Is my Bitcoin public key exposed?

If you have EVER sent Bitcoin from an address, your public key is exposed on the blockchain forever. Only addresses that have NEVER sent outgoing transactions have unexposed public keys.

How can I check if my Bitcoin is at quantum risk?

Check your address on a blockchain explorer. If it shows any outgoing transactions, your public key is exposed. Legacy P2PKH addresses starting with 1 are most at risk.

What percentage of Bitcoin is quantum vulnerable?

Approximately 4 million BTC (~$250 billion) are in addresses with exposed public keys, making them immediately vulnerable when quantum computers become capable.

🔑 Is Your Public Key Exposed?

Bitcoin Quantum Risk Calculator

📋 How Public Keys Get Exposed

Fresh Address

Only receive, never send

✅ Public key hidden

→

First Send

You sign a transaction

⚠️ Signature created

→

Forever Exposed

Public key on blockchain

🔴 QUANTUM VULNERABLE

🧮 Quantum Risk Assessment

Address Type	Ever Sent From?	Public Key Status	Quantum Risk
Legacy (1...)	Yes	EXPOSED	🔴 CRITICAL
Legacy (1...)	No	Hidden	🟡 Medium
SegWit (3... or bc1q...)	Yes	EXPOSED	🔴 CRITICAL
SegWit (3... or bc1q...)	No	Hidden	🟡 Medium
Taproot (bc1p...)	Yes	EXPOSED	🔴 CRITICAL

Note: Even "hidden" keys become exposed the moment you spend. And once quantum computers arrive, you can't safely spend without exposing yourself.

🔍 Check Your Address

Go to a blockchain explorer (blockchain.com, blockstream.info)
Enter your Bitcoin address
Look for "Sent" transactions
If ANY exist → Your public key is EXPOSED

📊 The Exposure Statistics

~4M BTC In exposed addresses

$250B+ Value at immediate risk

20%+ Of circulating supply

🛡️ Migrate Before Quantum Arrives

Don't wait until your exposed keys become exploitable:

Download SynX Wallet Migration Guide