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custody

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first_img Coinbase plans post-quantum Bitcoin custody, compatible with various signature schemes

Coinbase Chief Cryptographer Yehuda Lindell stated on the MARA Foundation TV program that the exchange is designing a custody system capable of adapting to any post-quantum signature scheme that Bitcoin may adopt in the future. It is currently unclear which post-quantum signature scheme Bitcoin will use in practical applications. Lindell believes it is unlikely that a single signature scheme will be universally adopted, so preparations must be made for different outcomes across various blockchains.Coinbase is custodian for approximately $250 billion in assets for institutions such as BlackRock. Traditional Multi-Party Computation (MPC) relies on key sharding, but many post-quantum signature schemes may be "not friendly to MPC"; for example, hash-based signatures lack the arithmetic structure required for traditional cryptographic key splitting. Although cryptographers like Dan Boneh are researching relevant solutions, this research is still in a highly experimental phase, and it remains uncertain whether a viable MPC-like solution for hash signatures can be developed.To this end, Coinbase is exploring a backup architecture centered around programmable Hardware Security Modules (HSM), where private keys will be encrypted with post-quantum cryptography and assembled only within physically secure HSMs. Lindell stated that while the completion timeline is uncertain, once finished, "I will be able to say, I can support any scheme," without worrying about a blockchain adopting a signature scheme that it cannot support.

first_img Chief Legal Advisor of the U.S. SEC's Cryptocurrency Working Group Elaborates on the Path for Cryptocurrency Custody Rules

According to CoinDesk, Taylor Lindman, the Chief Legal Counsel of the U.S. Securities and Exchange Commission (SEC) Crypto Working Group, stated at the CoinDesk Policy & Regulation event held in Washington that the SEC is advancing rules for the custody of crypto assets. The relevant proposal has been submitted to the Office of Management and Budget (OMB) for review, covering investment companies and broker-dealers. She indicated that the rule aims to inform the market about how to hold non-securities crypto assets within broker-dealers without special registration and clarifies that investment advisors can store client assets in institutions such as state-chartered trusts.Once the proposal passes the review by the Office of Management and Budget, the SEC will formally present it and seek feedback from the industry and the public. Lindman also mentioned that the SEC will issue an employee statement in December 2025 as a transitional arrangement, guiding broker-dealers on handling crypto custody matters before the rules are implemented, and will allow investment advisors to store client assets in state-chartered trusts as qualified crypto custodians starting in September 2025.Lindman described the SEC's recent work as "laying the groundwork," including previously proposed rules allowing crypto issuance and exemptions for tokenized securities. She stated that the SEC is working to ensure that existing securities intermediaries and market participants can confidently use blockchain to hold and trade crypto assets. Previously, the SEC's attempts at custody rules under Gary Gensler in 2023 were abandoned, and a leadership supportive of crypto was appointed after the Trump administration took office.

first_img Zodia Custody CEO Julian Sawyer stepped down and transitioned to a strategic advisor

Institutional digital asset custodian Zodia Custody's CEO Julian Sawyer announced his resignation and will take on the role of strategic advisor. In a memo sent to employees on September 10, Sawyer stated that Standard Chartered Bank's acquisition of Zodia Custody's custody business and the establishment of Zodia Solutions provided an appropriate time for him to hand over daily leadership responsibilities, and he will continue to be closely involved in company affairs.According to the memo, Zodia Custody's Chief Revenue Officer Richard Clark will lead the company’s transition to Standard Chartered Bank and will be responsible for the custody business; current executives Craig Perrin and Anoosh Arevshatian will be responsible for the establishment of Zodia Solutions. A spokesperson for Zodia Custody confirmed this personnel change. Zodia Custody is an institutional-grade digital asset custodian based in London, supported by Standard Chartered Bank and other banks, providing regulated asset custody, wallet infrastructure, staking, and over-the-counter settlement services for financial institutions, asset management companies, and others.This arrangement differs from previous plans. In May of this year, SC Ventures announced that Sawyer would serve as CEO of Zodia Solutions after the acquisition was completed. Standard Chartered Bank stated in May that Zodia's shareholders and noteholders had accepted its non-binding acquisition offer, and the custody business would be integrated into the bank's financing and securities services division, while the infrastructure platform would be spun off into Zodia Solutions, which is under SC Ventures.

first_img Block applies to establish the National Trust Bank, Builders Bank, to custody Bitcoin and stablecoins

Jack Dorsey's payment company Block has applied to establish Builders Bank & Trust, N.A. If approved, the bank will become an uninsured national trust bank directly regulated by the Office of the Comptroller of the Currency (OCC), focusing on providing custody and trust services for Bitcoin and stablecoins, without accepting deposits or issuing loans.The application is still pending OCC approval, and the OCC's public list of digital asset license applications currently includes 11 pending applications (submitted between February 23 and August 19), which does not yet include Builders Bank. Previously, the OCC conditionally approved five national trust applications in December 2025, including Circle's First National Digital Currency Bank and Ripple, as well as conversion applications from BitGo, Fidelity Digital Assets, and Paxos; Circle received final approval in July of this year.The Bank Policy Institute (BPI), representing large banks, had previously opposed a series of limited-purpose national trust license applications, arguing that companies should not obtain trust licenses unless they plan to operate a true trust company, and warned against using the license as a lightly regulated pathway for bank-like products. Block stated that Builders Bank will not begin operations until it receives the necessary regulatory approvals.
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