公开(公告)号：US10289840B2

公开(公告)日：2019-05-14

申请号：US15612841

申请日：2017-06-02

Applicant: Silicon Laboratories Inc.

Inventor： Javier Elenes ,  Sebastian Ahmed ,  Lars Lydersen

IPC: G06F21/55 ,  G06F21/72

Abstract: An integrated circuit includes a tamper sensor that has plurality of state circuits. Each of the plurality of state circuits has a respective output that provides a respective logic state. When operating properly, the respective logic state is toggled in response to a clock signal. The respective logic state fails to toggle in response to a respective fault injection. The tamper sensor has an output that provides a fault signal in response to a difference in the respective logic state of the plurality of state circuits. Additionally, the integrated circuit includes a protected circuit, as well as a tamper response circuit. The tamper response circuit is connected to the tamper sensor and to the protected circuit. The tamper response circuit executes a protection operation to secure the protected circuit in response to the fault signal.

公开(公告)号：US20180349600A1

公开(公告)日：2018-12-06

申请号：US15612841

申请日：2017-06-02

Applicant: Silicon Laboratories Inc.

Inventor： Javier Elenes ,  Sebastian Ahmed ,  Lars Lydersen

IPC: G06F21/55 ,  G06F21/72

CPC classification number: G06F21/554 ,  G06F21/556 ,  G06F21/725

Abstract: An integrated circuit includes a tamper sensor that has plurality of state circuits. Each of the plurality of state circuits has a respective output that provides a respective logic state. When operating properly, the respective logic state is toggled in response to a clock signal. The respective logic state fails to toggle in response to a respective fault injection. The tamper sensor has an output that provides a fault signal in response to a difference in the respective logic state of the plurality of state circuits. Additionally, the integrated circuit includes a protected circuit, as well as a tamper response circuit. The tamper response circuit is connected to the tamper sensor and to the protected circuit. The tamper response circuit executes a protection operation to secure the protected circuit in response to the fault signal.