiment, there are multiple registration servers, each of which registers a different sets of watermark data. The compartmentalization of data increases security and privacy of data.
Abstract: Security strips for identifying the genuineness of sheet material such as documents, securities and banknotes. The security strips are constructed of several different components, encoding means and electrically conductive layers connected in different arrangements on a support substrate. Layers of known per se electrically conductive polymers are being used. The security strips are applied on the sheet material or they are integrated in the sheet material. These security strips constitute insurmountable technological obstacles for a forger.
Abstract: A method and apparatus are disclosed for determining the authenticity of secured documents which include an authentication element of the type which, when excited with radiation of a specific excitation wavelength, emits radiation which can be detected by a detection unit and evaluated by an evaluating unit. The intensity profile of the emitted radiation is determined in a specified wavelength range over a predetermined measuring period after excitation and analyzed to determine authenticity of the secured document.
Type:
Grant
Filed:
March 15, 2002
Date of Patent:
August 15, 2006
Assignee:
Bundesdruckerei GmbH
Inventors:
Benedikt Ahlers, Anett Bailleu, Arnim Franz-Burgholz, Oliver Muth, Manfred Paeschke, Hans Zerbel
Abstract: The present invention provides a method and apparatus for the production and labeling of objects in a manner suitable for the prevention and detection of counterfeiting. Thus, the system incorporates a variety of features that make unauthorized reproduction difficult. In addition, the present invention provides an efficient means for the production of labels and verification of authenticity, whereby a recording apparatus which includes a recording medium, having anisotrophic optical domains, along with a means for transferring a portion of the recording medium to a carrier, wherein a bulk portion of the recording medium has macroscopically detectable anisotrophic optical properties and the detecting apparatus thereon.
Type:
Grant
Filed:
May 24, 2000
Date of Patent:
August 8, 2006
Assignee:
Tracer Detection Technology Corp.
Inventors:
David I. Durst, Norman Kaish, Jay Fraser
Abstract: A discrete micro particle having a micro image, a method of making discrete micro particles and use in authentication of products. The micro images are printed on a photo sensitive layer on a media and the media is ground into small discrete particles on which the micro images can be viewed for verification of the authenticity of a product on which the micro particles have been placed.
Abstract: A decorative foil is in the form of a layer composite structure (1) and comprises at least a transparent base foil (2), a transparent cover layer (4) and a transparent dielectric layer (3) arranged between the base foil (2) and the cover layer (4). When the decorative foil serves as a lamination foil for a substrate (5) the material of the cover layer (4) is an adhesive. A reflective metallic layer (6) is arranged at least in surface portions between the dielectric layer (3) and the cover layer (4) and optionally a metal film (11) is also arranged on the side of the dielectric layer (3) facing the base foil (2). General items of information shown by the decorative foil are produced by means of modulation of the thickness (s) of the dielectric layer (3). Transparent locations (7) form individual items of information, wherein the transparent locations (7) are produced with a laser beam (19) by perforating the metal layer (6; 11).
Abstract: A carrier sheet comprising a printed paper sheet having an integrated detachable card with a magnetic backing and method of manufacturing same is described. The carrier sheet is comprised of a printed paper sheet having printed matter on at least a front face thereof. The printed matter contains card information printed in a card area. A polyfilm patch is adhered over the card area and over the card information printed thereon. A thin flexible patch of magnet material is adhesively secured on a rear face of the paper sheet and extends over the card area. A die-cut is made in the sheet and delineates the contour of the card area and extends through the polyfilm patch, the paper sheet and partly into the patch of magnet material to form a burstable region along said die-cut to hold the card in the carrier sheet. The die-cut can have any ornamental shape.
Type:
Grant
Filed:
October 10, 2001
Date of Patent:
May 9, 2006
Assignee:
Relizon Canada Inc.
Inventors:
William Dale Ritchie, Christopher Robert Cox, Bill Garland
Abstract: A self-verifying security document, such as a banknote, comprises a flexible sheet formed from a plastics substrate bearing indicia. The sheet has a window of transparent plastics material that includes self-verification means for verifying a security device provided at a laterally spaced second portion of the sheet when the sheet is bent or folded to bring the window into register with the security device. The self-verification means may be an optical lens for reading an area of microprinting. In another embodiment, the self-verification means may be an optical filter for viewing an area printed with metameric inks. In other embodiments, the self-verification means and the security device may be polarizing windows or Moire inducing patterns.
Type:
Grant
Filed:
July 1, 2004
Date of Patent:
May 9, 2006
Assignee:
Securency PTY LTD
Inventors:
John Charles Taylor, Bruce Alfred Hardwick, Wayne Kevin Jackson, Paul Zientek, Cameron Rex Hibbert
Abstract: The invention relates to a document of value such as a paper of value or ID card with a security element having an optically variable material. Said optically variable material conveys different color effects at different viewing angles. Additionally, the security element has at least one machine-readable feature substance that does not impair the visually visible optically variable effect of the optically variable material.
Abstract: The invention relates to security paper (1) including at least one zone (2; 3) that reacts with nonpolar solvents. The paper also includes a barrier (4) that is impermeable to nonpolar solvents between a first outside face (10) of the security paper and the zone (2; 3) that reacts with the solvents.
Abstract: A security element is equipped with first code of magnetic material and/or second code of electroconductive material and has in addition third, optically read-able code, for example as negative writing and/or as a bar code, which is present in the magnetic and/or electroconductive code or is produced preferably together with third, neutral material, the neutral material not being either electroconductive or magnetic. According to the invention it is provided that all three aforementioned materials are indistinguishable to the viewer optically, that is, with the naked eye, and therefore appear as a uniform coating made of a single material.
Abstract: Method of making airline luggage inspection secure while accommodating the needs of the traveler comprises making a special lock available to airline travelers, the special lock having a combination lock portion and a master key lock, the master key lock portion receiving a master key that can open the master key lock portion of any special lock of this type. The special lock is designed to be applied to an individual piece of airline luggage and has indicia conveying to luggage purchasers that the special lock is “approved” by a luggage screening authority and conveying to the luggage screening authority that the special lock can be opened using the master key. The method includes providing the luggage screening authority directly or indirectly with exclusive access to the master key. The manufacturers and/or providers of the master key and special lock retain copies of the master key.
Abstract: A card label having a system for discouraging its non-authorized removal and reuse, which initiate an incontrollable combustion process that completely damage the card label and its information and included circuitry when it is attempted to remove the card label from a surface.
Type:
Grant
Filed:
September 16, 2003
Date of Patent:
April 18, 2006
Assignees:
Dinformatica del Noroeste S.A. de C.V., Centro de Investigacion en Materiales Avanzados S.C.
Inventors:
Alfredo Aguilar Elguezabal, Luis de la Torre Sáenz, Alejandro López Ortiz, Manuel Román Aguirre, Oscar Ayala Valenzuela
Abstract: The invention concerns a method for producing security marks on a support having a first face and a second face opposite said first face which consists in the following steps: high resolution printing with a varnish on the support first face; treating the support by electrolysis; washing and drying the support.
Abstract: The invention relates to a digital security image, to be arranged on or in carrier, particularly a document, such as bonds or other documents the authenticity or origin of which is of importance, and having at least a first and second security characteristic visually almost imperceptibly incorporated in the digital security image, wherein the first security characteristic is detectably copied on a copy when copying the document and the second security characteristic is not copied onto said copy when copying the document, as well as a method for arranging and for detecting such a security element, as well as equipment for it. Additionally the invention relates to an image and an image in electronic form, provided with the security element according to the invention.
Abstract: Method of making airline luggage inspection secure while accommodating the needs of the traveler comprises making a special lock available to airline travelers, the special lock having a combination lock portion and a master key lock, the master key lock portion receiving a master key that can open the master key lock portion of any special lock of this type. The special lock is designed to be applied to an individual piece of airline luggage and has an indicia thereon conveying to luggage purchasers that the special lock is “approved” by a luggage screening authority and conveying to the luggage screening authority that the special lock can be opened using the master key. The method includes providing the luggage screening authority directly or indirectly with exclusive access to the master key. The manufacturers and/or providers of the master key and special lock retain copies of the master key.
Abstract: A lottery ticket having a first game area having at least one row with each row containing a plurality of play indicia and a second game area adjacent each row of the first game area and containing a target indicia which if present may result in a prize being won.
Type:
Grant
Filed:
June 29, 2001
Date of Patent:
February 28, 2006
Assignee:
Oberthor Gaming Technologies, Inc.
Inventors:
Kevin Paul Downes, Geneva McCaffrey, Carla Schaefer
Abstract: A continuous lenticular label construction including a lenticular assemblies joined with a continuous web so that the lenticules of the assemblies are transverse to the longitudinal axis of the web. A method of manufacture includes: advancing a continuous web of label stock and securing the lenticular assemblies to the continuous web with that lenticules of the lenticular assemblies oriented perpendicular to the length of the continuous web. Optionally, the continuous web defines or includes a window through which the lenticular assemblies are viewed.
Type:
Grant
Filed:
November 25, 2003
Date of Patent:
February 21, 2006
Assignee:
CCL Label, Inc.
Inventors:
Guy S. Kiraly, Donald P. Klein, Brian J. Baumgart
Abstract: The control element has a first drawing printed on a first side of the article, comprising at least a first set of geometrical shapes. It includes a second drawing printed on a second side of said article, the second drawing being printed so as to face the first drawing and be in register with the latter, said second drawing comprising at least a second set of geometrical shapes corresponding to the first screen. At least one of said geometrical sets includes sectors which are offset so that, when the front side/reverse side register is correct, the control element has regions of variable density which are visible in transmitted light and are created by said offset sectors.
Abstract: In order to verify the authenticity of manufactured goods, a smart tag is attached to the goods containing encrypted authentication information, such as a serial number, a description of the good's physical appearance or chemical decomposition, its color, or digital images of the good etc. The encryption procedure comprises public/private key encryption with zero-knowledge protocols. Zero knowledge protocols allow a smart tag to be authenticatable and yet be duplication resistant by allowing the verifying agent to convince him/herself that the smart tag is authentic without revealing its authentication information. The verification procedure can be done using a reader at a point of sale (POS) machine equipped with the appropriate public key and zero-knowledge protocols to decrypt the authentication information. A printed version of the serial number or other authentication information may be placed on the goods in human readable form to quickly verify the information electronically read from the smart tag.
Type:
Grant
Filed:
October 29, 1998
Date of Patent:
February 7, 2006
Assignee:
International Business Machines Corporation
Inventors:
Don Coppersmith, Claude A. Greengard, Charles P. Tresser, Chai Wah Wu
Abstract: Patterns are aligned on the front and back surfaces of a document to provide an anti-counterfeiting security device. The document is sufficiently transparent to allow see-through of the partial image on the back of the document to be superimposed on the partial image on the front of the document to form a complete image if the patterns are properly aligned. The complete image will disappear if misaligned.
Abstract: Stationery, or other printable media, is encoded with a digital watermark. The watermark is not conspicuous to a human observer of the media, yet conveys plural bits of auxiliary information when optically scanned and digitally processed. The watermark can be formed by ink-jet printing, or otherwise. The encoded information can be used for various purposes, including authenticating the document as an original, linking to associated on-line resources, and distinguishing seemingly-identical versions of the same document (document serialization).
Type:
Grant
Filed:
March 15, 2001
Date of Patent:
January 10, 2006
Assignee:
Digimarc Corporation
Inventors:
Geoffrey B. Rhoads, Aruna B. Kumar, Trent J. Brundage, Brett T. Hannigan, Tony F. Rodriguez, J. Scott Carr
Abstract: The invention relates to a security paper with at least two types of mottled fibers, which differ in terms of their luminescent characteristics and form a code. In each case one type of mottled fibers is present in a defined subarea of the security paper, and the code is represented by the defined geometric arrangement of the subareas on the security paper and/or by the presence or absence of mottled fibers of a specific type.