In this section, we provide an overview of blockchain technology and cryptocurrency, laying the groundwork for understanding the subsequent discussions in this paper. Blockchain technology has gained growing attention recently for its strong security features and decentralized structure. It is characterized by a sequence of cryptographically secured blocks that operate on a network of nodes [42]. This design ensures data immutability and verifiability while allowing universal access, enabling participants to interact with the ledger from anywhere at any time. Once recorded on the ledger, transactions become irreversible and are executed securely and transparently, which helps safeguard the integrity of data exchanges. With the support of blockchain technology, cryptocurrencies have surged in popularity as an innovative means of conducting secure digital transactions. Unlike traditional currencies, cryptocurrencies operate without a centralized authority and are managed through decentralized systems. This decentralization maintains participant anonymity, offering robust privacy protection; however, it complicates efforts to identify fraudulent activities within the market.

Machine learning applied to blockchain graphs offers significant opportunities for enhanced data analysis and applications. However, the potential of this field is constrained by the lack of a large-scale, cross-chain dataset that includes hierarchical graph-level data. To address this issue, we present novel datasets that provide detailed label information at the token level and integrate interactions between tokens across multiple blockchain platforms.

Artificial intelligence systems could account for nearly half of datacentre power consumption by the end of this year, analysis has revealed. The estimates by Alex de Vries-Gao, the founder of the Digiconomist tech sustainability website, came as the International Energy Agency forecast that AI would require almost as much energy by the end of this decade as Japan uses today. De Vries-Gao's calculations, to be published in the sustainable energy journal Joule, are based on the power consumed by chips made by Nvidia and Advanced Micro Devices that are used to train and operate AI models. The paper also takes into account the energy consumption of chips used by other companies, such as Broadcom. The IEA estimates that all data centres – excluding mining for cryptocurrencies – consumed 415 terawatt hours (TWh) of electricity last year.

Sometimes it helps me to write by thinking about how a radio broadcaster or television presenter would deliver the information, so I'm your host, Blake Montgomery. Today in tech news: questions hover over the automation of labor in the worker-strapped US healthcare system; and drones proliferate in a new conflict: India v Pakistan, both armed with nuclear weapons. Meanwhile, in contrast to a thoughtful and robust conversation, the US is taking the opposite tack. Legend has it that Alexander the Great was presented with a knot in a rope tying a cart to a stake. So complex were its twistings that no man had been able to untie it of the hundreds who had tried. Alexander silently drew his sword and sliced the knot in two.

Treasury Secretary Scott Bessent responds to economic uncertainty, breaking down President Donald Trump's fiscal and cryptocurrency goals on'My View with Lara Trump.' FIRST ON FOX: One of the major players in the crypto and artificial intelligence (AI) industries attempting to cozy up to the Trump administration is a longtime Democratic operative and donor who has backed anti-Trump efforts and candidates while working for companies stacked with Democratic activists. Chris Lehane, a veteran political strategist dating back to the Clinton administration, has donated over 150,000 to Democrats, FEC records show, and many of those Democrats have been outspoken Trump critics for several years. Lehane has been a major backer of Democratic Sen. Mark Warner, who voted to convict Trump during his impeachment trial in 2021 and against several of Trump's Cabinet nominees. He also hosted a San Francisco fundraiser for the Virginia senator, along with Open AI's Sam Altman, in March. Warner has been a key figure in the resistance to the Trump administration, including being a vocal critic of the Trump administration's "sloppy" Signal chat controversy and pushing back on the administration's DOGE push against waste, fraud and abuse in government.

AI has transformed everyday tasks such as writing, coding -- even shopping. Now, Visa is introducing an initiative to prepare its payment network for a new era of agentic AI shopping experiences. Earlier this week, the company unveiled Visa Intelligent Commerce at the Visa Global Product Drop. According to the release, this initiative opens Visa's payment network to developers and engineers who are building agentic AI shopping experiences that find and buy products for users. Also: Google's AI Mode may be the upgrade Search desperately needs - how to try it for free Moreover, Visa Intelligent Commerce is a commercial partner program for AI platforms that includes a suite of integrated APIs developers can use to deploy Visa's AI commerce capabilities.

Have you ever wanted a mobile device designed solely to scan your eyeballs? No, that sounds a little creepy? Tools for Humanity, a start-up backed by OpenAI CEO Sam Altman, debuted the Orb Mini this week, a smartphone-sized device with two massive eye sensors on it. The hardware is part of the World project and app, a grand plan aimed at creating a global identification system. The idea is that these sensors, paired with a blockchain registry, could serve as a tool for verifying someone's humanity.

Sam Altman's iris-scanning, identify-verification technology startup says it will begin expanding to the US starting May 1 and will launch a phone-like hardware device by next year. Those changes--and a promised World-branded debit card--signal the company's ambitions to develop a "super app"--a goal shared by Elon Musk. Altman and Alex Blania, a German physics researcher, announced at an event in San Francisco Wednesday evening that their venture-backed company, Tools for Humanity, is updating its "World" products to include a new, smaller, eye-scanning orb. The device-and-app combo scans people's irises, creates a unique user ID, stores that information on the blockchain, and uses it as a form of identity verification. If enough people adopt the app globally, the thinking goes, it could ostensibly thwart scammers.