• 0 Posts
  • 141 Comments
Joined 1 year ago
cake
Cake day: June 22nd, 2023

help-circle












  • If they control the domain, they can see all incoming mail delivery attempts to sniff for addresses that were used. They’d still have to know the domain of the email address for the login they were attacking, which might not be super useful if they’re going after a certain login. But, going the other direction would be more fruitful: buy a domain, dump all incoming mail into a catch-all box, and start looking for bank alert emails or other periodic/promo emails. You might find services that just use email addresses for a login name, or ones that have a “forgot username” feature that only uses email for recovery. Multi-factor auth spread across multiple services (email, SMS, authenticator codes…) would help mitigate significantly by making them also have to take over a phone number or get an old device. Not impossible, but then you’re making them work harder for it, and when good account recovery services heavily mask the available targets, it makes it harder to know what else to acquire (e.g., a specific phone number) even if they get as far as full email domain control.



  • Based on one of your comments clarifying what you’re wondering, I don’t know that this helps you in what you’re looking for, but the “OMG particle” came to my mind. It was traveling at such high energy when it hit our atmosphere that…

    If the proton originated from a distance of 1.5 billion light years, it would take approximately 1.71 days in the reference frame of the proton to travel that distance.

    The energy of the particle was some 40 million times that of the highest-energy protons that have been produced in any terrestrial particle accelerator.

    In the center-of-mass frame of reference (which moved at almost the speed of light in our frame of reference), the products of the collision [with a particle in our atmosphere ] would therefore have had around 2900 TeV of energy, enough to transform the nucleus into many particles, moving apart at almost the speed of light even in this center-of-mass frame of reference. As with other cosmic rays, this generated a cascade of relativistic particles as the particles interacted with other nuclei.

    I don’t know if that cascade is the same as the Cherenkov radiation it produced, but that radiation is how they detected this particle, and it’s interesting a.f.

    [It is] emitted when a charged particle (such as an electron) passes through a dielectric medium (such as distilled water) at a speed greater than the phase velocity (speed of propagation of a wavefront in a medium) of light in that medium. … Its cause is similar to the cause of a sonic boom…

    I.e., (layman’s understanding here) the particle, having a dual particle- and wave-like nature, is propagating through the vacuum of space “close” to the max speed of propagation of causality itself. As it encounters a medium, our atmosphere, it is going faster than causality itself can possibly propagate through that medium. But the energy is still there and isn’t going to just vanish, so it has to split out into multiple particles that would, with their fraction of the original energy, then be able to propagate through the medium. Or something amazing like that?

    Edit: My layman’s understanding of Cherenkov radiation requires a bigger disclaimer, like a strike-through. :)



  • I hitched my horse to just what I consider the basics–zip and unzip–and that has made it easy for me. But I’ve been stuck on those.

    Extract anything:

    tar xf <archive_file>
    

    Create a tbz2 archive:

    tar cjf <archive_file.tbz2> <stuff to put in it>
    

    (And tossing in a -v is pretty universal, if that’s your thing.)

    Some day, instead of commenting on a reddit Lemmy post, I think I’ll Google how to tell it to use .xz.

    Ok, you know what? Today is finally that day. It’s just capital -J instead of lower-case -j! That’s easy enough to remember, I guess.