The focus of the article is (as the title states) heavily on the surveillance implications, but most of what they discuss also represents additional forms of po

The focus of the article is (as the title states) heavily on the surveillance implications, but most of what they discuss also represents additional forms of potential biometric authentication and are interesting in that respect too (and worth thinking about for people who deride biometrics as a authentication factor, the technology is still in its infancy). Most parts of a person contain significant individual randomness vs the general population when measured at sufficient resolution. The article discusses identifying butts for example, which no doubt provoked some jokes but could be genuinely pretty darn useful in a lot of vehicle anti-theft/security setups. After all, the natural design for these is most commonly for the driver to, well, sit down and then go. So they've got ass-in-seat naturally by definition anyway. Having a butt scanner embedded in the driver seat would be transparent, hard to avoid, and represent a new challenge for an attacker to take.