Pilot, programmer and aviation lover. L-1011 forever 🛫

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Joined 1 年前
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Cake day: 2023年6月30日

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  • The radar you’re talking about is a pulse-doppler radar. It doesn’t see things the same way your eyes (or a synthetic-aperture radar for example) do and it’s not down to filters. A P-D radar observes and measures the Doppler effect which only occurs when the object is moving and determines the contact’s velocity, heading and altitude based on that. A jet flying vertically at 0 GS would probably be detectable, although this would be difficult since, as you said, it’s not moving directly towards or away from the radar.





  • I don’t think it’s paranoid to not want any intermediary to know what you’re talking about, even if all you’re talking about is innocuous things like groceries.

    Besides, they don’t have to “waste time” on anything. They’ve got computers to collect it all.

    Of course, like you said, Signal or Matrix are potential solutions for that, but you still need to get both sides to agree on using them. SMS have the advantage that everyone has a phone number and can thus use them. Upgrading to RCS will secure this insecure-yet-very-popular medium.
















  • “Private” and “email” should really not appear in the same sentence. The email protocol was not designed with privacy in mind, so any company offering you a “private” email service is simply pandering to the privacy-conscious crowd. Yes, some may promise to store your messages with “zero access encryption” and end-to-end encrypt messages between users of the same service but unless you’re only messaging those users (not gonna happen) copies of all your messages will be hanging around on much less secure/private servers.

    Tutanota, Protonmail and Lavabit are currently the most known services promising private email (I have personally opted for Protonmail because it’s free and does not require invites) but you’re making a mistake if you want to use email for any sort of private or confidential communication. Use mail to create an account on with a service designed with privacy in mind, sure, but don’t try and twist email into something that it isn’t - you will regret it.

    My general philosophy with email is to use a service which would go out of business if it was found out that they’ve been giving 3rd parties access to your messages and even then don’t store anything sensitive on mail. The ones mentioned above will do fine for that.