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May 2025

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  • Oct. 20th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 10:16 pm

    Geometric Animations / 251020

    https://sasj.tumblr.com/post/797957303293952000

    This generative artwork features an abstract arrangement of overlapping geometric shapes, including circles, diamonds, and irregular polygons. It uses a vibrant color palette of magenta, yellow, orange, and light yellow, creating a visually engaging composition with a mix of solid and translucent forms.ALT

    Geometric Animations / 251020

    https://sasj.tumblr.com/post/797957303293952000


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  • [personal profile] mjg59
    Tags:
    • advogato,
    • fedora
    posted @ 03:45 pm

    Where are we on X Chat security?

    AWS had an outage today and Signal was unavailable for some users for a while. This has confused some people, including Elon Musk, who are concerned that having a dependency on AWS means that Signal could somehow be compromised by anyone with sufficient influence over AWS (it can't). Which means we're back to the richest man in the world recommending his own "X Chat", saying The messages are fully encrypted with no advertising hooks or strange “AWS dependencies” such that I can’t read your messages even if someone put a gun to my head.

    Elon is either uninformed about his own product, lying, or both.

    As I wrote back in June, X Chat genuinely end-to-end encrypted, but ownership of the keys is complicated. The encryption key is stored using the Juicebox protocol, sharded between multiple backends. Two of these are asserted to be HSM backed - a discussion of the commissioning ceremony was recently posted here. I have not watched the almost 7 hours of video to verify that this was performed correctly, and I also haven't been able to verify that the public keys included in the post were the keys generated during the ceremony, although that may be down to me just not finding the appropriate point in the video (sorry, Twitter's video hosting doesn't appear to have any skip feature and would frequently just sit spinning if I tried to seek to far and I should probably just download them and figure it out but I'm not doing that now). With enough effort it would probably also have been possible to fake the entire thing - I have no reason to believe that this has happened, but it's not externally verifiable.

    But let's assume these published public keys are legitimately the ones used in the HSM Juicebox realms[1] and that everything was done correctly. Does that prevent Elon from obtaining your key and decrypting your messages? No.

    On startup, the X Chat client makes an API call called GetPublicKeysResult, and the public keys of the realms are returned. Right now when I make that call I get the public keys listed above, so there's at least some indication that I'm going to be communicating with actual HSMs. But what if that API call returned different keys? Could Elon stick a proxy in front of the HSMs and grab a cleartext portion of the key shards? Yes, he absolutely could, and then he'd be able to decrypt your messages.

    (I will accept that there is a plausible argument that Elon is telling the truth in that even if you held a gun to his head he's not smart enough to be able to do this himself, but that'd be true even if there were no security whatsoever, so it still says nothing about the security of his product)

    The solution to this is remote attestation - a process where the device you're speaking to proves its identity to you. In theory the endpoint could attest that it's an HSM running this specific code, and we could look at the Juicebox repo and verify that it's that code and hasn't been tampered with, and then we'd know that our communication channel was secure. Elon hasn't done that, despite it being table stakes for this sort of thing (Signal uses remote attestation to verify the enclave code used for private contact discovery, for instance, which ensures that the client will refuse to hand over any data until it's verified the identity and state of the enclave). There's no excuse whatsoever to build a new end-to-end encrypted messenger which relies on a network service for security without providing a trustworthy mechanism to verify you're speaking to the real service.

    We know how to do this properly. We have done for years. Launching without it is unforgivable.

    [1] There are three Juicebox realms overall, one of which doesn't appear to use HSMs, but you need at least two in order to obtain the key so at least part of the key will always be held in HSMs

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  • alierak: (Default)
    [personal profile] alierak posting in [site community profile] dw_maintenance
    posted @ 10:11 am

    AWS outage

    DW is seeing some issues due to today's Amazon outage. For right now it looks like the site is loading, but it may be slow. Some of our processes like notifications and journal search don't appear to be running and can't be started due to rate limiting or capacity issues. DW could go down later if Amazon isn't able to improve things soon, but our services should return to normal when Amazon has cleared up the outage.

    Edit: all services are running as of 16:12 CDT, but there is definitely still a backlog of notifications to get through.

    Edit 2: and at 18:20 CDT everything's been running normally for about the last hour.

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  • Oct. 19th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 08:38 pm

    Geometric Shapes / 251019

    https://sasj.tumblr.com/post/797860547342352384

    This generative artwork features an abstract composition of overlapping geometric lines, circles, and polygonal shapes. It uses a vibrant color palette of purple, yellow, teal, and black, creating a visually dynamic and intricate pattern reminiscent of a stylized map or interconnected network.ALT

    Geometric Shapes / 251019

    https://sasj.tumblr.com/post/797860547342352384


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  • Oct. 18th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 10:39 pm

    Geometric Shapes / 251018

    https://sasj.tumblr.com/post/797777581277593600

    This generative artwork features an abstract composition of overlapping geometric lines, arcs, and angular shapes. It uses a bold color palette of red, green, purple, and black, creating a visually dynamic and intricate pattern with sharp intersections and fluid curves.ALT

    Geometric Shapes / 251018

    https://sasj.tumblr.com/post/797777581277593600


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  • Oct. 17th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 06:07 pm

    Geometric Shapes / 251017

    https://sasj.tumblr.com/post/797669864504492032

    This generative artwork features an abstract composition of interconnected lines and geometric shapes, resembling a stylized map or circuit diagram. It uses a vibrant color palette of pink, blue, orange, and black, creating a visually dynamic and intricate pattern with smooth curves and sharp angles.ALT

    Geometric Shapes / 251017

    https://sasj.tumblr.com/post/797669864504492032


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  • Oct. 16th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 05:47 pm

    Geometric Shapes / 251016

    https://sasj.tumblr.com/post/797578003014156288

    This generative artwork features an abstract composition of overlapping geometric lines, circles, and polygonal shapes. It uses a minimalist color palette of teal, orange, red, and black, creating a visually intricate and dynamic pattern reminiscent of interconnected networks or stylized diagrams.ALT

    Geometric Shapes / 251016

    https://sasj.tumblr.com/post/797578003014156288


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  • Oct. 15th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 09:43 pm

    Geometric Shapes / 251015

    https://sasj.tumblr.com/post/797502260213137408

    This generative artwork features an abstract composition of interconnected lines and geometric shapes, resembling a stylized map or circuit. It uses a vibrant color palette of red, yellow, black, and beige, creating a visually dynamic and intricate pattern with smooth curves and sharp angles.ALT

    Geometric Shapes / 251015

    https://sasj.tumblr.com/post/797502260213137408


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  • Oct. 14th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 10:15 pm

    Geometric Shapes / 251014

    https://sasj.tumblr.com/post/797413665961902080

    This generative artwork features an abstract composition of interconnected geometric lines forming squares, diamonds, and angular shapes. It uses a vibrant color palette of teal, orange, purple, and black, creating a visually intricate and dynamic pattern reminiscent of a stylized circuit or map.ALT

    Geometric Shapes / 251014

    https://sasj.tumblr.com/post/797413665961902080


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  • Oct. 13th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 09:45 pm

    Geometric Shapes / 251013

    https://sasj.tumblr.com/post/797321162694770688

    This generative artwork features an abstract composition of overlapping geometric lines and shapes, including squares, diamonds, and intersecting angles. It uses a vibrant color palette of purple, teal, blue, and black, creating a visually intricate and dynamic pattern with a sense of movement and layered complexity.ALT

    Geometric Shapes / 251013

    https://sasj.tumblr.com/post/797321162694770688


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  • Oct. 12th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 08:49 pm

    Geometric Shapes / 251012

    https://sasj.tumblr.com/post/797227083955830784

    This generative artwork features a grid-based composition of geometric shapes, including triangles, diamonds, ovals, and rectangles. It uses a vibrant color palette of red, blue, teal, black, and white, creating a visually dynamic and intricate pattern with sharp contrasts and rhythmic repetition.ALT

    Geometric Shapes / 251012

    https://sasj.tumblr.com/post/797227083955830784


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  • Oct. 11th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 11:31 pm

    Geometric Shapes / 251011

    https://sasj.tumblr.com/post/797146659658383360

    This generative artwork features a vibrant grid-based composition of geometric shapes, including triangles, rectangles, and diagonal lines. It uses a bold color palette of maroon, pink, yellow, black, and white, creating a dynamic and visually engaging pattern with sharp contrasts and rhythmic repetition.ALT

    Geometric Shapes / 251011

    https://sasj.tumblr.com/post/797146659658383360


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  • Oct. 10th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 09:36 pm

    Geometric Shapes / 251010

    https://sasj.tumblr.com/post/797048842959929344

    This generative artwork features a complex grid of geometric shapes, including circles, triangles, and intersecting lines. It uses a bold color palette of pink, blue, gray, and white, creating a visually striking and intricate pattern with a mix of sharp anglesALT

    Geometric Shapes / 251010

    https://sasj.tumblr.com/post/797048842959929344


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  • Oct. 9th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 07:47 pm

    Geometric Shapes / 251009

    https://sasj.tumblr.com/post/796951360264421376

    This generative artwork features a grid-based composition of geometric shapes, including diamonds, zigzags, and rectangular forms. It uses a bold color palette of red, yellow, black, and white, creating a visually striking and dynamic pattern with sharp contrasts and rhythmic repetition.ALT

    Geometric Shapes / 251009

    https://sasj.tumblr.com/post/796951360264421376


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  • Oct. 8th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 08:30 pm

    Geometric Shapes / 251008

    https://sasj.tumblr.com/post/796863484518383616

    This generative artwork features a grid-based composition of geometric shapes, including diamonds, zigzags, and rectangular forms. It uses a bold color palette of red, yellow, black, and white, creating a visually striking and dynamic pattern with sharp contrasts and rhythmic repetition.ALT

    Geometric Shapes / 251008

    https://sasj.tumblr.com/post/796863484518383616


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  • Oct. 7th, 2025
  • [syndicated profile] sasj_tumblr_feed
    posted @ 10:31 pm

    Geometric Shapes / 251007

    https://sasj.tumblr.com/post/796780491677253632

    This generative artwork features a grid-based composition of geometric shapes, including diagonal lines, arcs, and rectangular forms. It uses a bold color palette of purple, orange, white, and teal, creating a visually striking and dynamic interplay of angular and curved patterns.ALT

    Geometric Shapes / 251007

    https://sasj.tumblr.com/post/796780491677253632


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