Scientists just sent secret codes from Tokyo to Paris using matching DNA strands, and it's basically impossible to hack.
March 19, 2026
Original Paper
Synchronized DNA sources for unconditionally secure cryptography
arXiv · 2603.17149
AI-generated illustration
The Takeaway
While most digital security relies on math problems that are just very hard to solve, this system uses the physical properties of synchronized DNA molecules. By sequencing these identical biological samples in two different cities, the team created a shared encryption key that is physically impossible to crack, even by a computer with infinite power.
From the abstract
Secure communication is the cornerstone of modern infrastructures, yet achieving unconditional security -resistant to any computational attack- remains a fundamental challenge. The One-Time Pad (OTP), proven by Shannon to offer perfect secrecy, requires a shared random key as long as the message, used only once. However, distributing large keys over long distances has been impractical due to the lack of secure and scalable sharing options. Here, we introduce a DNA-based cryptographic primitive t