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first_img Knowledge base application Notion reports less than 1% workspace AI conversation leaks

The knowledge management application Notion has released an announcement acknowledging that some users' AI chat records have been leaked. The company stated that the affected workspaces account for less than 1% of all workspaces and is currently notifying the affected users. If users have provided their account, password, or credentials to the AI, Notion recommends treating them as compromised, immediately checking the login records of the relevant accounts, and changing passwords or credentials.The source of this incident is a hacker attack on the service provider Fireworks. Notion uses Fireworks AI to process data for a feature called Insights, which helps workspace administrators understand how team members are using AI. To generate this analytical data, Notion sends the saved AI conversation content to Fireworks for processing. Fireworks has also served as the inference service provider for some open-weight models in Notion's products.Notion stated that the potentially leaked data mainly consists of user chat records, including the chat content input by users and the replies given by the AI. The announcement explained that some users may have sent their account, password, or various credentials to the model while using AI. Notion advises the relevant users to immediately change these passwords or credentials and check for any unusual activity in their account login records.

Renaissance Technologies, the hedge fund, accurately sold off 99.7% of its Nvidia shares before the Huang Renxun scandal broke out

The latest 13F filing for the third quarter of 2026 submitted by the quantitative hedge fund Renaissance Technologies, founded by mathematician Jim Simons, shows that the institution has significantly adjusted its U.S. stock holdings, nearly completely liquidating its positions in Nvidia, Meta, Apple, and Amazon, with Nvidia's holdings decreasing by 99.7% from a previous market value of approximately $1.42 billion. This reduction occurred weeks before the controversy involving Jensen Huang was exposed.From the perspective of the top ten holdings, Micron Technology ranks first with $1.62 billion, Advanced Micro Devices ranks second with $1.21 billion, followed by United Therapeutics at $908 million, Intel at $835 million, Google's parent company Alphabet at $828 million, and UnitedHealth at $817 million. Additionally, it has established a new position in SpaceX, with a holding value of approximately $621 million.In terms of specific adjustments, the institution has significantly increased its holdings in SanDisk, with the number of shares increasing by 5451%; Micron Technology and UnitedHealth saw their share counts increase by 619% and 507%, respectively, while AMD increased by 140%. Aside from Nvidia, the share counts for Meta, Apple, and Amazon were reduced by 99.9%, 99.8%, and 99.5%, respectively, and it reduced its position in Palantir by 71%. The institution also completely exited its positions in Blackstone, the S&P 500 ETF, Mellanox Technologies, and Danaher, among others.

Grayscale: The various sectors of cryptocurrency are gradually decoupling from Bitcoin's trend, with volatility generally higher than that of Bitcoin

According to a report by Crypto Briefing, Grayscale's research indicates that the correlation between crypto assets and Bitcoin is decreasing, with Bitcoin currently explaining only about 50% of the return volatility across various crypto sectors.The report breaks down the annualized volatility and the impact of Bitcoin-related factors by sector: the annualized volatility of the currency sector is 49%, with 43% attributed to Bitcoin; the annualized volatility of the smart contract platform sector is 58%, with 38% attributed to Bitcoin; the annualized volatility of the finance sector is 59%, with 30% attributed to Bitcoin; the annualized volatility of the utilities and services sector is 67%, with 30% attributed to Bitcoin; the annualized volatility of the consumer and culture sector is 76%, with 46% attributed to Bitcoin; the artificial intelligence sector has the highest annualized volatility at 85%, with only 35% attributed to Bitcoin.The research points out that Bitcoin's own annualized volatility has recently been around 43%, while the volatility of all sectors tracked by Grayscale is higher than that of Bitcoin. The report suggests that lower correlation does not imply lower risk, but the fact that Bitcoin explains only half of the return volatility means that the other half is driven by factors specific to each sector, providing investors with a reference for assessing which sectors can offer true diversification.

first_img U.S. Department of Justice: North Korean hackers use deepfake video calls to steal over $400 million in cryptocurrency assets

The U.S. Department of Justice stated on Thursday that North Korean hackers have stolen over $400 million in cryptocurrency assets through a social engineering scheme based on secretly recorded videos and AI deepfakes over the past 18 months, and announced that it has seized the infrastructure supporting this operation. The FBI refers to this method as "FaceStealer," which centers on turning video conference calls into traps: hackers lure targets into meetings using previously stolen accounts from victims, then play pre-recorded footage of trusted contacts to simulate their presence, thereby gaining the target's trust.The group also uses AI to generate deepfake videos of well-known figures in the cryptocurrency and related industries, making the scams more convincing. Once the target lowers their guard, the attackers create false technical issues, such as claiming the other party cannot hear them, and provide a so-called "fix" link that is actually used to implant malware. Afterward, hackers can empty the victim's wallet or exploit their system permissions, sometimes lying in wait for months or even over a year before taking action. The FBI stated that it has seized over 900 segments of camera footage from FaceStealer victims based on federal search warrants.The Department of Justice linked this operation to North Korean-related groups such as Sapphire Sleet, BlueNoroff, and APT38, warning that these hackers are increasingly targeting open-source software developers, seemingly paving the way for supply chain attacks. On the same day, the Department of Justice also reported progress in the Binance theft case, stating that it has obtained court authorization to seize or restrict over $1.2 billion of the approximately $6.4 billion in stolen assets, which is part of the over $2.7 billion that has already been frozen. The FBI attributes this theft to the North Korean group TraderTraitor and claims it is laundering money at a rate of creating a new wallet approximately every 25 seconds. North Korea denies involvement, stating that the FBI's conclusions are a political provocation.
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