Giesecke & Devrient Gmbh

Walter Straub

Gerhard Stenzel

Thomas Giering

Dieter Stein

Wolfgang Deckenbach

Klaus Thierauf

Thomas Grassl

Franz Müller

Wolfgang Rapf

Hermann Weilacher

Arvid Wiren

Christoph Thiel

An apparatus for checking the authenticity of bank notes in unprotected areas, has a sensor assembly containing a light source which produces light of a first wavelength with which the bank notes to be checked are illuminated; whereupon one or more feature substances present in and/or on the bank notes produces light of a second wavelength which is detected by the sensor assembly. A control device evaluates data from the sensor assembly about the light of the second wavelength and compares them with reference data to determine the authenticity of the bank notes. The structure and operation of the sensor assembly and/or the control device permit conclusions to be drawn only with difficulty on the feature substance or substances contained in the bank notes.

Apparatus for checking the authenticity of banknotes

A method for protecting a security data memory is described wherein external action on a component containing the security data memory is detected by sensors. Overshooting of a threshold on one of the sensors causes an attack to be signaled by reason of which the content of the security data memory is at least partly erased. The status of the sensors is permanently monitored and the status data of the sensors recorded.

Method for protecting a data memory

A document of value, such as a check or ID card or the like, having information specific to the document, in particular user-related data. The document having at least one luminescent area which is partially masked so as to yield a coding which is machine-readable and correlated at least with parts of the specific information in order to permit authenticity testing.

Document of value having two seperate corresponding data

Growing community of inventors

Oberhaching, Germany

Walter Straub