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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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  • Scientists Create a New Form of Ice At 2,357 Degrees Celsius
    by BeauHD on 12/09/2026 at 1:00 pm

    Longtime Slashdot reader fahrbot-bot shares a report from ScienceAlert: Scientists have now demonstrated one of the weirdest forms of ice yet -- under preposterous pressures up to 2.3 million atmospheres, and tremendous temperatures up to 2,630 kelvins (2,357 degrees Celsius, or 4,274 degrees Fahrenheit). [...] In their new experiments, a team led by physicist Alexis Forestier of the French Alternative Energies and Atomic Energy Commission subjected tiny samples of water to the sorts of extreme conditions expected in the interiors of ice giant planets. They squeezed the samples between the tips of diamonds to pressures as high as 230 gigapascals, while using lasers to heat them to thousands of degrees. That's 2.3 million times Earth's atmospheric pressure at sea level â" the pressure at the center of Earth, for context, is around 360 gigapascals. Then, using an extremely narrow beam of synchrotron X-rays, they probed for changes in the crystal structure of the ice. What emerged was a configuration predicted theoretically but never unambiguously observed in experiments: hexagonal close-packed, or hcp, ice. As the hcp crystal was heated, its expansion also showed a signature of superionic behavior, suggesting it entered the superionic state at around 1,700 kelvins. [Superionic ice is thought to exist deep inside Uranus and Neptune, where its unusual properties may play a role in generating the planets' equally unusual magnetic fields.] The findings have been published in Physical Review Letters. Read more of this story at Slashdot.

  • Little Mercury May Be Shrinking Faster Than Scientists Expected
    by BeauHD on 12/09/2026 at 9:00 am

    A new study suggests Mercury may have shrunk about 30% more than scientists previously thought, losing as much as 14 miles in diameter as its interior cooled and contracted over billions of years. "That's significant for a planet barely 3,000 miles (4,900 kilometers) across," reports the Associated Press. From the report: Mercury's rough surface, continually reshaped by debris hurled from impact craters, may have hidden the true extent of the loss, according to the researchers whose findings appear in the journal Geophysical Research Letters. The news comes one week after a pair of European and Japanese spacecraft shed its cruising platform and advanced toward Mercury. Known as BepiColombo, the linked craft are expected to enter orbit around Mercury in November before splitting up for a fuller survey. BepiColombo's laser instrument should confirm how much Mercury is withering as a result of internal cooling, said Gaku Nishiyama, the study's lead author who is taking part in the space mission. The shrinkage could be even more than his team is estimating based on measurements from NASA's Messenger spacecraft in the 2010s. Only one other spacecraft has ever visited Mercury, NASA's Mariner 10 in the 1970s. Read more of this story at Slashdot.

  • Can Red-Light Therapy Treat Brain Injuries?
    by BeauHD on 12/09/2026 at 5:00 am

    The Athletic reports that researchers at the University of Utah are studying itPBM, a medical-grade red-light therapy that has shown promising signs of reducing brain inflammation and improving cognition, mood, anxiety, motor performance and neural connectivity. The report centers in part on former BYU football star and University of Utah adjunct professor Larry Carr, who says the treatment helped him after years of brain damage from repeated head impacts. An anonymous reader shares an excerpt from the report: ... The knife, the call, the diagnosis in 2013, would lead [Carr] on a life-changing mission -- one in which he and a team of researchers at the University of Utah would eventually compile research that one of those researchers, Elisabeth Wilde, Ph.D, co-director of the Traumatic Brain Injury (TBI) and Concussion Center, calls "striking." The treatment they are studying is called photobiomodulation therapy, or itPBM (intranasal transcranial PBM), also known as red-light therapy. It is different from the kind of superficial red-light usage one can find on social media skincare channels or at a wellness boutique, and its application is broader. The research includes multiple studies, and is not just focused on ex-football players, but on women and men in various walks of life. The group recently published their latest results in the Journal of Neurotrauma, based on a study that followed 26 BYU football players throughout a season, suggesting the treatment could "potentially safeguard neurological health without reduced playing time or contact exposure." Definitive clinical trials haven't been run yet; broader research and validation is required, and some in the field are skeptical. Carr acknowledges some have told him that it could be "too good to be true." Still, other outside experts who spoke with The Athletic call the findings promising. They make sure to caution: This is not a cure-all, and there is much more to be tested. But the findings have been compelling enough to justify more research and more speculation. Researchers say 14 peer-reviewed studies have linked itPBM with improvements in cognition, mood, anxiety, attention, executive function, motor performance, and other measures, while brain imaging has shown reduced inflammation and improved connectivity. One of the most striking findings mentioned in the report came from a study of 26 BYU football players during the 2021 season. Players who did not receive treatment developed significant, widespread brain inflammation, while the treated group showed no comparable increase and even demonstrated reduced inflammation in some brain regions. As researcher Michael Carr put it, "I believe our BYU data suggests the players' brains using itPBM are actually healthier after the season." He added: "That is a first." Carr also said treated participants showed fewer symptoms of depression, anxiety, stress and PTSD, along with faster processing, better sustained attention and stronger executive function. Researchers have also observed improvements in balance, motor control and grip strength. Taken together, the findings suggest itPBM may have a neuroprotective effect. Read more of this story at Slashdot.

  • Male Fruit Fly Brain Trained to Play Doom
    by BeauHD on 12/09/2026 at 1:00 am

    Last week, Google announced that it managed to produce a detailed 3D reconstruction of an adult male fruit fly's brain and central nervous system. A few days later a software engineer at Coinbase said the fly brain was being trained to play the original Doom. "Each Doom frame stimulates sensory neurons," says Alex Wormuth. "Neural activity is mapped to game controls. Damage triggers a stimulus to two PPL101 dopamine cells as reinforcement." Since then, the digital brain model has been repurposed to control other games like Beat Saber and Super Mario 64. PC Gamer reports: You can even watch the fruit fly play in real time via Wormuth's website, and it not only shows the point of view in Doom, but can also show a third-person render of the fly going around Doom maps. As of the time of writing, the fly is on round 6385 and, well, it's not very good. Sorry, fly. But modders aren't done here. They have also somehow managed to make the fruit fly play Beat Saber, and play it pretty well. Lyra Bubbles on X has used the brain and replays of a song in Beat Saber to teach the fruit fly where to hit and why, via Reinforcement Learning. That does mean it's not organically reacting to the notes popping up on screen, but it is receiving input and responding to stimuli. Lyra says, "Further training is to reduce reliance on external signals and allow it to play fully reactively with no input data." And, after "pivoting to fly engineering in 2026", Jessica Paquette also shared on X their experience running the digital fly brain through Super Mario 64. If you think that is all the game's modders made the fruit fly play, think again, as YouTuber Ro0oney even put it in Minecraft. But this time, Ro0oney used Flywire.AI, a similar project made in collaboration with Princeton University. The number of neurons are different (160,000+ vs 139,255), and Google analyzed a male brain whilst Flywire analyzed a female brain, but the basic idea is the same. Read more of this story at Slashdot.

  • PlayStation Ditched Hideo Kojima's 'Physint' on Budget Concerns, Missed Deadlines
    by BeauHD on 11/09/2026 at 10:00 pm

    Sony reportedly pulled PlayStation funding from Hideo Kojima's upcoming espionage game Physint over concerns about its ballooning budget, missed deadlines, profitability, and the fact that it would not remain permanently exclusive to PlayStation. Kojima Productions has since struck a deal with Xbox, which plans to publish the game on both Xbox and PC. It's also secured film and television rights. Bloomberg reports: The new game, Physint, hasn't yet been shown publicly but excited fans when it was announced two years ago with its promise of returning to the "espionage action" genre Kojima pioneered with Metal Gear Solid, the series that propelled him to industry stardom. Kojima surprised fans this week when he announced he would be publishing Physint with PlayStation's biggest rival, Microsoft Corp.'s Xbox. On Wednesday night, Kojima wrote on social media that over the summer his company had "unexpectedly received notice" that PlayStation was pulling out of funding the game. "Physint is an important project both to me personally and to Kojima Productions," he wrote. "Determined to keep the project alive, we have spent the last three months searching tirelessly for a new partner." PlayStation also addressed the split on social media, saying it had made the "difficult decision to step away." Microsoft said it was "honored" that Kojima chose Xbox and that the two teams plan to collaborate beyond games on films and television, too. [...] The decision to part ways with Kojima is a significant move for PlayStation that may have ripple effects. [...] One key factor is the PC platform, where the Death Stranding games have generated some revenue. Earlier this year, Sony decided it will no longer release single-player PlayStation games on PC, Bloomberg reported. Sony would therefore not benefit when Kojima Productions released a PC version of Physint on its own or with a different publisher, as it did for the first Death Stranding. But Xbox releases all of its games on PCs and plans to publish Physint on PC and Xbox, said the people. "Betting on Kojima-san is an easy call," said an Xbox spokesperson. "We believe in his team's ability to build AAA games with groundbreaking, new IP and we believe in OD, Physint, and our growing partnership." Read more of this story at Slashdot.

  • US Legislators Complain About Secretive British Court and Apple Encryption
    by BeauHD on 11/09/2026 at 8:00 pm

    Bruce66423 shares a report from The Guardian: A bipartisan pair of American politicians is telling Britain's most secretive court to stop hiding its handling of Apple's legal fight against a government demand to break into its customers' encrypted data, warning that Whitehall's taste for secrecy is 'needlessly' straining relations between the two allies. The letter (PDF), shared with the Guardian ahead of being sent to the investigatory powers tribunal (IPT) on Friday, is signed by the Democratic senator Ron Wyden of Oregon and the Republican congressman Warren Davidson of Ohio. The row dates back to January 2025, when the Home Office served Apple with a technical capability notice under the Investigatory Powers Act, which requires companies to assist law enforcement in providing evidence. The UK government demanded that Apple provide a mechanism to access encrypted iCloud backups worldwide, a call the company met by withdrawing its Advanced Data Protection encryption feature from UK users the following month. Apple's challenge to that order at the IPT was later thrown out after the Home Office withdrew the original notice and issued a narrower one targeting only British users' data. "It is wholly inappropriate for a foreign executive body to attempt to dictate the distribution of powers within the US government, nor should it be permitted to use secrecy directives under the Investigatory Powers Act to frustrate Article I powers under the US Constitution," the pair wrote. Wyden and Davidson write that Congress "is not only a co-equal branch of government, it is the First Branch," and argue that no government can be allowed to place "its demands beyond the reach of legislative inquiry." "The UK government," they write, "cannot champion legislative oversight at home while using administrative gag orders to kneecap the constitutional authority of the US Congress." Read more of this story at Slashdot.

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