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Quantum Secrets: How Extendible States Limit Secure Communication

10.11.2025 by Ray Dalio

The limitations of quantifying entanglement distillability—specifically, the abrupt falloff in achievable key rates for low numbers of quantum copies—highlight a fundamental constraint: even in theory, extracting secure keys relies on replicating fragile quantum states enough times to overcome the inevitable decay introduced by imperfect measurement, a decay that quickly renders the calculation meaningless as the number of copies dwindles.

New research reveals fundamental limits on how much secret key can be extracted from quantum states, impacting the security of future communication networks.

Categories Science

When AI Agents Talk: Uncovering Hidden Security Risks

10.11.2025 by Ray Dalio

A multi-agent protocol inherently presents a complex attack surface vulnerable to threats spanning injection, interception, replay, poisoning, and unauthorized access, demanding a holistic security approach that considers the interplay of these potential exploits.

A new analysis reveals critical vulnerabilities in how artificial intelligence agents communicate, potentially exposing systems to attack.

Categories Science
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