--- title: "What Is Crypto Custody? Custodians, Qualified Custodians and Who Holds the Keys" term: "Crypto custody" type: glossary_term canonical: https://www.moonwire.org/insights/glossary/crypto-custody.html --- # What Is Crypto Custody? Custodians, Qualified Custodians and Who Holds the Keys > Crypto custody is the business of holding digital assets on someone else's behalf, with the custodian controlling the private keys. The client holds a claim on the firm rather than direct control of the coins. **Crypto custody** is the service of holding digital assets for someone else. The custodian controls the **private keys** that can move the coins, and the client holds a contractual claim on the custodian. That is the mirror image of [self-custody](https://www.moonwire.org/insights/glossary/self-custody.md), where the owner holds the keys directly. ## What a custodian actually does - **Key generation and storage** — usually split across hardware security modules, offline "cold" storage and multi-party signing, so that no single person or machine can sign alone. - **Transaction approval** — policies governing who may authorise a withdrawal, to which addresses, and after what delay. - **Segregation and record-keeping** — tracking which client owns which balance, and keeping client assets apart from the firm's own. - **Layered services** — staking, lending and settlement built on top of the custody account itself. ## Qualified custodians and the regulatory layer "Qualified custodian" is a regulatory label rather than a marketing one. In several jurisdictions a regulated fund or adviser may place client assets only with a custodian licensed for the job — a trust company, a bank, or a firm holding a specific digital-asset charter. The label matters because it determines what happens in an insolvency and who supervises the firm's controls. Requirements differ by jurisdiction, so the same company can be a qualified custodian in one country and not in another. ## Why custody is not a synonym for safety A custodian removes the burden of key management and replaces it with counterparty risk. If the firm fails, is breached, or halts withdrawals, clients become creditors. Custody arrangements differ widely in whether assets are segregated, insured, or held on the firm's own balance sheet, and those differences tend to become visible only in a failure. ## In MoonWire analysis Institutional custody has been one of the steadiest threads in our coverage: banks and platforms adding staking to custody accounts, and settlement networks naming custodians among their founding participants — see our note on [Circle's Arc validators](/insights/circle-arc-founding-validators-blackrock-visa-dtcc.html) and the [crypto security hub](/insights/topics/crypto-security.html). A custody arrangement describes who bears which risk. It is never an assurance about either party. ## Further reading - [NYDFS: Guidance on Custodial Structures for Customer Protection](https://www.dfs.ny.gov/industry_guidance/industry_letters/il20230123_guidance_custodial_structures) - [Wikipedia: Cryptocurrency wallet](https://en.wikipedia.org/wiki/Cryptocurrency_wallet) ## Where this appears in MoonWire analysis - [The Senate Blocked the Clarity Act 49-50. The Venues Kept Building Anyway.](https://www.moonwire.org/insights/market-pulse-2026-09-17.md) — Sep 17, 2026 - [The DeFi Pitch This Week Was a Receipt. One of Them Was a Disclosure Form.](https://www.moonwire.org/insights/sector-rotation-2026-09-15.md) — Sep 15, 2026 - [Three Chains Prepped for Quantum Attacks. A Weak Random Number Broke First.](https://www.moonwire.org/insights/state-of-market-2026-08.md) — Sep 14, 2026 - [Tokenized Stocks vs Tokenized Equities vs RWAs: What Actually Shipped in 2026](https://www.moonwire.org/insights/tokenized-stocks-vs-tokenized-equities-vs-rwas.md) — Sep 12, 2026 - [Zcash's Bull Case Is Monetary. The Measured Print Said “Not Only ZEC”.](https://www.moonwire.org/insights/zcash-bull-case-monetary-not-only-zec.md) — Sep 8, 2026 - [The Monthly Close Was the Bullish Part. The Rest Came With Conditions.](https://www.moonwire.org/insights/market-pulse-2026-09-02.md) — Sep 2, 2026 - [Crypto Venues Listed Stock Products All Week. The SEC Scheduled a Roundtable.](https://www.moonwire.org/insights/week-in-review-2026-09-01.md) — Sep 1, 2026 - [Treasury Proposed Stablecoin Rules the Day MiCA Issued Its First Penalty](https://www.moonwire.org/insights/treasury-stablecoin-rules-first-mica-penalty.md) — Aug 17, 2026 - [Three Firms Counted Crypto's H1 Thefts and Got Three Different Answers](https://www.moonwire.org/insights/sector-rotation-2026-07-31.md) — Aug 15, 2026 - [ETF Flows Round-Tripped in July. The Institutions Came for the Rails.](https://www.moonwire.org/insights/state-of-market-2026-07.md) — Aug 15, 2026 - [Bitcoin's Breakaway Chain Has Mined the Same Two Blocks Since Saturday](https://www.moonwire.org/insights/market-pulse-2026-08-09.md) — Aug 9, 2026 - [Four Governments Acted on Crypto in One Day. Three of Them Aimed at the Venues.](https://www.moonwire.org/insights/crypto-rules-target-venues-russia-japan-nigeria.md) — Aug 7, 2026 --- *MoonWire surfaces and summarizes public crypto news.* **General information only — not financial advice.** MoonWire Ltd. is not licensed by ASIC and holds no AFSL. This content does not consider your objectives, financial situation, or needs, and is not a recommendation to buy, sell, or hold any asset. *This analysis is generated by artificial intelligence and may be inaccurate, incomplete, or fabricated. Independently verify before acting.* © 2026 MoonWire Ltd. · [Terms](https://www.moonwire.org/legal/TOS) · [Risk Disclosure](https://www.moonwire.org/legal/RISK_DISCLOSURE) · [Privacy Policy](https://www.moonwire.org/legal/PRIVACY_POLICY)