Physical key-protected one-time pad.

Area of Science:

• Quantum Cryptography
• Materials Science
• Information Security

Background:

• Current cryptographic protocols rely on electronic key storage, which is vulnerable to probing, duplication, and selective resetting.
• The security of mobile communication is increasingly dependent on robust hardware, yet this remains a critical weak link.
• There is a need for secure communication methods that do not rely on traditional electronic key management.

Purpose of the Study:

• To introduce a new encrypted communication principle that eliminates the need for electronic key storage.
• To demonstrate the generation and utilization of secure cryptographic randomness from physical scattering materials.
• To enhance the security of communication hardware by leveraging unique physical object properties.

Main Methods:

• Utilized unique volumetric scattering materials (2 mm³) to store random cryptographic bits.
• Employed a shared set of patterned optical probes to generate statistically verified randomness.
• Implemented a modified one-time pad protocol for information-theoretically secure communication.

Main Results:

• Successfully generated 10 gigabits of statistically verified randomness between two unique scattering objects.
• Established a secure communication link without electronically saving cryptographic keys.
• Demonstrated the inherent security benefits of volumetric physical storage over electronic memory, preventing bit probing or alteration without affecting the entire key space.

Conclusions:

• The described encrypted communication principle offers a secure alternative to traditional key management systems.
• Volumetric physical storage of cryptographic randomness provides enhanced security and tamper resistance.
• This method has the potential to significantly strengthen the hardware security of cryptographic protocols for mobile communications.