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A comment on There are sensitive internal links in the clear on GEO satellites [pdf]. Parent comment

Re:There are sensitive internal links in the clear on GEO sa... by trenchpilgrim on Tuesday October 14, 2025 @12:30AM (#45576281)
It is almost free on modern CPUs that have hardware acceleration, yea
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Re:There are sensitive internal links in the clear on GEO sa... by 15155 on Tuesday October 14, 2025 @01:19AM (#45576519)
Space-faring electronics aren't exactly cost-sensitive - the cost of a cluster of crypto-accelerated CPUs or rad-hardened FPGAs is peanuts compared to the human and launch costs that go into these satellites.
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Re:There are sensitive internal links in the clear on GEO sa... by blackoil on Tuesday October 14, 2025 @03:35AM (#45577217)
Issue is the satellite was launched 10 years ago with 20-year-old tech. So, calculations of today may not be applicable on them.
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Re:There are sensitive internal links in the clear on GEO sa... by tgsovlerkhgsel on Tuesday October 14, 2025 @12:38AM (#45576316)
Wireguard uses ChaCha20, which to my knowledge neither has nor requires HW acceleration to be fast.
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Re:There are sensitive internal links in the clear on GEO sa... by lxgr on Tuesday October 14, 2025 @08:08AM (#45579069)
It's faster on CPUs without dedicated hardware than AES, but that doesn't mean that it's faster than fixed-function AES hardware.
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Re:There are sensitive internal links in the clear on GEO sa... by fragmede on Tuesday October 14, 2025 @08:11AM (#45579094)
> However, the software performance [of wireguard] is far below the speed of wire.

https://github.com/chili-chips-ba/wireguard-fpga

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