Post-quantum world
Also written: Post-quantum era
The future era when quantum computers could break current encryption standards.
The post-quantum world is a future time when very powerful quantum computers might exist. These computers could break the math used to protect most of our online data today, like credit card numbers and private messages.
Think of it like this: today's security codes are like a very strong lock that only a specific key can open. Quantum computers, if built to a certain scale, could be like a master key that opens many of those locks easily. This means we need to develop new kinds of security before that happens.
The post-quantum era refers to a future state where large-scale, fault-tolerant quantum computers are capable of breaking widely used public-key cryptography, such as RSA and ECC. This is primarily due to Shor's algorithm, which can efficiently factor large numbers and compute discrete logarithms, the mathematical underpinnings of these cryptosystems.
Transitioning to this era necessitates the adoption of post-quantum cryptography (PQC) algorithms that are resistant to attacks from both classical and quantum computers. Research and standardization efforts, such as those by NIST, are underway to select and deploy these new cryptographic primitives.
This term is relevant now because frontier AI labs are exploring the capabilities of advanced AI models. The Anthropic example shows AI being used to find weaknesses in current cryptographic systems, highlighting the urgency of preparing for a post-quantum world where these systems might fail.
- Discovering cryptographic weaknesses with ClaudeAnthropic · Anthropic Research ·
- Anthropic Claude
- Anthropic's AI research touches on cryptographic weaknesses, which are central to the challenges of a post-quantum world.
- Quantum supremacy
- This refers to the point where quantum computers can perform
- Quantum entanglement
- This is a quantum mechanical phenomenon where particles be
- Post-quantum cryptography
- This is the set of cryptographic algorithms designed
The term 'post-quantum world' emerged from discussions within the cryptography and computer science communities as the threat posed by theoretical quantum computers to current encryption became apparent.
While you can't directly experience the post-quantum world, you can explore AI's role in security. Ask Claude or ChatGPT to explain how RSA encryption works, then ask it to explain how Shor's algorithm could break RSA. This demonstrates the AI's understanding of the cryptographic principles at risk.
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Questions people ask
- When will the post-quantum world arrive?
- There is no set date. Experts estimate it could be anywhere from 10 to 30 years away, depending on the pace of quantum computer development.
- What can be done to prepare for the post-quantum world?
- The main preparation involves developing and implementing new encryption methods called post-quantum cryptography (PQC) that are resistant to quantum attacks.
First seen on Subvolts Jul 29, 2026. Updated Sep 15, 2026. Written by an AI model from the items above and reviewed against them weekly; report an error.