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Researchers have demonstrated that secure, symmetric private information retrieval from a single server is achievable using current noisy intermediate-scale quantum (NISQ) devices, overturning previous theoretical limits. This breakthrough leverages immediate photon measurement and fundamental physical laws rather than long-term qubit storage or unproven computational assumptions to protect sensitive data in cloud environments. The result marks a significant step forward for practical quantum cryptography with today's limited hardware.

Surse care acoperăQuantum Zeitgeist, Cybersecurity News, The Quantum Insider

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Researchers Enable Secure Data Retrieval from Single Server Using NISQ Devices

Quantum Zeitgeist2 octombrie 20264 min de cititArticolul și perspectiva sunt în engleză.

For a ten-thousand-bit database demanding a privacy level of one in a million, approximately one thousand qubits now represent sufficient resources for secure retrieval. This contrasts sharply with previous methods requiring either multiple databases or unproven computational assumptions to achieve comparable data protection. Achieving symmetric private information retrieval from a single server was previously considered impossible given unrestricted quantum power but is now demonstrated using readily available noisy intermediate-scale quantum devices.

Protecting sensitive data during remote access remains a key challenge in cryptography; existing methods often require multiple servers or rely on unproven computational assumptions. Symmetric private information retrieval now allows secure extraction of single bits without revealing their location, using only a single server and today’s noisy intermediate-scale quantum (NISQ) devices. This breakthrough overcomes a long-standing barrier previously considered impossible for parties with unrestricted quantum capabilities.…

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