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sign

Sign usually refers to digital signature technology in the fields of blockchain and cryptocurrency. A digital signature is a cryptographic technique used to verify the authenticity and integrity of digital information. It encrypts and decrypts data using public and private keys, ensuring that only users holding the private key can generate a valid signature, thereby providing authentication and data integrity assurance. Digital signatures play a key role in smart contracts, transaction verification, and identity authentication.
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Anthropic researcher resigns, stating that AI may go out of control next year

Anthropic researcher Jacob Coxon announced his resignation and is preparing to leave the AI industry. He has conducted pre-training research at OpenAI and Anthropic over the past three years. He pointed out that neither company has responsibly advanced AI and are competing to create superintelligence that can continue to enhance its own capabilities, "betting our lives on it."He switched from OpenAI to Anthropic this year because the latter places more emphasis on model safety. Coxon acknowledged that Anthropic's safety work is serious, but believes that as long as companies are racing to be the first to create AGI (artificial general intelligence that surpasses humans in a wide range of tasks), safety compromises are unavoidable, and self-discipline from a single company cannot solve the problem. His assessment of the two companies is: many people inside OpenAI still do not truly realize how great this risk is; Anthropic knows the risks but believes others are unreliable, so they must create it themselves first.Coxon stated that some AI practitioners are much more pessimistic privately than they express publicly, and are even worried that AI could destroy humanity before the end of this decade. He personally judges that in the most radical scenario, AI could go out of control by the end of next year, so such decisions should not be made solely by the engineers of a few companies.

first_img Hacken Report: Half of USDT is controlled by only two signing keys

Blockchain security company Hacken released an assessment report indicating that approximately half of the circulating USDT (about $91.3 billion on the Tron network) is controlled by a 2-of-3 multi-signature contract, which lacks built-in delays, cancellation processes, or reliable revocation mechanisms. Attackers only need to compromise two signature keys to change contract ownership, mint tokens, freeze addresses, clear frozen balances, or set transfer fees without accessing any user wallets. Hacken also discovered that Tether reuses the same set of six signature keys across three chains: Ethereum, Avalanche, and Celo, posing a risk of cross-chain spread.Meanwhile, stablecoin rating agency Bluechip upgraded Tether's company rating from D to C, citing that KPMG's audit showed Tether's reserves exceeded liabilities by $6.8 billion as of December 31, 2025. This is the first time Bluechip has adopted the expanded SMIDGE methodology, which incorporates Hacken's technical risk analysis. However, Hacken only gave USDT a cybersecurity score of 3.3 out of 10 and pointed out that the USDT smart contract does not have automatic reserve proof checks or a token minting cap. Once signers authorize a transaction, the contract can mint an unlimited number of tokens without a bank reserve proof.Hacken stated that it has not yet completed an equivalent assessment of Circle's USDC, and Bluechip's previous B+ rating for USDC was based on an old methodology, which cannot be directly used for technical comparison.

Anthropic signed at least 14.8GW of computing power in the past 11 months, with a potential cost of up to 517 billion USD

According to statistics from The Information, Anthropic has signed at least 14.8GW of computing power in the past 11 months, which can be gradually utilized in the coming years. Based on currently public contracts, the potential total cost could reach up to $517 billion, with most expenditures occurring over the next decade. In addition to the 1-2GW already secured before October last year, the total computing power signed by Anthropic is approximately 16GW.This round of expansion is primarily driven by the demand for Claude. This year, the growth of Claude Code and Cowork has exceeded Anthropic's expectations, prompting the company to focus on acquiring computing power. The new agreement with Amazon provides up to 5GW, while Google and Broadcom offer another 5GW, and Microsoft and NVIDIA provide approximately 1GW. Anthropic has also rented all computing power from SpaceX's Colossus 1, acquiring over 220,000 NVIDIA GPUs, including H100, H200, and GB200.Anthropic has secured about 16GW, with many contracts extending beyond 2030. OpenAI has set a target for investors to reach 30GW by 2030, expecting to invest approximately $750 billion in computing power by that year. The $517 billion figure is the potential maximum cost estimated by The Information based on existing cloud services, chip, and data center contracts, with some computing power potentially being delayed or unused, and some contracts allowing for early cancellation.
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