Author Archives: pappp

Adding a Russian Keyboard to Protect against Ransomware

Source: Schneier on Security

Article note: That's hilarious, clever, and a little cynical.

A lot of Russian malware — the malware that targeted the Colonial Pipeline, for example — won’t install on computers with a Cyrillic keyboard installed. Brian Krebs wonders if this could be a useful defense:

In Russia, for example, authorities there generally will not initiate a cybercrime investigation against one of their own unless a company or individual within the country’s borders files an official complaint as a victim. Ensuring that no affiliates can produce victims in their own countries is the easiest way for these criminals to stay off the radar of domestic law enforcement agencies.

[…]

DarkSide, like a great many other malware strains, has a hard-coded do-not-install list of countries which are the principal members of the Commonwealth of Independent States (CIS) — former Soviet satellites that mostly have favorable relations with the Kremlin.

[…]

Simply put, countless malware strains will check for the presence of one of these languages on the system, and if they’re detected the malware will exit and fail to install.

[…]

Will installing one of these languages keep your Windows computer safe from all malware? Absolutely not. There is plenty of malware that doesn’t care where in the world you are. And there is no substitute for adopting a defense-in-depth posture, and avoiding risky behaviors online.

But is there really a downside to taking this simple, free, prophylactic approach? None that I can see, other than perhaps a sinking feeling of capitulation. The worst that could happen is that you accidentally toggle the language settings and all your menu options are in Russian.

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Recovering “lost” treasure-filled floppy discs with an oscilloscope

Source: Hacker News

Article note: This is super cool. I've been thinking I should pick up a FluxEngine or one of the later Greaseweazle variants to ease dealing with my pile of ancient hardware, but this goes well past.
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The man who didn’t invent Flamin’ Hot Cheetos

Source: Hacker News

Article note: That is some impressive bullshitting/ladder climbing feedback loop. Like a staggering but unsurprising faction of such things.
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Mac the Knife

Source: Hacker News

Article note: Oooh, MAME is getting some serious work to make its Mac cores usable.
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A paradigm shift to combat indoor respiratory infection

Source: Hacker News

Article note: Our buildings should be better ventilated for a bunch of reasons, the pandemic transmitting on lingering ultra fine particles just showed how bad it was. Everything is under-ventilated and in too coarse an area. Office stank and kennel cough. Meeting rooms that should have CO2 detectors that show how impaired the occupants are. Etc. It's expensive for institutions to have their building ventilation not be awful, and peons suffer the bulk of the consequences, so it's something that's hard to get fixed in the state of our society.
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Battlestar Galactica Lessons from Ransomware to the Pandemic

Source: Hacker News

Article note: I always hear the "You hooked it up to the phone, didn't you? Dade! Turn the shower off! You screw up again and you won't get into college!" line from the beginning of Hackers (1995) when I look at IoT crap, but BSG is probably a more timely reference. Incomprehensible, homogeneous, unattended, and distributed systems(in, to make another reference, the Leslie Lamport "A distributed system is one in which the failure of a computer you didn't even know existed can render your own computer unusable." sense) inserted into critical tasks are an _enormous_ problem, and come with a ton of perverse incentives.
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Reverse Engineering an Unknown Microcontroller

Source: Hacker News

Article note: That's very cool, with excellent process docs for figuring out uCs. I like that it's written in a way that my better 287 students could follow after they finish the class, but still exposes enough detail to be substantial.
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Why Aren’t SMS Interventions Designed to Boost College Success Working at Scale?

Source: Hacker News

Article note: "A study found that novel, personalized, and interactive interventions improved student outcomes; why aren't one-way impersonal corporate-speak messages broadcast by a robot on a now-saturated advertising channel having the same effect?"
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Air-Assist Analysis Reveals Most Effective — and Quietest — Methods

Source: Hack a Day

Article note: This is an experiment I've been wanting to do for _years_, I love that someone who isn't me spent the thousand-odd dollars on it. I would have liked to see an airbrush compressor in the test set, but small detail. Those aquaculture pumps are apparently as promising as they look.

If there’s one thing that continues to impress us about the Hackaday community as the years roll by, it’s the willingness to share what we’ve learned with each other. Not every discovery will be news to everyone, and everything won’t be helpful or even interesting to everyone, but the mere act of sharing on the off chance that it’ll help someone else is really what sets the hardware hacking world apart.

Case in point: this in-depth analysis of laser cutter air-assist methods. Undertaken by [David Tucker], this project reads more like a lab writeup than a build log, because well, that’s pretty much what it is. For those not into laser cutters, an air assist is just a steady flow of air to blow smoke and cutting residue away from the beam path and optics of a laser cutter. It’s simple, but critical; without it, smoke can obscure and reflect the laser beam, foul lenses and mirrors, and severely degrade cut quality.

To see what air-assist methods work best, [David] looked at four different air pumps and compressors, along with a simple fan. Each of these methods was compared to a control of cuts made without air assist. The test was simple: a series of parallel lines cut into particle board with the beam focused on the surface at 80% power, with the cut speed slowly decreasing. It turned out that any air-assist was better than nothing, with the conspicuous exception of using just a fan, which made things worse. Helpfully, [David] included measurements of the noise levels of the compressors he tested, and found there’s no advantage to using an ear-splitting shop compressor over a quieter aquarium air pump. Plus, the aquarium pumps are cheap — always a bonus.

Not sure how to get up to speed with lasers? Laser Cutting 101 might be a great place to start.

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60% of school apps are sending student data with third parties without consent

Source: Hacker News

Article note: Oh ed-tech carpetbaggers, they never miss an opportunity to rent-seek. The maxim that the greater the separation between the people making purchasing decisions (district bureaucrats or deanlets) and using the software (instructors, students), the less suitable it will be.
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