This package is in no way as secure as a password and will never be. Although it's harder to fool than normal face recognition, a person who looks similar to you, or a well-printed photo of you could be enough to do it. Howdy is a more quick and convenient way of logging in, not a more secure one.
To minimize the chance of this program being compromised, it's recommended to leave Howdy in /lib/security and to keep it read-only.
DO NOT USE HOWDY AS THE SOLE AUTHENTICATION METHOD FOR YOUR SYSTEM."
(Unless you'd argue that the face unlock found on Pixels is not passable either)
Doesn't that mean that any camera can be used to infer phase (and thus depth for face ID, which is a high risk application)?
> variable focus
A light field camera (with "infinite" focus) would also work.
Light field? I remember Lytro! Such cool technology that never found its niche. https://en.wikipedia.org/wiki/Lytro
Is anybody making a successor product?
Is (framerate-1 Hz) a limit, due to the discrete derivative being null for the first n points?
Fortunately this article explained the implications of said breakthrough; "Physicists use a 350-year-old theorem [Huygens-Steiner] to reveal new properties of light waves" https://phys.org/news/2023-08-physicists-year-old-theorem-re... :
> This means that hard-to-measure optical properties such as amplitudes, phases and correlations—perhaps even these of quantum wave systems—can be deduced from something a lot easier to measure: light intensity.
IDK what happened with wave field cameras like the Lytro. They're possibly useful for face ID, too?
"SAR wavefield". There's a thing.
From https://news.ycombinator.com/item?id=32819838 :
> Wave Field recordings are probably [would probably be] the most complete known descriptions of the brain and its nonlinear fields?