What Is Harvest Now, Decrypt Later?

Harvest Now, Decrypt Later: The Immediate Quantum Threat

What Is HNDL?

Harvest Now, Decrypt Later (HNDL) is a surveillance and data theft strategy where adversaries collect encrypted data today — data they cannot currently read — with the intention of decrypting it when quantum computers become powerful enough.

Why It Makes the Quantum Threat Urgent TODAY

Most people think: "Quantum computers that can break crypto are years away, so I don't need to worry now." HNDL eliminates this reasoning.

If an adversary collects your encrypted private key backup, your HTTPS-encrypted wallet recovery, or your signed blockchain transactions today, they can wait 5–10 years for quantum computers and then decrypt them. Your data is at risk from actions you take today.

Real-World HNDL Attacks

Intelligence agencies have confirmed HNDL is an active strategy:

• CISA (US Cybersecurity Agency) has issued warnings about HNDL
• NIST cites HNDL as a key driver of urgent PQC adoption
• Nation-state actors are believed to be actively harvesting data

What Data Is at Risk?

• Blockchain private keys stored in encrypted form online
• Encrypted wallet backups
• Transaction data revealing wallet history
• Any sensitive financial data with long-term value

The BMIC Solution

BMIC's quantum-safe wallet uses NIST FIPS 203/204/205 algorithms that are believed to be secure against quantum computers. Even if an adversary harvests data from BMIC wallet transactions today, there is no known quantum algorithm that can decrypt it.

This is why waiting until quantum computers arrive is too late. BMIC solves the problem now.