Microsoft is killing off an obsolete and vulnerable encryption cipher that Windows has supported by default for 26 years following more than a decade of devastating hacks that exploited it and recently faced blistering criticism from a prominent US senator. When the software maker rolled out Active Directory in 2000, it made RC4 a sole means of securing the Windows component, which administrators use to configure and provision fellow administrator and user accounts inside large organizations. RC4, short for Rivist Cipher 4, is a nod to mathematician and cryptographer Ron Rivest of RSA Security, who developed the stream cipher in 1987. Within days of the trade-secret-protected algorithm being leaked in 1994, a researcher demonstrated a cryptographic attack that significantly weakened the security it had been believed to provide. Despite the known susceptibility, RC4 remained a staple in encryption protocols, including SSL and its successor TLS, until about a decade ago. […]

Last week, Microsoft said it was finally deprecating RC4 and cited its susceptibility to Kerberoasting, the form of attack, known since 2014, that was the root cause of the initial intrusion into Ascension’s network. “By mid-2026, we will be updating domain controller defaults for the Kerberos Key Distribution Center (KDC) on Windows Server 2008 and later to only allow AES-SHA1 encryption,” Matthew Palko, a Microsoft principal program manager, wrote. “RC4 will be disabled by default and only used if a domain administrator explicitly configures an account or the KDC to use it.” […] Following next year’s change, RC4 authentication will no longer function unless administrators perform the extra work to allow it. In the meantime, Palko said, it’s crucial that admins identify any systems inside their networks that rely on the cipher. Despite the known vulnerabilities, RC4 remains the sole means of some third-party legacy systems for authenticating to Windows networks. These systems can often go overlooked in networks even though they are required for crucial functions.

To streamline the identification of such systems, Microsoft is making several tools available. One is an update to KDC logs that will track both requests and responses that systems make using RC4 when performing requests through Kerberos. Kerberos is an industry-wide authentication protocol for verifying the identities of users and services over a non-secure network. It’s the sole means for mutual authentication to Active Directory, which hackers attacking Windows networks widely consider a Holy Grail because of the control they gain once it has been compromised. Microsoft is also introducing new PowerShell scripts to sift through security event logs to more easily pinpoint problematic RC4 usage. Microsoft said it has steadily worked over the past decade to deprecate RC4, but that the task wasn’t easy.

As part of its bankruptcy, Luminar is seeking permission to sell both its lidar and semiconductor businesses, the latter of which it has already agreed to sell to Quantum Computing for $110 million. The company plans to continue to operate during the bankruptcy proceedings “to minimize disruptions and maintain delivery of its LiDAR hardware and software.” That said, Luminar will cease to exist once the process is complete. “As we navigate this process, our top priority is to continue delivering the same quality, reliability and service our customers have come to expect from us,” CEO Paul Ricci said in a statement.

After launching in 2017, Luminar muscled its way to the front of the autonomous vehicle industry as a top maker of lidar systems, a key technology that driverless cars use to sense the shapes and distances of objects around them. Luminar has sold sensors to Mercedes-Benz, Volvo, Audi, Toyota Research Institute, Caterpillar, and even Tesla, which has dismissed lidar sensors in favor of traditional cameras. The company was valued at nearly $3 billion when it went public through a reverse merger with a SPAC in 2020.

On google.com, the Search bar now has a plus icon at the far left that replaces the magnifying glass. Clicking lets you “Upload image” or “Upload file.” It very much matches the AI Mode experience. Those two capabilities aren’t new, but this plus menu does help emphasize that you can use Google to accomplish tasks, and not just find information. Additionally, it helps indicate that they can be used with AI Mode and AI Overviews. This is just available on desktop web (not mobile) and is live on all the devices we checked today, including across signed-out Incognito sessions.

React maintainers disclosed the critical bug on December 3, and exploitation began almost immediately. According to Amazon’s threat intel team, Chinese government crews, including Earth Lamia and Jackpot Panda, started battering the security hole within hours of its disclosure. Palo Alto Networks’ Unit 42 responders have put the victim count at more than 50 organizations across multiple sectors, with attackers from North Korea also abusing the flaw.

Google, in a late Friday report, said at least five other suspected PRC spy groups also exploited React2Shell, along with criminals who deployed XMRig for illicit cryptocurrency mining, and “Iran-nexus actors,” although the report doesn’t provide any additional details about who the Iran-linked groups are and what they are doing after exploitation. “GTIG has also observed numerous discussions regarding CVE-2025-55182 in underground forums, including threads in which threat actors have shared links to scanning tools, proof-of-concept (PoC) code, and their experiences using these tools,” the researchers wrote.

JPMorgan Chase is joining the list of traditional financial firms seeking to bring blockchain technology to an investing staple: the money-market fund. The banking giant’s $4 trillion asset-management arm is rolling out its first tokenized money-market fund on the Ethereum blockchain. JPMorgan will seed the fund with $100 million of its own capital, and then open it to outside investors on Tuesday. Called My OnChain Net Yield Fund, or “MONY,” the private fund is supported by JPMorgan’s tokenization platform, Kinexys Digital Assets, and will be open to qualified investors, or individuals with at least $5 million in investments and institutions with a minimum of $25 million. The fund has a $1 million investment minimum.

Wall Street has waded deeper into tokenization since the passage of the Genius Act earlier this year. The landmark measure, which establishes a regulatory framework for tokenized dollars known as stablecoins, has unleashed a wave of efforts to tokenize everything from stocks and bonds to funds and real assets. “There is a massive amount of interest from clients around tokenization,” said John Donohue, head of global liquidity at J.P. Morgan Asset Management. “And we expect to be a leader in this space and work with clients to make sure that we have a product lineup that allows them to have the choices that we have in traditional money-market funds on blockchain.”

“Slop” was first used in the 1700s to mean soft mud, but it evolved more generally to mean something of little value. The definition has since expanded to mean “digital content of low quality that is produced usually in quantity by means of artificial intelligence.” In other words, “you know, absurd videos, weird advertising images, cheesy propaganda, fake news that looks real, junky AI-written digital books,” Barlow said.

Ford’s announcements today can’t be said to have come out of the blue. Rumors of the F-150’s demise have been circulating for more than a month, and last week SK On ended its joint venture with Ford that was building a pair of EV battery plants in Kentucky and Tennessee. We learned then that Ford would keep the Kentucky plant and SK On gets the one in Tennessee, which would focus on the energy storage business instead. Now, we know that something similar will happen at the Kentucky plant — Ford says it’s spending $2 billion to convert the factory to make prismatic lithium iron phosphate (LFP) cells.

Those aren’t destined for EVs, but they are the preferred cell format for data centers, Ford says. The company says that it will bring the factory online in the next 18 months, reaching an annual output of 20 GWh. Other Ford plants are also being repurposed. With no full-size BEV pickup in the product plans, the assembly plant in Tennessee that was to produce it — the one near the battery factory that SK On is keeping — will instead build new gas-powered trucks, although not for another four years. Around that same time, its Ohio assembly plant will begin building new commercial vehicles.

All of this will impact Ford’s bottom line, to the tune of $19.5 billion over the next few years, $5.5 billion of which will be in cash. Most of that will hit in the final quarter of 2025, but will extend until 2027, Ford said.

Several dozen people protested on Sunday in the Siberian city of Tomsk against Russia’s ban on U.S. children’s gaming platform Roblox, a rare show of public dissent as popular irritation over the ban gains some momentum. In wartime Russia, censorship is extensive: Moscow blocks or restricts social media platforms such as Snapchat, Facebook, Instagram, WhatsApp and YouTube while distributing its own narrative through a network of social media and Russian media. Russia’s communications watchdog Roskomnadzor said on December 3 it had blocked Roblox because it was “rife with inappropriate content that can negatively impact the spiritual and moral development of children.”

In Tomsk, 2,900 km (1,800 miles) east of Moscow, several dozen people braved the snow to hold up hand-drawn placards reading “Hands off Roblox” and “Roblox is the victim of the digital Iron Curtain” in Vladimir Vysotsky Park, according to photographs provided by an organizer of the protest. “Bans and blocks are all you are able to do,” read one placard. The photographs showed about 25 people standing in a circle in the snow, holding up placards. In Russia, the ban on Roblox has triggered a debate over censorship, child safety in relation to technology and even the effectiveness of censorship in a digitalized world where children can bypass many bans in a few clicks.

In a support page, Google announced the discontinuation of the “dark web report” tool, two years after offering it as a free perk to Gmail users before expanding it more broadly. The feature worked by scanning for your email addresses to determine whether they had appeared in data breaches, which often circulate on Dark Web marketplaces. The tool could then alert you about where the data was exposed, including any accompanying details such as dates of birth, addresses, and phone numbers.