Title:
【発明の名称】集積回路
Document Type and Number:
Japanese Patent JP2002536727
Kind Code:
A
Abstract:
An integrated circuit with at least one antenna for the contactless transmission of data or energy. The antenna is configured above and/or below circuit sections to be protected and, as part of a protective circuit, enables the integrated circuit to be monitored with regard to an undesirable external attack. Such an attack can be identified by the attempt to effect observation or manipulation from the outside, which are typically associated with an alteration of the physical properties of the antenna. These physical alterations lead to significant changes in the protective circuit signals that are transmitted via the antenna. These changes are identified by signal detectors and initiate a transfer of the integrated circuit into a security mode. In this case, in addition to the function as means for transmitting data and/or energy, the antenna also serves the function of being a protective shield of a protective circuit for the integrated circuit. This integrated function of the antenna makes it possible to provide a cost-effective, protected integrated circuit with an antenna for contactless transmission in particular for use in smart cards.
Inventors:
Michael smora
Dominique vegert zweder
Dominique vegert zweder
Application Number:
JP2000596520A
Publication Date:
October 29, 2002
Filing Date:
January 03, 2000
Export Citation:
Assignee:
Infineon Technologies Actien Gezel Shaft
International Classes:
G06K19/07; G06K19/073; H01Q1/24; H01Q1/38; H01Q1/40; H01Q7/00; (IPC1-7): G06K19/07; G06K19/073; H01Q1/24; H01Q1/38; H01Q1/40; H01Q7/00
Attorney, Agent or Firm:
Toshio Yano (4 outside)