ChaoLogix had spent more than a decade developing logic gates that harness the chaos that stems from non-linear physical behaviour. Back in 2010 the company was using non-linear physics to create a single circuit that could generate all possible fundamental logic gate outputs, the so-called "chaogate." At the time the company said the development would have particular significance for data security applications.
The acquisition of ChaoLogix happened in October 2017. The company’s LinkedIn entry reads "ChaoLogix Inc. (now part of Arm)." The www.chaologix.com website leads to ARM's security pages. ChaoLogix was thought to be small company with few employees.
The company, a US-Indian startup with operations in Florida and Hyderabad, developed a two-input, one-output device that could be function as a NOR, NAND and XOR with the functionality controlled by voltages applied through analog multiplexing circuitry. Such chaotic logic cells need to be calibrated to map inputs and initial conditions to the desired outputs. But the chaotic nature of the mapping clearly has a potential benefit in obfuscating structure and operation.
One benefit is that chaogates are said to have a power signature that is independent of the inputs which makes it valuable in thwarting differential power analysis (DPA) side channel attacks.
A spokesperson for ARM said: "ChaoLogix has created technology that reduces the effectiveness of DPA- and DEMA-based [differential electromagnetic analysis] security attacks, and as security is key in many markets, ARM will be integrating this technology into future products. This will enable ARM's customers to bring more secure products to market at a very competitive cost."
More information on the technology can be found in this blog .
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The article, Chaogates: morphing logic gates designed to exploit dynamical patterns appeared in the journal Chaos. See: https://aip.scitation.org/doi/full/10.1063/1.3489889