Q-DAY: What Happens When Quantum Computers Break Encryption?

Q-Day is the moment when a sufficiently powerful quantum computer could threaten some of the encryption protecting the modern digital world.

What would actually happen to online banking, secure communications, digital signatures and internet security — and why are governments and technology companies already preparing for it?

In this Colossal Logic documentary, we explore Shor’s algorithm, qubits, quantum error correction, “harvest now, decrypt later,” public-key encryption and post-quantum cryptography — and the global race to replace today’s digital locks before powerful quantum computers arrive.

From the mathematics behind internet security to the machines that could challenge it, discover why Q-Day may become one of the most important technological milestones of the coming decades.

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Chapters:
00:00 Q-Day
00:47 The Mathematics Protecting the Internet
02:04 Shor’s Algorithm
02:25 Why Quantum Computers Aren’t Ready Yet
02:57 Quantum Error Correction
03:28 Harvest Now, Decrypt Later
04:23 Post-Quantum Cryptography
04:58 The Global Migration
06:26 What Actually Happens on Q-Day?
08:05 The Race Against Time

Further reading / Sources:
NIST Post-Quantum Cryptography:

Google Cloud Post-Quantum Cryptography:

#QuantumComputing #Cybersecurity #Encryption

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