US 12,452,280 B2
Method and system of detecting computer network data leaks over optical channels
Don Edward Barber, Pacific Grove, CA (US); Vikram Krishna Kanth, Odenton, MD (US); Zachary White, Alexandria, VA (US); and John Colin McEachen, Carmel-by-the-Sea, CA (US)
Assigned to The Government of the United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed by THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE NAVY, Arlington, VA (US)
Filed on Jun. 12, 2024, as Appl. No. 18/740,884.
Claims priority of provisional application 63/472,459, filed on Jun. 12, 2023.
Prior Publication US 2024/0414181 A1, Dec. 12, 2024
Int. Cl. G06V 10/30 (2022.01); G06V 10/60 (2022.01); G06V 20/40 (2022.01); H04L 9/40 (2022.01)
CPC H04L 63/1425 (2013.01) [G06V 10/30 (2022.01); G06V 10/60 (2022.01); G06V 20/46 (2022.01); G06V 20/49 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A method of detecting computer network data leaks over optical channels comprising:
capturing a video of a target area;
subdividing frames of the video into smaller blocks to generate a plurality of video clips;
applying a Fast Fourier transform (FFT) to the plurality of video clips, wherein an average luminance of the plurality of video clips is represented in the frequency domain;
applying a bandpass filter to the frequency domain representations, wherein the bandpass filter eliminates one or more strong tones in the plurality of video clips;
analyzing the spectral divergence of the bandpass filtered frequency domain representation; and
identifying suspect transmissions, wherein suspect transmissions are areas having higher spectral entropy in the plurality of video clips.