Carnegie Mellon University’s new Pedo-Biometrics Lab is working on a project to produce biometric shoe insoles that will be able to detect a person by their gait, giving a unique way to restrict access to high-security areas, reports the Associated Press.

The Pedo-Biometrics Lab is a partnership with Canadian company Autonomous ID and has $1.5 million in startup funding. Autonomous ID has been working on the bio-sole project since 2009, hoping to produce a relatively cheap way to identify people.

The prototype bio-soles it’s created so far are about the same thickness as a typical shoe insole sold in a drug store. They’ve been tested on a variety of people in all shapes and sizes and have had an accuracy rate of 99%. They are able to confirm identification within three steps and can adapt to changes in a person’s gait, such as injury or fatigue.

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