Note: Jewish law very carefully defines "public area", and it would take several pages of text to fully explain it, so before objecting be aware you may be lacking background knowledge.
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1. Doubtless someone reading this is thinking, well, they could just get an electronic lock and use that to protect their homes but most Orthodox rabbis would prohibit this as there is the possibility of a spark being created by the electronic system² which would violate the prohibition on making a fire on the Sabbath.
2. This question comes up in Surely You’re Joking Mr Feynman, where Richard Feynman, asked about this by rabbinical students, told them that electricity was not fire and that a condenser across the switch would eliminate any potential spark, but they were unsatisfied with his answer.
> bring their keys¹
Are these keys quantum??
Quantum-key bringing-about² is the main utility (afaik) of these underground quantum networks (pls don’t take this as an endorsement of the tech lol)
These networks have to work during Shabbat..
²https://www.judaica-world.com/index.php/adjustable-shabbos-k...
This gave me pause.