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A Nice Little Cryptography Primer

By itss | 28/06/2021
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Pun Intended.

Category: Technology
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  • That Bell Labs 'Unix' Tape from 1974: From a Closet to Computing History
    by EditorDavid on 11/01/2026 at 3:34 pm

    Remember that re-discovered computer tape with one of the earliest versions of Unix from the early 1970s? This week several local news outlets in Utah reported on the find, with KSL creating a video report with shots of the tape arriving at Silicon Valley's Computer History Museum, the closet where it was found, and even its handwritten label. The Salt Lake Tribune reports that the closet where it was found also contained "old cords from unknown sources and mountains of papers that had been dumped from a former professor's file cabinet, including old drawings from his kids and saved plane ticket stubs." (Their report also includes a photo of the University of Utah team that found the tape — the University's Flux Research Group). Professor Robert Ricci believes only 20 copies were ever produced of the version of Unix on that tape: At the time, in the 1970s, Ricci estimates there would have been maybe two or three of those computers — called a PDP-11, or programmed data processor — in Utah that could have run UNIX V4, including the one at the U. Having that technology is part of why he believes the U. got a copy of the rare software. The other part was the distinguished computing faculty at the school. The new UNIX operating system would've been announced at conferences in the early 1970s, and a U. professor at the time named Martin Newell frequently attended those because of his own recognized work in the field, Ricci said. In another box, stuffed in under manila envelopes, [researcher Aleks] Maricq found a 1974 letter written to Newell from Ken Thompson at Bell Labs that said as soon as "a new batch comes from the printers, I will send you the system." Ricci and Maricq are unsure if the software was ever used. They reached out to Newell, who is now 72 and retired, as well as some of his former students. None of them recalled actually running it through the PDP-11... The late Jay Lepreau also worked at the U.'s computing department and created the Flux Research Group that Ricci, Maricq and [engineering research associate Jon] Duerig are now part of. Lepreau overlapped just barely with Newell's tenure. In 1978, Lepreau and a team at the U. worked with a group at the University of California, Berkeley. Together, they built their own clone of the UNIX operating system. They called it BSD, or Berkeley Standard Deviation. Steve Jobs, the former CEO of Apple, worked with BSD, too, and it influenced his work. Ultimately, it was Lepreau who saved the 9-track tape with the UNIX system on it in his U. office. And he's why the university still has it today. "He seems to have found it and decided it was worth keeping," Ricci said... The U. will also get the tape back from the museum. Maricq said it will likely be displayed in the university's new engineering building that's set to open in January 2027. That's why, the research associate said, he was cleaning out the storage room to begin with — to try to prepare for the move. He was mostly just excited to see the floor again. "I thought we'd find some old stuff, but I didn't think it'd be anything like this," he said. And Maricq still has boxes to go through, including more believed to be from Lepreau's office. Local news station KMYU captured the thoughts of some of the University researchers who found the tape: "When you see the very first beginnings of something, and you go from seed to sapling, that's what we saw here," [engineering research associate Jon] Duerig said. "We see this thing in the moment of flux. We see the signs of all the things changing — of all the things developing that we now see today." Duerig also gave this comment to local news station KSL. "The coolest thing is that anybody, anywhere in the world can now access this, right? People can go on the internet archive and download the raw tape file and simulate running it," Duerig said. "People have posted browsable directory trees of the whole thing." One of the museum's directors said the tape's recovery marked a big day for the museum "One of the things that was pretty exciting to us is that just that there is this huge community of people around the world who were excited to jump on the opportunity to look at this piece of history," Ricci said. "And it was really cool that we were able to share that." Duerig said while there weren't many comments or footnotes from the programmers of that time, they did discovery more unexpected content having to do with Bell Labs on the tape. "There were survey results of them actually asking survey questions of their employees at these operator centers," he said. Thanks to long-time Slashdot reader walterbyrd for sharing the news. Read more of this story at Slashdot.

  • Cory Doctorow: Legalising Reverse Engineering Could End 'Enshittification'
    by EditorDavid on 11/01/2026 at 12:34 pm

    Scifi author/tech activist Cory Doctorow has decried the "enshittification" of our technologies to extract more profit. But Saturday he also described what could be "the beginning of the end for enshittification" in a new article for the Guardian — "our chance to make tech good again". There is only one reason the world isn't bursting with wildly profitable products and projects that disenshittify the US's defective products: its (former) trading partners were bullied into passing an "anti-circumvention" law that bans the kind of reverse-engineering that is the necessary prelude to modifying an existing product to make it work better for its users (at the expense of its manufacturer)... Post-Brexit, the UK is uniquely able to seize this moment. Unlike our European cousins, we needn't wait for the copyright directive to be repealed before we can strike article 6 off our own law books and thereby salvage something good out of Brexit... Until we repeal the anti-circumvention law, we can't reverse-engineer the US's cloud software, whether it's a database, a word processor or a tractor, in order to swap out proprietary, American code for robust, open, auditable alternatives that will safeguard our digital sovereignty. The same goes for any technology tethered to servers operated by any government that might have interests adverse to ours — say, the solar inverters and batteries we buy from China. This is the state of play at the dawn of 2026. The digital rights movement has two powerful potential coalition partners in the fight to reclaim the right of people to change how their devices work, to claw back privacy and a fair deal from tech: investors and national security hawks. Admittedly, the door is only open a crack, but it's been locked tight since the turn of the century. When it comes to a better technology future, "open a crack" is the most exciting proposition I've heard in decades. Thanks to Slashdot reader Bruce66423 for sharing the article. Read more of this story at Slashdot.

  • C# (and C) Grew in Popularity in 2025, Says TIOBE
    by EditorDavid on 11/01/2026 at 8:34 am

    For a quarter century, the TIOBE Index has attempted to rank the popularity of programming languages by the number of search engine results they bring up — and this week they had an announcement. Over the last year the language showing the largest increase in its share of TIOBE's results was C#. TIOBE founder/CEO Paul Jansen looks back at how C++ evolved: From a language-design perspective, C# has often been an early adopter of new trends among mainstream languages. At the same time, it successfully made two major paradigm shifts: from Windows-only to cross-platform, and from Microsoft-owned to open source. C# has consistently evolved at the right moment. For many years now, there has been a direct battle between Java and C# for dominance in the business software market. I always assumed Java would eventually prevail, but after all this time the contest remains undecided. It is an open question whether Java — with its verbose, boilerplate-heavy style and Oracle ownership — can continue to keep C# at bay. While C# remains stuck in the same #5 position it was in a year ago, its share of TIOBE's results rose 2.94% — the largest increase of the 100 languages in their rankngs. But TIOBE's CEO notes that his rankings for the top 10 highest-scoring languages delivered "some interesting movements" in 2025: C and C++ swapped positions. [C rose to the #2 position — behind Python — while C++ dropped from #2 to the #4 rank that C held in January of 2025]. Although C++ is evolving faster than ever, some of its more radical changes — such as the modules concept — have yet to see widespread industry adoption. Meanwhile, C remains simple, fast, and extremely well suited to the ever-growing market of small embedded systems. Even Rust has struggled to penetrate this space, despite reaching an all-time high of position #13 this month. So who were the other winners of 2025, besides C#? Perl made a surprising comeback, jumping from position #32 to #11 and re-entering the top 20. Another language returning to the top 10 is R, driven largely by continued growth in data science and statistical computing. Of course, where there are winners, there are also losers. Go appears to have permanently lost its place in the top 10 during 2025. The same seems true for Ruby, which fell out of the top 20 and is unlikely to return anytime soon. What can we expect from 2026? I have a long history of making incorrect predictions, but I suspect that TypeScript will finally break into the top 20. Additionally, Zig, which climbed from position #61 to #42 in 2025, looks like a strong candidate to enter the TIOBE top 30. Here's how TIOBE estimated the 10 most popularity programming languages at the end of 2025 PythonCJavaC++C#JavaScriptVisual BasicSQLDelphi/Object PascalR Read more of this story at Slashdot.

  • Elon Musk: X's New Algorithm Will Be Made Open Source in Seven Days
    by EditorDavid on 11/01/2026 at 5:34 am

    "We will make the new ð algorithm...open source in 7 days," Elon Musk posted Saturday on X.com. Musk says this is "including all code used to determine what organic and advertising posts are recommended to users," and "This will be repeated every 4 weeks, with comprehensive developer notes, to help you understand what changed." Some context from Engadget: Musk has been making promises of open-sourcing the algorithm since his takeover of Twitter, and in 2023 published the code for the site's "For You" feed on GitHub. But the code wasn't all that revealing, leaving out key details, according to analyses at the time. And it hasn't been kept up to date. Bloomberg also reported on Saturday's announcement: The billionaire didn't say why X was making its algorithm open source. He and the company have clashed several times with regulators over content being shown to users. Some X users had previously complained that they were receiving fewer posts on the social media platform from people they follow. In October, Musk confirmed in a post on X that the company had found a "significant bug" in the platform's "For You" algorithm and pledged a fix. The company has also been working to incorporate more artificial intelligence into its recommendation algorithm for X, using Grok, Musk's artificial intelligence chatbot... In September, Musk wrote that the goal was for X's recommendation engine to "be purely AI" and that the company would share its open source algorithm about every two weeks. "To the degree that people are seeing improvements in their feed, it is not due to the actions of specific individuals changing heuristics, but rather increasing use of Grok and other AI tools," Musk wrote in October. The company was working to have all of the more than 100 million daily posts published to X evaluated by Grok, which would then offer individual users the posts most likely to interest them, Musk wrote. "This will profoundly improve the quality of your feed." He added that the company was planning to roll out the new features by November. Read more of this story at Slashdot.

  • Nature-Inspired Computers Are Shockingly Good At Math
    by EditorDavid on 11/01/2026 at 2:34 am

    An R&D lab under America's Energy Department annnounced this week that "Neuromorphic computers, inspired by the architecture of the human brain, are proving surprisingly adept at solving complex mathematical problems that underpin scientific and engineering challenges." Phys.org publishes the announcement from Sandia National Lab: In a paper published in Nature Machine Intelligence, Sandia National Laboratories computational neuroscientists Brad Theilman and Brad Aimone describe a novel algorithm that enables neuromorphic hardware to tackle partial differential equations, or PDEs — the mathematical foundation for modeling phenomena such as fluid dynamics, electromagnetic fields and structural mechanics. The findings show that neuromorphic computing can not only handle these equations, but do so with remarkable efficiency. The work could pave the way for the world's first neuromorphic supercomputer, potentially revolutionizing energy-efficient computing for national security applications and beyond... "We're just starting to have computational systems that can exhibit intelligent-like behavior. But they look nothing like the brain, and the amount of resources that they require is ridiculous, frankly," Theilman said.For decades, experts have believed that neuromorphic computers were best suited for tasks like recognizing patterns or accelerating artificial neural networks. These systems weren't expected to excel at solving rigorous mathematical problems like PDEs, which are typically tackled by traditional supercomputers. But for Aimone and Theilman, the results weren't surprising. The researchers believe the brain itself performs complex computations constantly, even if we don't consciously realize it. "Pick any sort of motor control task — like hitting a tennis ball or swinging a bat at a baseball," Aimone said. "These are very sophisticated computations. They are exascale-level problems that our brains are capable of doing very cheaply..." Their research also raises intriguing questions about the nature of intelligence and computation. The algorithm developed by Theilman and Aimone retains strong similarities to the structure and dynamics of cortical networks in the brain. "We based our circuit on a relatively well-known model in the computational neuroscience world," Theilman said. "We've shown the model has a natural but non-obvious link to PDEs, and that link hasn't been made until now — 12 years after the model was introduced." The researchers believe that neuromorphic computing could help bridge the gap between neuroscience and applied mathematics, offering new insights into how the brain processes information. "Diseases of the brain could be diseases of computation," Aimone said. "But we don't have a solid grasp on how the brain performs computations yet." If their hunch is correct, neuromorphic computing could offer clues to better understand and treat neurological conditions like Alzheimer's and Parkinson's. Read more of this story at Slashdot.

  • Four More Tech Bloggers Are Switching to Linux
    by EditorDavid on 10/01/2026 at 10:34 pm

    Is there a trend? This week four different articles appeared on various tech-news sites with an author bragging about switching to Linux. "Greetings from the year of Linux on my desktop," quipped the Verge's senior reviews editor, who finally "got fed up and said screw it, I'm installing Linux." They switched to CachyOS — just like this writer for the videogame magazine Escapist: I've had a fantastic time gaming on Linux. Valve's Windows-to-Linux translation layer, Proton, and even CachyOS' bundled fork have been working just fine. Of course, it's not perfect, and there's been a couple of instances where I've had to problem-solve something, but most of the time, any issues gaming on Linux have been fixed by swapping to another version of Proton. If you're deep in online games like Fortnite, Call of Duty, Destiny 2, GTAV or Battlefield 6, it might not be the best option to switch. These games feature anti-cheats that look for versions of Windows or even the heart of the OS, the kernel, to verify the system isn't going to mess up someone's game.... CachyOS is thankfully pre-packed with Nvidia drivers, meaning I didn't have to dance around trying to find them.... Certain titles will perform worse than their counterparts, simply due to how the bods at Nvidia are handling the drivers for Linux. This said, I'm still not complaining when I'm pushing nearly 144fps or more in newer games. The performance hit is there, but it's nowhere near enough to stave off even an attempt to mess about with Linux. Do you know how bizarre it is to say it's "nice to have a taskbar again"? I use macOS daily for a lot of my work, which uses a design baked back in the 1990s through NeXT. Seeing just a normal taskbar that doesn't try to advertise to me or crash because an update killed it for some reason is fantastic. That's how bad it is out there right now for Windows. "I run Artix, by the way," joked a senior tech writer at Notebookcheck (adding "There. That's out of the way...") I dual-booted a Linux partition for a few weeks. After a Windows update (that I didn't choose to do) wiped that partition and, consequently, the Linux installation, I decided to go whole-hog: I deleted Windows 11 and used the entire drive for Linux... Artix differs from Arch in that it does not use SystemD as its init system. I won't go down the rabbit hole of init systems here, but suffice it to say that Artix boots lightning quick (less than 10 seconds from a cold power on) and is pretty light on system resources. However, it didn't come "fully assembled..." The biggest problem I ran into after installing Artix on the [MacBook] Air was the lack of wireless drivers, which meant that WiFi did not work out of the box. The resolution was simple: I needed to download the appropriate WiFi drivers (Broadcom drivers, to be exact) from Artix's main repository. This is a straightforward process handled by a single command in the Terminal, but it requires an internet connection... which my laptop did not have. Ultimately, I connected a USB-to-Ethernet adapter, plugged the laptop directly into my router, and installed the WiFi drivers that way. The whole process took about 10 minutes, but it was annoying nonetheless. For the record, my desktop (an AMD Ryzen 7 6800H-based system) worked flawlessly out-of-the-box, even with my second monitor's uncommon resolution (1680x1050, vertical orientation). I did run into issues with installing some packages on both machines. Trying to install the KDE desktop environment (essentially a different GUI for the main OS) resulted in strange artifacts that put white text on white backgrounds in the menus, and every resolution I tried failed to correct this bug. After reverting to XFCE4 (the default desktop environment for my Artix install), the WiFi signal indicator in the taskbar disappeared. This led to me having to uninstall a network manager installed by KDE and re-linking the default network manager to the runit services startup folder. If that sentence sounds confusing, the process was much more so. It has been resolved, and I have a WiFi indicator that lets me select wireless networks again, but only after about 45 minutes of reading manuals and forum posts. Other issues are inherent to Linux. Not all games on Steam that are deemed Linux compatible actually are. Civilization III Complete is a good example: launching the game results in the map turning completely black. (Running the game through an application called Lutris resolved this issue.) Not all the software I used on Windows is available in Linux, such as Greenshot for screenshots or uMark for watermarking photos in bulk. There are alternatives to these, but they don't have the same features or require me to relearn workflows... Linux is not a "one and done" silver bullet to solve all your computer issues. It is like any other operating system in that it will require users to learn its methods and quirks. Admittedly, it does require a little bit more technical knowledge to dive into the nitty-gritty of the OS and fully unlock its potential, but many distributions (such as Mint) are ready to go out of the box and may never require someone to open a command line... [T]he issues I ran into on Linux were, for the most part, my fault. On Windows or macOS, most problems I run into are caused by a restriction or bug in the OS. Linux gives me the freedom to break my machine and fix it again, teaching me along the way. With Microsoft's refusal (either from pride or ignorance) to improve (or at least not crapify) Windows 11 despite loud user outrage, switching to Linux is becoming a popular option. It's one you should consider doing, and if you've been thinking about it for any length of time, it's time to dive in. And tinkerer Kevin Wammer switched from MacOS to Linux, saying "Linux has come a long way" after more than 30 years — but "Windows still sucks..." Read more of this story at Slashdot.

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