Gait Recognition Revisited

In New Scientist:   When we explored a number of methods of identity recognition, the one that surprised me then was the ability to recognize people by the pattern of their walking.  We never applied it, but it was added to the list of possible measures.  Not as accurate as a fingerprint, but fairly good.   " .. Gait analysis has attracted attention because of the shortcomings of other biometric security techniques. Iris scans and face recognition require reasonably high-quality images, for example. They also generally require a cooperative subject, as do fingerprints. By contrast, a person's gait can be recognized from low-quality CCTV footage.... ".