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A comment on Who Would Kidnap a Space Telescope?. Parent comment

Re:Who Would Kidnap a Space Telescope? by spydum on Friday August 27, 2021 @09:15AM (#28327422)
Same, but I'm curious why you think it's encrypted at all? Also makes me curious how resistant to crypto attacks satellites would be, given all the various failings and gotchas with terrestrial tech and tls and others.
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Re:Who Would Kidnap a Space Telescope? by jaywalk on Friday August 27, 2021 @09:37AM (#28327634)
I'm curious why you think they'd just leave open the ability to destroy a satellite to anyone with a powerful enough transmitter. The telemetry, tracking and control (TT&C) data is absolutely encrypted for any serious satellite operating today.
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Re:Who Would Kidnap a Space Telescope? by okl on Friday August 27, 2021 @09:58AM (#28327868)
You need authentication, not encryption for that. And yes, every satellite's TTM has an AU (authentication unit) nowadays.
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