公开(公告)号：US11822036B2

公开(公告)日：2023-11-21

申请号：US17495880

申请日：2021-10-07

Applicant: ORACLE INTERNATIONAL CORPORATION

Inventor： James Rohrkemper ,  Yifan Wu ,  Guang C. Wang ,  Kenny C. Gross

IPC: G01V3/10

CPC classification number: G01V3/10

Abstract: Embodiments for passive spychip detection through polarizability and advanced pattern recognition are described. For example a method includes inducing a magnetic field in a passive component of a target system while the target system is emitting EMI with changes in amplitude repeating at a time interval; generating a time series of measurements of a combined magnetic field strength of the induced magnetic field and the EMI; executing a frequency-domain to time-domain transformation on the time series of measurements to create time series signals of combined magnetic field strength over time at a specific frequency range; monitoring the time series signals with an ML model trained to predict correct signal values to determine whether predicted and measured values of the time series agree; and indicating that the target device may contain a passive spychip where anomalies are detected, and is free of passive spychips where no anomalies are detected.