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Cake day: June 1st, 2023

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  • Kata1yst@kbin.socialtoTechnology@lemmy.worldThe decline of Intel..
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    6 months ago

    2009 era was also when Intel leveraged their position in the compiler market to cripple all non-Intel processors. Nearly every benchmarking tool used that complier and put an enormous handicap on AMD processors by locking them to either no SSE or, later, back to SSE2.

    My friends all thought I was crazy for buying AMD, but accusations had started circulating about the complier heavily favoring Intel at least as early as 2005, and they were finally ordered to stop in 2010 by the FTC… Though of course they have been caught cheating in several other ways since.

    Everyone has this picture in their heads of AMD being the scrappy underdog and Intel being the professional choice, but Intel hasn’t really worn the crown since the release of Athlon. Except during Bulldozer/Piledriver, but who can blame AMD for trying something crazy after 10 years of frustration?


  • That’s called ‘privilege escalation’, and replacing system level calls with user level calls is closely watched for and guarded against with many different security measures including SELinux.

    You’ve already outed yourself multiple times in this thread as someone who doesn’t understand how security in the real world works. Take the L and try to learn from this. It’s okay not to understand something. But it’s very important to recognize when that happens and not claim to understand better than someone else.


  • I strongly disagree with your premise. Separating authentication and privilege escalation adds layers of security that are non-trivial and greatly enhance resilience. Many attacks are detected and stopped at privilege escalation, because it happens locally before a user can stop or delete the flow of logs.

    If I get into your non-privileged account I can set up a program that acts like sudo

    No you cannot. A non privileged user doesn’t have the access necessary to run a program that can accomplish this.

    And even if they do it’s too late anyway because I’ve just compromised root and locked everybody out and I’m in there shitting on the filesystems or whatever. Because root can do anything.

    Once again, you didn’t privilege escalate, because once you have a foothold (authentication) you don’t have the necessary privileges, so you must perform reconnaissance to identify an exploitable vector to privilage escalate with. This can be any number of things, but it’s always noisy and slow, usually easy to detect in logs. There is a reason the most sophisticated attacks against well protected targets are “low and slow”.

    And if I can’t break into your non-privileged account then I can’t break into a privileged account either.

    You’re ignoring my points given regarding the risks of compromised keys. If there are no admin keys, there are no remote admin sessions.

    These artificial distinctions between “non-privileged” and “superuser” accounts need to stop. This is not good security, this is not zero trust. Either you don’t trust anybody and enforce explicit privilege escalation for specific things, or just accept that you’re using a “super” paradigm and once you’ve got access to that user all bets are off.

    Spoken like someone who has never red teamed or purple teamed. Even admin accounts are untrusted, given only privileges specific to their role, and closely monitored. That doesn’t mean they should have valid security measures thrown away.


  • Wouldn’t separate SSH keys achieve the same?

    Separate ssh keys for the user and the admin? Yeah, see point 2, admins should not be remotely accessible.

    Really? How, exactly? Break the ssh key authentication? And wouldn’t that apply to all accounts equally?

    Keys aren’t perfect security. They can easily be mishandled, sometimes getting published to GitHub, copied to USB drives which can easily be lost, etc.

    Further, there have been attacks against SSH that let malicious actors connect remotely to any session, or take over existing sessions. By not allowing remote access on privileged accounts, you minimize risk.

    Forcing a non privileged remote session to authenticate with a password establishes a second factor of security that is different from the first. This means a cracked password or a lost key is still not enough for a malicious actor to accomplish administrative privileges.

    A key is something you have

    A password is something you know

    So, by not allowing remote privileged sessions, we’re forcing a malicious actor to take one more non-trivial step before arriving at their goals. A step that will likely be fairly obvious in logs on a monitored machine.







  • “We had a huge chunk of our engineering staff spending time improving FreeBSD as opposed to working on features and functionalities. What’s happened now with the transition to having a Debian basis, the people I used to have 90 percent of their time working on FreeBSD, they’re working on ZFS features now … That’s what I want to see; value add for everybody versus sitting around, implementing something Linux had a years ago. And trying to maintain or backport, or just deal with something that you just didn’t get out of box on FreeBSD.”

    I still hold much love for FreeBSD, but this is very much indicative of my experience with it as well. The tooling in FreeBSD, specifically dtrace, bhyve, jails, and zfs was absolutely killer while Linux was still experiencing teething problems with a nonstandard myriad of half developed and documented tools. But Linux has since then matured, adopted, and standardized. And the strength of the community is second to none.

    They’ll be happier with Linux.





  • My favorite city builder in decades. A few notes.

    Pros:

    • Easy mode is relaxing and quite easy.
    • Medium mode is a fun challenge at first, eventually becoming fairly chill as you advance in skill and confidence.
    • Hard mode is always fairly hard, especially on harder maps.
    • There are many resources to manage, but none that feel burdensome.
    • The game is extremely thematic, it feels alive with charm.
    • Graphics are excellent, though sometimes graphical glitches can still be encountered.
    • The water. It’s so hard to explain to someone who hasn’t encountered this system before, but water is life in this game, and it’s both beautiful graphically, and extremely well simulated by physics. Learning to control the water, and see the shortest paths to end water scarcity with beaver engineering is an amazingly fun and unique aspect of the game.
    • Mods are well supported and the community is vibrant.

    Cons:

    • Not a ton of content. They’ve been very good about adding new mechanics (badwater, extract, etc) but there’s still just 2 races of beaver and a dozen or so maps.
    • No directed experience. In similar games I’ve enjoyed a campaign, challenge maps/scenarios, weekly challenges, a deeper progression system, just… Something to optionally set your goals. There’s nothing of the sort in the vanilla game. It’s fully open ended and there’s only one unlock outside of your progress though the resource tree in a map.

    All in all, I highly recommend it, especially at the modest asking price. If you love city builders, charming and beautiful art, thematic settings, dynamic challenge, and solution engineering, this is a fantastic game for you.

    Other games I’ve enjoyed that scratch similar itches:

    • KSP
    • Cities: Skylines (but Timberborn has been far more compelling)
    • Factorio
    • Mindustry
    • Planet Zoo (Timberborn has less of a directed experience, but is otherwise completely superior)
    • Gnomoria
    • Banished
    • Tropico series (though I view this as more casual)

    Get it and have fun is my recommendation.


  • Author doesn’t seem to understand that executives everywhere are full of bullshit and marketing and journalism everywhere is perversely incentivized to inflate claims.

    But that doesn’t mean the technology behind that executive, marketing, and journalism isn’t game changing.

    Full disclosure, I’m both well informed and undoubtedly biased as someone in the industry, but I’ll share my perspective. Also, I’ll use AI here the way the author does, to represent the cutting edge of Machine Learning, Generative Self-Reenforcement Learning Algorithms, and Large Language Models. Yes, AI is a marketing catch-all. But most people better understand what “AI” means, so I’ll use it.

    AI is capable of revolutionizing important niches in nearly every industry. This isn’t really in question. There have been dozens of scientific papers and case studies proving this in healthcare, fraud prevention, physics, mathematics, and many many more.

    The problem right now is one of transparency, maturity, and economics.

    The biggest companies are either notoriously tight-lipped about anything they think might give them a market advantage, or notoriously slow to adopt new technologies. We know AI has been deeply integrated in the Google Search stack and in other core lines of business, for example. But with pressure to resell this AI investment to their customers via the Gemini offering, we’re very unlikely to see them publicly examine ROI anytime soon. The same story is playing out at nearly every company with the technical chops and cash to invest.

    As far as maturity, AI is growing by astronomical leaps each year, as mathematicians and computer scientists discover better ways to do even the simplest steps in an AI. Hell, the groundbreaking papers that are literally the cornerstone of every single commercial AI right now are “Attention is All You Need” (2017) and
    “Retrieval-Augmented Generation for Knowledge -Intensive NLP Tasks” (2020). Moving from a scientific paper to production generally takes more than a decade in most industries. The fact that we’re publishing new techniques today and pushing to prod a scant few months later should give you an idea of the breakneck speed the industry is going at right now.

    And finally, economically, building, training, and running a new AI oriented towards either specific or general tasks is horrendously expensive. One of the biggest breakthroughs we’ve had with AI is realizing the accuracy plateau we hit in the early 2000s was largely limited by data scale and quality. Fixing these issues at a scale large enough to make a useful model uses insane amounts of hardware and energy, and if you find a better way to do things next week, you have to start all over. Further, you need specialized programmers, mathematicians, and operations folks to build and run the code.
    Long story short, start-ups are struggling to come to market with AI outside of basic applications, and of course cut-throat silicon valley does it’s thing and most of these companies are either priced out, acquired, or otherwise forced out of business before bringing something to the general market.

    Call the tech industry out for the slime is generally is, but the AI technology itself is extremely promising.