公开(公告)号：US09444618B1

公开(公告)日：2016-09-13

申请号：US13867429

申请日：2013-04-22

Applicant: Xilinx, Inc.

Inventor： Stephen M. Trimberger ,  Austin H Lesea

IPC: H04L9/00 ,  H04L9/34

CPC classification number: H04L9/002 ,  H04L9/3278 ,  H04L9/34 ,  H04L2209/805

Abstract: Circuits and methods are disclosed for defending against attacks on ring oscillator-based physically unclonable functions (RO PUFs). A control circuit that is coupled to the RO PUF is configured to detect out-of-tolerance operation of the RO PUF. In response to detecting out-of-tolerance operation of the RO PUF, the control circuit disables the RO PUF, and in response to detecting in-tolerance operation, the control circuit enables the RO PUF.

Abstract translation: 公开了电路和方法，以防止对基于环形振荡器的物理不可克隆功能（RO PUF）的攻击。 耦合到RO PUF的控制电路被配置为检测RO PUF的超出公差的操作。 响应于检测到RO PUF的超出公差的操作，控制电路禁用RO PUF，并且响应于检测到公差操作，控制电路使能RO PUF。