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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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  • IMF Warns Global Economic Resilience at Risk if AI Falters
    by msmash on 19/01/2026 at 2:40 pm

    The "surprisingly resilient" global economy is at risk of being disrupted by a sharp reversal in the AI boom, the IMF warned on Monday, as world leaders prepared for talks in the Swiss resort of Davos. From a report: Risks to global economic expansion were "tilted to the downside," the fund said in an update to its World Economic Outlook, arguing that growth was reliant on a narrow range of drivers, notably the US technology sector and the associated equity boom. Nonetheless, it predicted US growth would strongly outpace the rest of the G7 this year, forecasting an expansion of 2.4 per cent in 2026 and 2 per cent in 2027. Tech investment had surged to its highest share of US economic output since 2001, helping drive growth, the IMF found. "There is a risk of a correction, a market correction, if expectations about AI gains in productivity and profitability are not realised," said Pierre-Olivier Gourinchas, IMF chief economist. "We're not yet at the levels of market frothiness, if you want, that we saw in the dotcom period," he added. "But nevertheless there are reasons to be somewhat concerned." Read more of this story at Slashdot.

  • China Birth Rate Falls To Lowest Since 1949
    by msmash on 19/01/2026 at 2:04 pm

    China's birth rate fell to 5.6 per 1,000 people in 2025, the lowest figure since the founding of the People's Republic in 1949, and the country's total population contracted by 3.39 million, the sharpest decline since the Mao Zedong era. The drop marks the fourth straight year of population decline and comes despite government efforts to encourage childbearing, including subsidies of about $500 annually per child born on or after January 1, 2025. Beijing has also imposed a 13% value-added tax on contraceptives this year. The government is betting on automation and productivity to offset the shrinking workforce -- China already leads the world in robot installations -- and President Xi Jinping has written that population policy must transition "from being mainly about regulating quantity to improving quality." Read more of this story at Slashdot.

  • China Consumed 10.4 Trillion Kilowatt-Hours of Electricity In 2025 - Double the US
    by EditorDavid on 19/01/2026 at 12:34 pm

    Slashdot reader hackingbear summarizes this report from Bloomberg: China consumed totally 10.4 trillion kilowatt hours (10.4 petaWh) in 2025 according to data from the National Energy Administration. That's the highest annual electricity use ever recorded by a single country, and doubled the amount used by the US and surpassed the combined annual total of the EU, Russia, India and Japan. The surge in demand for power are results of growth in data centers for artificial intelligence (+17% over 2024) and use of electric vehicles (+48.8%)... However, on a per-capita basis, China uses about 7,300 kWh per person vs about 13,000 kWh per American. More details from Reuters: China's mostly coal-based thermal power generation fell in 2025 for the first time in 10 years, government data showed on Monday, as growing renewable generation met growth in electricity demand even as overall power usage hit a record. The data is a positive signal for the decarbonisation of China's power sector as China sets a course for carbon emissions to peak by 2030... Thermal electricity, generated mostly by coal-fired capacity with a small amount from natural gas, fell 1% in 2025 to 6.29 trillion kilowatt-hours (kWh), according to the National Bureau of Statistics (NBS). It fell more sharply in December, down by 3.2%, from a year earlier, the data showed... [Though the article notes that coal output still edged up to a record high last year.] Hydropower grew at a steady pace, up 4.1% in December and rising 2.8 % for the full year, the NBS data showed. Nuclear power output rose 3.1 in December and 7.7% in 2025, respectively. Thermal power generation is unlikely to accelerate in 2026 as renewables growth continues apace. Read more of this story at Slashdot.

  • More US States are Putting Bitcoin on Public Balance Sheets
    by EditorDavid on 19/01/2026 at 9:02 am

    An anonymous reader shared this report from CNBC: Led by Texas and New Hampshire, U.S. states across the national map, both red and blue in political stripes, are developing bitcoin strategic reserves and bringing cryptocurrencies onto their books through additional state finance and budgeting measures. Texas recently became the first state to purchase bitcoin after a legislative effort that began in 2024, but numerous states have joined the "Reserve Race" to pass legislation that will allow them to ultimately buy cryptocurrencies. New Hampshire passed its crypto strategic reserve law last May, even before Texas, giving the state treasurer the authority to invest up to 5% of the state funds in crypto ETFs, though precious metals such as gold are also authorized for purchase. Arizona passed similar legislation, while Massachusetts, Ohio, and South Dakota have legislation at various stages of committee review... Similarities in the actions taken across states to date include include authorizing the state treasurer or other investment official to allow the investment of a limited amount of public funds in crypto and building out the governance structure needed to invest in crypto... [New Hampshire] became the first state to approve the issuance of a bitcoin-backed municipal bond last November, a $100 million issuance that would mark the first time cryptocurrency is used as collateral in the U.S. municipal bond market. The deal has not taken place yet, though plans are for the issuance to occur this year... "What's different here is it's bitcoin rather than taxpayer dollars as the collateral," [said University of Chicago public policy professor Justin Marlowe]. In numerous states, including, Colorada, Utah, and Louisiana,crypto is now accepted as payment for taxes and other state business... "For many in the state/local investing industry, crypto-backed assets are still far too speculative and volatile for public money," Marlowe said. "But others, and I think there's a sort of generational shift in the works, see it as a reasonable store of value that is actually stronger on many other public sector values like transparency and asset integrity," he added. Public policy professor Marlowe "sees the state-level trend as largely one of signaling at present," according to the article. (Marlowe says "If you're a governor and you want to broadcast that you are amenable to innovative business development in the digital economy, these are relatively low-cost, low-risk ways to send that signal.") But the bigger steps may reflect how crypto advocates have increasing political power in the states. The article notes that the cryptocurrency industry was the largest corporate donor in a U.S. election cycle in 2024, "with support given to candidates on both sides." "It is already amassing a war chest for the 2026 midterms." Read more of this story at Slashdot.

  • Is the Possibility of Conscious AI a Dangerous Myth?
    by EditorDavid on 19/01/2026 at 5:45 am

    This week Noema magazine published a 7,000-word exploration of our modern "Mythology Of Conscious AI" written by a neuroscience professor who directs the University of Sussex Centre for Consciousness Science: The very idea of conscious AI rests on the assumption that consciousness is a matter of computation. More specifically, that implementing the right kind of computation, or information processing, is sufficient for consciousness to arise. This assumption, which philosophers call computational functionalism, is so deeply ingrained that it can be difficult to recognize it as an assumption at all. But that is what it is. And if it's wrong, as I think it may be, then real artificial consciousness is fully off the table, at least for the kinds of AI we're familiar with. He makes detailed arguments against a computation-based consciousness (including "Simulation is not instantiation... If we simulate a living creature, we have not created life.") While a computer may seem like the perfect metaphor for a brain, the cognitive science of "dynamical systems" (and other approaches) reject the idea that minds can be entirely accounted for algorithmically. And maybe actual life needs to be present before something can be declared conscious. He also warns that "Many social and psychological factors, including some well-understood cognitive biases, predispose us to overattribute consciousness to machines." But then his essay reaches a surprising conclusion: As redundant as it may sound, nobody should be deliberately setting out to create conscious AI, whether in the service of some poorly thought-through techno-rapture, or for any other reason. Creating conscious machines would be an ethical disaster. We would be introducing into the world new moral subjects, and with them the potential for new forms of suffering, at (potentially) an exponential pace. And if we give these systems rights, as arguably we should if they really are conscious, we will hamper our ability to control them, or to shut them down if we need to. Even if I'm right that standard digital computers aren't up to the job, other emerging technologies might yet be, whether alternative forms of computation (analogue, neuromorphic, biological and so on) or rapidly developing methods in synthetic biology. For my money, we ought to be more worried about the accidental emergence of consciousness in cerebral organoids (brain-like structures typically grown from human embryonic stem cells) than in any new wave of LLM. But our worries don't stop there. When it comes to the impact of AI in society, it is essential to draw a distinction between AI systems that are actually conscious and those that persuasively seem to be conscious but are, in fact, not. While there is inevitable uncertainty about the former, conscious-seeming systems are much, much closer... Machines that seem conscious pose serious ethical issues distinct from those posed by actually conscious machines. For example, we might give AI systems "rights" that they don't actually need, since they would not actually be conscious, restricting our ability to control them for no good reason. More generally, either we decide to care about conscious-seeming AI, distorting our circles of moral concern, or we decide not to, and risk brutalizing our minds. As Immanuel Kant argued long ago in his lectures on ethics, treating conscious-seeming things as if they lack consciousness is a psychologically unhealthy place to be... One overlooked factor here is that even if we know, or believe, that an AI is not conscious, we still might be unable to resist feeling that it is. Illusions of artificial consciousness might be as impenetrable to our minds as some visual illusions... What's more, because there's no consensus over the necessary or sufficient conditions for consciousness, there aren't any definitive tests for deciding whether an AI is actually conscious.... Illusions of conscious AI are dangerous in their own distinctive ways, especially if we are constantly distracted and fascinated by the lure of truly sentient machines... If we conflate the richness of biological brains and human experience with the information-processing machinations of deepfake-boosted chatbots, or whatever the latest AI wizardry might be, we do our minds, brains and bodies a grave injustice. If we sell ourselves too cheaply to our machine creations, we overestimate them, and we underestimate ourselves... The sociologist Sherry Turkle once said that technology can make us forget what we know about life. It's about time we started to remember. Read more of this story at Slashdot.

  • EHT Astronomers Will Film Swirling of a Supermassive Black Hole for the First Time
    by EditorDavid on 19/01/2026 at 3:05 am

    "Astronomers are preparing to capture a movie of a supermassive black hole in action for the first time," reports the Guardian: The Event Horizon Telescope (EHT) will track the colossal black hole at the heart of the Messier 87 galaxy throughout March and April with the aim of capturing footage of the swirling disc that traces out the edge of the event horizon, the point beyond which no light or matter can escape... The EHT is a global network of 12 radio telescopes spanning locations from Antarctica to Spain and Korea, which in 2019 unveiled the first image of a black hole's shadow. During March and April, as the Earth rotates, M87's central black hole will come into view for different telescopes, allowing a complete image to be captured every three days... Measuring the black hole's spin speed matters because this could help discriminate between competing theories of how these objects reached such epic proportions. If black holes grow mostly through accretion — steadily snowballing material that strays nearby — they would be expected to end up spinning at incredibly high speeds. By contrast, if black holes expand mostly through merging with other black holes, each merger could slow things down. The observations could also help explain how black hole jets are formed, which are among the largest, most powerful structures produced by galaxies. Jets channel vast columns of gas out of galaxies, slowing down the formation of new stars and limiting galaxy growth. In turn this can create dense pockets of material that trigger bursts of star formation beyond the host galaxy... While the movie campaign will take place in the spring, the sheer volume of data produced by the telescopes means the scientists will need to wait for Antarctic summer before the hard drives can be physically shipped to Germany and the US for processing. So it is likely to be a lengthy wait before the rest of the world gets a glimpse of the black hole in action. In a correction, the Guardian apologizes for originally including an AI-generated illustration of black hole with a caption suggesting it was a photo from telescopes. They've since swapped in an actual picture of the Messier 87 galaxy black hole. Read more of this story at Slashdot.

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