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A comment on Show HN: Chrome extension to blur personal data before screen capture. Parent comment

Re:Show HN: Chrome extension to blur personal data before sc... by rhizome on Wednesday April 22, 2020 @08:27PM (#22951621)
How about two blurs? I've thought that a rotational blur followed by a gaussian or similar would be pretty secure.
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Re:Show HN: Chrome extension to blur personal data before sc... by ohazi on Wednesday April 22, 2020 @08:47PM (#22951737)
"pretty secure"

It's either completely secure or it isn't secure at all.

Blurs can be deconvolved if the point spread function is known or can be guessed. Two blurs is just security through obscurity and hoping that numerical precision / stability issues work out in your favor.

Just black out sensitive areas.

https://en.m.wikipedia.org/wiki/Deconvolution

http://refocus-it.sourceforge.net/

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