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Centralized and decentralized crypto exchanges differ in custody and process
Decentralized exchanges trade either against token pools via software or through peer-to-peer matching, while centralized platforms typically hold private keys on users' behalf.
For many crypto investors, ownership often starts with a centralized exchange, where a company manages the platform and matches buy and sell interest through an order book, similar to how stock trading brokers operate. Yahoo Finance describes these centralized exchanges as taking custody during the process, letting users deposit fiat such as U.S. dollars to purchase crypto and also deposit crypto for trading through an exchange-managed wallet.
Yahoo Finance explains that centralized exchanges can offer “quick trade” features, which execute orders with minimal steps but can involve paying a spread for that convenience. In contrast, decentralized exchanges operate without a company “go-between,” using software to manage trades against a pool of tokens or using peer-to-peer, or P2P, trading.
A central distinction is custody, defined as who controls a user’s crypto. With a centralized exchange, the operator manages the wallet and holds the private keys that control assets on a blockchain, leaving users with an IOU claim until they withdraw their holdings from the exchange.
The article also notes a trade-off: centralized exchanges aim to reduce complexity by handling wallet management, while that ease comes with the risk that another party holds the keys. The guide frames decentralized approaches as alternative ways to trade without that same operator-held custody model.