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Jinse Finance reported that the total amount of sovereign debt issued by the U.S. Treasury has surpassed $30 trillion for the first time, more than doubling since 2018. Data released on Thursday showed that as of November, the total amount of outstanding Treasury bills, notes, and bonds reached $30.2 trillion. This $30.2 trillion in debt constitutes the main component of the total U.S. federal debt. As of November, the total U.S. national debt reached $38.4 trillion, which includes obligations to the Social Security Trust Fund, savings bond holders, and others. According to data from the Securities Industry and Financial Markets Association, in 2020, the U.S. raised $4.3 trillion through the issuance of these three types of Treasury securities, with the fiscal deficit exceeding $3 trillion that year. Although the deficit has since narrowed (dropping to about $1.78 trillion in fiscal year 2025), interest payments on the debt alone have reached as high as $1.2 trillion. Jason Williams, a rates strategist at Citigroup, pointed out: "The biggest challenge is interest payments. Even if tariff revenues reach $300-400 billion, it is still far less than what we pay in interest on existing debt. We are like being stuck in quicksand; tariffs may slow our sinking a bit, but we are still sinking."

BlockBeats News, December 4, according to The Block, Ledger stated that a vulnerability was recently discovered in a widely used Android smartphone processor chip. Users of software-based Web3 wallets relying on such devices are at risk if their device is physically accessed by an attacker. The Donjon team found that hardware fault injection can bypass core security checks and thus control the chip. Although this discovery does not affect Ledger hardware wallets, it highlights the dangers of relying solely on smartphone hot wallets to secure digital assets. The team tested the MediaTek Dimensity 7300 chip produced by TSMC, aiming to determine whether electromagnetic fault injection could compromise the earliest stage of the boot process. They used open-source tools to inject timely electromagnetic pulses into the chip’s boot ROM, obtaining its runtime information and thus identifying attack paths. Subsequently, the team bypassed the filtering mechanism in the chip’s write command and overwrote the return address on the boot ROM stack, allowing them to execute arbitrary code at EL3 (the processor’s highest privilege level). This attack can be repeated within minutes. Ledger stated that even the most advanced smartphone chips are vulnerable to physical attacks and are not suitable environments for protecting private keys, reiterating that secure elements are crucial for the self-custody of digital assets. The vulnerability was reported to MediaTek in May, and the vendor has notified affected manufacturers.