Analog Guard® — Physical-Layer Encryption from Signal Advance

Effective January 1, 2026, Signal Advance transferred its Analog Guard® encryption technology and related patents into Analog Guard, Inc. (“AGI”), a newly formed Texas corporation and wholly-owned subsidiary of Signal Advance, Inc. Analog Guard is a hardware-rooted, physical-layer encryption platform — a fundamentally different approach from conventional digital encryption, designed to resist the remote-hacking techniques that increasingly defeat software-based security.

How Analog Guard Works

Analog Guard converts digitally represented information into controlled analog signal states, applies key-controlled nonlinear transformation, and returns the protected signal to digital form for storage or transmission. Authorized recovery uses a matched inverse process; a mismatched key is intended to produce output approximating random data rather than a partially readable result — giving the platform a fundamentally different failure mode than conventional digital encryption. See our Analog Guard Technology page for the full engineering detail.

The program has moved beyond concept and simulation into hardware prototyping. Validated models have been translated into circuit designs and schematics, with PCB layouts in progress. Current work focuses on fabricating and testing physical encryption/decryption hardware, confirming matched-key recovery, and correlating bench performance with the simulation record.

Intellectual Property & Markets

The Analog Guard portfolio includes three issued U.S. patents, a fourth application allowed with 30 claims, international filings via the PCT process in China, Germany, and India, and four provisional expansion families spanning nonlinear analog protection, cascaded/multi-key structures, and dynamic transfer-function control. Signal Advance is pursuing IP licensing with semiconductor, cybersecurity, data-storage, and embedded-system partners, as well as potential strategic transactions with defense, semiconductor, and cybersecurity platform companies. See our Analog Guard Markets page for target markets and IP valuation detail.