The Securities and Exchange Commission publishes crypto custody guide

cointelegraphPublicado a 2025-12-13Actualizado a 2025-12-13

Resumen

The U.S. Securities and Exchange Commission (SEC) has published a crypto custody guide outlining best practices and risks for storing digital assets. The bulletin compares self-custody with third-party custody, warning investors to understand policies like asset rehypothecation and commingling. It also details the pros and cons of hot wallets (internet-connected, vulnerable to hacking) and cold wallets (offline, but riskier if keys are lost). The move signals a shift from the SEC’s previously hostile stance under former Chair Gary Gensler. The crypto community welcomed the guide as a transformative step, with some noting the agency is now educating rather than opposing the industry. This follows recent SEC approval for DTCC to begin tokenizing traditional financial assets.

The United States Securities and Exchange Commission (SEC) published a crypto wallet and custody guide investor bulletin on Friday, outlining best practices and common risks of different forms of crypto storage for the investing public.

The SEC’s bulletin lists the benefits and risks of different methods of crypto custody, including self-custody versus allowing a third-party to hold digital assets on behalf of the investor.

If investors choose third-party custody, they should understand the custodian's policies, including whether it “rehypothecates” the assets held in custody by lending them out or if the service provider is commingling client assets in a single pool instead of holding the crypto in segregated customer accounts.

The Bitcoin supply broken down by the type of custodial arrangement. Source: River

Crypto wallet types were also outlined in the SEC guide, which broke down the pros and cons of hot wallets, which are connected to the internet, and offline storage in cold wallets.

Hot wallets carry the risk of hacking and other cybersecurity threats, according to the SEC, while cold wallets carry the risk of permanent loss if the offline storage fails, a storage device is stolen, or the private keys are compromised.

The SEC’s crypto custody guide highlights the sweeping regulatory change at the agency, which was hostile to digital assets and the crypto industry under former SEC Chairman Gary Gensler’s leadership.

Related: SEC sends warning letters to ETF issuers targeting untamed leverage

The crypto community celebrates the SEC guide as a transformational change in the agency

“The same agency that spent years trying to kill the industry is now teaching people how to use it,” Truth For the Commoner (TFTC) said in response to the SEC’s crypto custody guide.

The SEC is providing “huge value” to crypto investors by educating prospective crypto holders about custody and best practices, according to Jake Claver, the CEO of Digital Ascension Group, a company that provides services to family offices.

Source: Paul Atkins

SEC regulators published the guide one day after SEC Chair Paul Atkins said that the legacy financial system is moving onchain.

On Thursday, the SEC gave the green light to the Depository Trust and Clearing Corporation (DTCC), a clearing and settlement company, to begin tokenizing financial assets, including equities, exchange-traded funds (ETFs) and government debt securities.

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Lecturas Relacionadas

Bitcoin Withdrawals Continue: 8 Years of Storage in a Coldcard Cold Wallet Ended in Zero

Coldcard Hardware Wallet Hacked: Losses Mount Due to Vulnerable Seed Generation A critical vulnerability in Coldcard hardware wallets has led to a continued wave of fund thefts. According to Galaxy Research, the total stolen has reached 1,367.05 BTC (approx. $88.6 million) from 4,585 addresses, a significant increase from the initial 594.5 BTC reported on July 30, 2026. Most of the stolen funds remain on the attackers' addresses. The issue is not with the current firmware, which Coinkite has updated, but with seed phrases generated on vulnerable devices between March 2021 and the release of fixed firmware versions. Due to a programmer error, devices switched from using a hardware random number generator to the software-based Yasmarang generator, which was initialized with publicly accessible data like the chip's serial number. This made the seed phrases predictable through offline brute-force attacks, meaning wallets remain at risk until funds are moved to a new wallet generated with the patched firmware. Affected devices include Mk2/Mk3 with firmware 4.0.1–4.1.9 (and up to 5.0.3), Mk4/Mk5 up to version 5.6.0, and Q models up to 1.5.0Q. The only exceptions are seeds created with a high-entropy method like at least 50 independent dice rolls or a strong unique BIP-39 passphrase. All other owners must generate a new seed on the fixed firmware and transfer their assets. A case highlighting the human impact involves a 39-year-old long-term investor who lost 2 BTC (approx. $130,000) in minutes. He had accumulated the Bitcoin over eight years through physical labor, viewing it as a financial lifeline and a retirement plan in a country suffering from hyperinflation. His story underscores that even conservative "buy and hold in cold storage" strategies can be compromised by such underlying technical flaws. From a technical perspective, this incident echoes historical failures where weak random number generators undermined cryptographic security, challenging the assumption that offline storage is automatically foolproof.

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