Data medium authentication method

US7636438B1 · kind B1 · utility

Assignee

• GIESECKE & DEVRIENT GMBH · DE

Inventors

• Michael Lamla · Birkenfeld, DE
• Hermann Drexler · Munich, DE
• Wolfgang Rankl · Frauenau, DE
• Franz Weikmann · Plön, DE
• Wolfgang Effing · Forstern, DE

Key dates

• Filing date: Sep 7, 1998
• Grant date: Dec 22, 2009
• Expiry date: Sep 7, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G06Q20/40975
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

The invention relates to a method for testing the authenticity of a data carrier (1) and/or an external device (2) which enters into data exchange with the data carrier (1). According to the invention, the data carrier (1) and the external device (2) are each equipped with a special additional apparatus (4, 6) for generating and/or testing authenticity data. Data transmission between the data carrier (1) and the external device (2) as required for authenticity testing is performed at least partly via a special transmission channel (B). The transmission channel (B) for transmitting authenticity data is separated physically or logically from a transmission channel (A) for transmitting standard data so that there is no mutual interference of data transmission via the two transmission channels (A, B). In authenticity testing, the additional apparatuses for generating and/or testing authenticity data (4, 6) of the data carrier (1) and external device (2) and optionally also the transmission channel (B) for authenticity data must meet special demands which cannot be met by conventional designs. The transmission channel (B) for transmitting authenticity data is activable during the total …