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‘Q-Day’ Could Be Cybersecurity’s Armageddon

Summary by The Week
A hypothetical doomsday for quantum computing could be on the horizon, computer scientists have warned for decades. But cybersecurity experts are now racing against the clock after Google announced that this “Q-Day” could be here much sooner than originally anticipated.What is ‘Q-Day’?It is the hypothetical day that quantum computers will acquire “enough resources and stability to crack conventional cryptography,” said CNN. When that day arrives…

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Quantum computers will pose a serious threat to current cryptographic standards, particularly encryption and digital signatures. The threat to encryption is significant today, Google announced in March 2026. This is primarily due to so-called Q-Day, the moment when quantum machines will break the security measures protecting banks, messaging apps, and government data.

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Polsat News broke the news on Monday, May 25, 2026.
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