---
title: "Quantum Computers Threatens Crypto: Google Warns Bitcoin’s Encryption Could Break by 2029"
url: https://thecoingazette.com/quantum-computers-threatens-crypto-google-warns-bitcoins-encryption-could-break-by-2029/
date: 2026-04-01
modified: 2026-04-01
author: "Coin Gazette Editorial"
description: "Google’s Quantum AI division has issued a stark warning that quantum computers could break the cryptographic systems"
categories:
  - "blockchain"
  - "Security"
tags:
  - "Bitcoin"
  - "blockchain"
  - "ethereum"
  - "exploits"
  - "google"
  - "Quantum AI"
  - "research"
  - "security threats"
image: https://thecoingazette.com/wp-content/uploads/2026/04/Copilot_20260401_191238-1024x683.webp
word_count: 441
---

# Quantum Computers Threatens Crypto: Google Warns Bitcoin’s Encryption Could Break by 2029

Google’s Quantum AI division has issued a stark warning that quantum computers could break the cryptographic systems protecting [Bitcoin](https://thecoingazette.com/category/bitcoin/) and other cryptocurrencies by 2029, according to the [Times Now](https://www.msn.com/en-ca/money/news/bitcoin-at-risk-google-warns-quantum-computers-could-break-crypto-security-by-2029/ar-AA1ZULjm?ocid=winp2fptaskbar&cvid=69cd5da19a9d4fb19492775c07a16f03&ei=27). The research, co‑authored with experts from the Ethereum Foundation, Stanford University, and Coinbase, signals one of the most urgent security challenges the crypto ecosystem has ever faced.

# What Google’s Researchers Actually Found

Google’s paper states that **superconducting quantum computers**—the type Google is actively developing—may soon be powerful enough to crack the cryptographic keys that secure:

- Bitcoin wallets

- Ethereum accounts

- Blockchain transactions

- Cross‑chain bridges

- Smart contract signature schemes

Justin Drake of Ethereum Foundation emphasized that such a machine could **crack private keys in minutes**. This threat is not theoretical anymore. It’s a timeline.

# The 2029 Quantum Risk Window

Researchers estimate that **cryptographically relevant quantum computers** could exist **around 2029**. This gives the industry a **five‑year window** to migrate to quantum‑resistant systems.

Even before an actual attack, **fear or misinformation** about quantum threats could destabilize markets by undermining public confidence.

# Why Quantum Computers Break Today’s Crypto

Most blockchains rely on **Elliptic Curve Cryptography (ECC)** and **RSA**. These are secure against classical computers but vulnerable to **Shor’s algorithm**, which quantum machines can use to solve the underlying math exponentially faster.

### What becomes vulnerable:

- Wallets that have ever exposed their public key

- Dormant or Satoshi‑era Bitcoin addresses

- Multisig systems

- Validator signatures

- Smart contracts relying on ECC verification

Once a public key is visible, a quantum attacker could derive the private key.

# Who’s Behind the Research

The paper includes contributors from:

- **Google Quantum AI**

- **Ethereum Foundation** (Justin Drake)

- **Stanford University** (Dan Boneh)

- **Coinbase**

- **Stanford Institute for Blockchain Research**

Google also consulted the **U.S. government** before publishing.

This is not fringe speculation — it’s a coordinated warning from the top of the cryptography and blockchain research world.

# The Path Forward: Post‑Quantum Cryptography (PQC)

Google stresses that **post‑quantum cryptography** is the solution. These are cryptographic systems designed to resist quantum attacks.

### PQC migration challenges:

- Protocol‑level upgrades

- Wallet key rotation

- Exchange and custodian coordination

- Cross‑chain compatibility

- Multi‑year transition timelines

The researchers emphasize that shifting global crypto infrastructure to PQC will require **industry‑wide coordination**.

# What This Means for Bitcoin, Ethereum & the Industry

### Bitcoin

- Uses ECDSA signatures

- Public keys become visible after spending

- Billions in dormant coins are exposed

- Governance makes upgrades slow

### Ethereum

- Also ECC‑based

- More flexible upgrade pathways

- Researchers already exploring PQC‑ready designs

### For Other Blockchains

- Bridges, L2s, and smart contracts must be redesigned

- Custodians must rotate keys

- Users must eventually migrate wallets

Quantum computing is no longer a distant threat. Google’s research places a clear deadline on the crypto industry: upgrade or risk catastrophic key‑breaking attacks by 2029.