IC card and IC chip module
AssigneeRohm Co., Ltd.
InventorsYoshihiro Ikefuji, Hiroharu Okada
Life of this patent
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Abstract
In an IC card 30 is sealed an IC chip 70 provided with an exposure sensor 84. When exposure sensor 84 detects that IC card 30 has been opened, exposure sensor 84 outputs an exposure detection signal to a CPU 76. In response to the exposure detection signal, CPU 76 provides a predetermined operation, such as erasure of data in a non-volatile memory 78. As such, the data in non-volatile memory 78 cannot be obtained if IC card 30 is improperly opened to check the data in non-volatile memory 78. Thus the IC card can obtain an enhanced data security.
Claims14
An IC card comprising:
- an IC chip having a CPU;
- a housing body housing said IC chip;
- and
- exposure detection means formed at said IC chip, detecting opened condition of said housing body;
- characterized in that
- said CPU controls said IC chip to at least have a portion of a function thereof failing to normally function in response to a signal indicative of the opened condition having been output from said exposure detection means when the CPU receives a power supply voltage to start to operate, and when a specific signal is received said CPU allows said portion to normally function.
An IC chip module with at least two members integrally formed, at least one of said members being provided with an IC chip having a CPU, comprising exposure detection means formed at said IC chip, detecting opened condition of said IC chip module, characterized in that said CPU controls said IC chip to at least have a portion of a function thereof failing to normally function in response to a signal indicative of the opened condition having been output from said exposure detection means when the CPU receives a power supply voltage to start to operate, and when a specific signal is received said CPU allows said portion to normally function.
Dependencies are inferred from the claim text.