# Coinbase Builds Quantum Custody

**Published:** 2026-07-23T18:15:35.826Z  
**Topic:** Coinbase  
**Sentiment:** neutral  
**Publisher:** TrendWatcher — https://www.trendwatcher.in/article/6b22af5f-3975-47fe-bfb4-fe8afebe84cf

Coinbase prepares for post-quantum future with $15 million funding, 7 million BTC at risk from quantum attacks, and a new Bitcoin Security Consortium to

Coinbase is building a post-quantum custody system to protect its users' assets from potential quantum computer attacks, with a threat level that could affect approximately 7 million BTC, or about one-third of the total supply [3]. The company is taking proactive measures to address the risk, as a sufficiently powerful quantum computer could theoretically break Bitcoin's current cryptography, exposing funds.

| At a glance | |
|---|---|
| Price | Not specified |
| 24h % move | Not specified |
| Key level | 7 million BTC at risk |
| Catalyst | Quantum computer threat |

## Preparing for a post-quantum world
The Bitcoin Security Consortium, founded by nine companies including Coinbase, BlackRock, and Fidelity Digital Assets, will provide $15 million in funding over three years to support Bitcoin security research, including post-quantum cryptography [2]. This initiative aims to address the potential threat of quantum computers to Bitcoin's security, as experts warn that proactive measures are essential to safeguard the ecosystem before "cryptographically relevant" quantum systems emerge. The consortium will not push for specific changes to Bitcoin's code or speak on behalf of its decentralized developer community.

## The quantum threat and Bitcoin's vulnerability
According to Coinbase's independent Quantum Advisory Council, approximately 1.7 million BTC reside in older Pay-to-Public-Key (P2PK) addresses, where public keys have been openly visible since the network's early days [3]. When combined with address reuse across other address types, the total quantum-vulnerable Bitcoin climbs to roughly 7 million. This exposure creates a dual challenge for the Bitcoin ecosystem: technical migration to post-quantum cryptography and difficult governance decisions about "abandoned" coins.

## What to watch
* The Bitcoin Security Consortium's progress in supporting post-quantum cryptography research and development
* The potential impact of quantum computer attacks on Bitcoin's security and price
* The implementation of post-quantum signing pipelines and threshold cryptography by Coinbase and other companies

The real significance of Coinbase's post-quantum custody system and the Bitcoin Security Consortium's funding initiative lies in their proactive approach to addressing the potential threat of quantum computers to Bitcoin's security. As the Bitcoin ecosystem continues to evolve, it is crucial to monitor the development of post-quantum cryptography and its potential impact on the cryptocurrency's price and security.

## Sources
1. Bitcoin Magazine — [Coinbase Builds Post-Quantum Custody System, Funds Bitcoin’s Crypto Upgrade](https://bitcoinmagazine.com/news/coinbase-building-post-quantum-solutions)
2. Decrypt — [BlackRock, Coinbase and Strategy Pledge $15M to Quantum-Proof Bitcoin](https://decrypt.co/374145/blackrock-coinbase-strategy-15m-quantum-proof-bitcoin)
3. Crowdfund Insider — [Coinbase Quantum Computing Threat Report Highlights Significant Bitcoin Exposure Risks from Reusing Crypto Addresses](https://www.crowdfundinsider.com/2026/06/285478-coinbase-quantum-computing-threat-report-highlights-significant-bitcoin-exposure-risks-from-reusing-crypto-addresses/)

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Cite as: TrendWatcher, "Coinbase Builds Quantum Custody", https://www.trendwatcher.in/article/6b22af5f-3975-47fe-bfb4-fe8afebe84cf