| Patent application number | Description | Published |
|---|
| 20080198468 | Grid Image and Method For the Production Thereof - The present invention relates to a grating image ( | 08-21-2008 |
| 20080258456 | Visually Variable Security Element and Method for Production Thereof - The present invention relates to an optically variable security element ( | 10-23-2008 |
| 20090322071 | Security Element - The present invention relates to a security element for security papers, value documents and the like, having a micro-optical moiré magnification arrangement having
| 12-31-2009 |
| 20100109317 | EMBOSSING LACQUER FOR MICRO-OPTICAL SECURITY ELEMENTS - The present invention relates to a highly refractive embossing lacquer for producing micro-optic arrangements which contains at least one binding agent which has at least one radiation-curing compound system consisting of one or more organic compounds. The highly refractive embossing lacquer is characterized in that at least a portion of the organic compounds of the radiation-curing compound system consists of molecules with at least one polarizable element, so that a polymeric material with a refractive index of greater than 1.5 is formed upon radiation curing. The invention also relates to a security element which is produced with at least one micro-optic authenticity feature. Micro-optic authenticity features according to the present invention permit the production of security elements that are so thin that they can be easily incorporated into value documents. | 05-06-2010 |
| 20100187806 | Endless Material for Security Elements - The present invention relates to a method for manufacturing endless material for security elements having micro-optical moiré magnification arrangements that exhibit a motif grid composed of a plurality of micromotif elements and a focusing element grid composed of a plurality of microfocusing elements for moiré-magnified viewing of the micromotif elements, in which
| 07-29-2010 |
| Patent application number | Description | Published |
|---|
| 20100211624 | DEVICE AND METHOD FOR GENERATING A RANDOM BIT SEQUENCE - A device generates a random bit sequence with a digital ring oscillator circuit comprising logic components. The circuit has an input node and an output node, wherein the digital ring oscillator circuit is designed such that oscillation occurs during a change of state of a logic start signal coupled on the input node, said oscillation having a fixed point, and wherein on the output node a random signal can be tapped having an arbitrary level curve. | 08-19-2010 |
| 20110032041 | DEVICE AND METHOD FOR GENERATING A RANDOM BIT SEQUENCE | 02-10-2011 |
| 20110035588 | Encoding Method and Device for Securing a Counter Meter Reading Against Subsequential Manipulations, an Inspection Method and Device for Verifying the Authenticity a Counter Meter Reading - The invention relates to an encoding method for identifying a subsequential manipulation of a counter meter reading consisting, when the counter reading is increased or decreased, in activating the computation of a new encoded meter reading and in calculating a new encoded meter reading by applying a forward chain one-way function to the encoded meter reading, wherein a complex variable domain of said forward chain one-way function is included into the antecedent domain thereof. The invention also relates to a method for verifying the authenticity of a counter meter reading consisting in subtracting test meter readings based on the meter reading for obtaining the number of tests, in producing an encoded test meter reading by applying the chain one-way function to the encoded meter reading, in applying the chain one-way function with the number of tests and in comparing the test meter reading with the final encoded meter reading and, if the test meter reading defers from the final encoded meter reading, a negative status signal is emitted. An encoding system for carrying out said encoding method and a verification system for carrying out the verification method are also disclosed. | 02-10-2011 |
| 20110163818 | APPARATUS AND METHOD FOR GENERATING A RANDOM BIT SEQUENCE - An apparatus for generating a random bit sequence has a ring oscillator which includes inverting digital devices and on which an oscillator signal can be tapped. An intermediate storage element monitors and stores fluctuating levels of the oscillator signal. At least two controllable switch devices for simultaneously exciting at least two harmonic wave edges of the ring oscillator are provided in a signal path of the ring oscillator. The phasing of the two harmonic wave edges and a potential convergence thereof are subject to statistical fluctuations, which are used as a basis for the random bit generation. A corresponding random number generator can be used in particular as an FPGA for security applications, such as cryptographic methods. The apparatus has substantially digital components, which are easy to produce in a standardized manner. A dedicated regulating circuit is not necessary. The apparatus is also robust toward exterior influences. | 07-07-2011 |
