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Why Signal’s post-quantum makeover is an amazing engineering achievement (arstechnica.com)
submitted 1 year ago by to c/technology@lemmy.world
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New design sets a high standard for post-quantum readiness.

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[–] 7 points 1 year ago (7 children)

So that's why Signal didn't send my messages very quickly today then, maybe.

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  • [–] 2 points 1 year ago (6 children)

    It's not completely out yet. That was likely AWS being down.

    Also, the new quantum protected message encryption headers are about 2kb. If that's causing issues with your internet, you may want to consider looking at new internet.

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  • [–] 8 points 1 year ago (1 child)

    2kb? While it may not sound like much, that's at least three packets worth of data (depending on MTU). If you think about it in terms of how TCP sends packets and needs ACKs, there's actually a lot of round trip data processing going on for just that one part.

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  • [–] 8 points 1 year ago

    TCP will generally send up to 10 packets immediately without waiting for the ACKs (depending on the configured window size).

    Generally any messages or websites under 14kb will be transmitted in a single round-trip assuming no packets are dropped.

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  • [–] 4 points 1 year ago* (2 children)

    That was likely AWS being down.

    Sorry, yeah, that's the only thing I was referring to.

    My internet connection is 500/500 Mbps, and I can't change it. 😄👍

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  • [–] 1 point 1 year ago

    The average for a person sending / receiving a message is about 35 / day. That's 70kb / person.

    Signal has aprx. 100 million users.

    Which means this adds about 7 terabytes daily.

    Just doing the math on it, there's no point to this message 😁

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