Bitcoin Quantum Checker

Threat Overview

The Quantum Risk

Quantum computers running Shor's algorithm could theoretically derive a Bitcoin private key from its corresponding public key — breaking ECDSA-256 cryptography that secures every wallet.

Scale of Exposure

~4M BTC

Estimated amount of Bitcoin held in addresses with exposed public keys (P2PK, reused P2PKH), making them potentially vulnerable to future quantum attacks.

Key Vulnerability

Public Key Exposure

Once a Bitcoin address is spent from, its public key becomes visible on-chain. If you've never spent from an address, only the hash is exposed — a much stronger barrier.

Current Status

Not an Immediate Threat

Today's quantum hardware is far too noisy and limited. Cryptographers estimate a capable quantum machine would require millions of stable logical qubits — years or decades away.

Address Vulnerability Checker

Supports Legacy (P2PKH), Nested SegWit (P2SH), Native SegWit (Bech32) and Taproot (P2TR) formats

⬡ ANALYSIS RESULT ·

Queried Address

⚠

Incomplete Verification — Data Unavailable

Address Type

—

Pub Key Exposed

UNKNOWN

Quantum Risk

UNRESOLVED

⚑ Notice: Full quantum vulnerability assessment requires live blockchain data access, public key exposure analysis, and UTXO history inspection — capabilities not yet available in this tool. This is a research prototype. No assessment has been performed on the address above. Do not rely on this tool to make security decisions.

Projected Quantum Threat Timeline

2024–25

IBM, Google and others surpass 1,000 physical qubits. Quantum systems remain noisy and error-prone — no cryptographic threat to Bitcoin.

2028–32

Error-corrected logical qubits expected to scale. First demonstrations of quantum advantage in specific algorithms. Bitcoin developers begin active post-quantum migration research.

2033–40

Potential window where "harvest now, decrypt later" attacks on exposed public keys could become viable. Reused addresses and P2PK outputs become highest risk.

2040+

If Bitcoin has not migrated to post-quantum cryptography (e.g. CRYSTALS-Dilithium, FALCON), wallets with exposed public keys face serious existential risk.