Overview
- The Franco-Japanese team in Tokyo, which staged the demo Wednesday during Emmanuel Macron’s visit, exchanged a document using identical DNA-derived keys made in Paris and Tokyo.
- Sequencing turned synthetic DNA strands into random binary masks to run a Vernam one-time pad, which needs a key as long as the message, true randomness, and single use.
- Because DNA is dense and stable, the teams say tiny vials can hold pre-shared keys for decades while using synthetic strands that carry no genetic information.
- The protocol includes checks to spot interception, such as noticing a missing twin sample during key reconciliation or detecting extra copies by measuring read counts at sequencing.
- Researchers tout distance-insensitive key sharing compared with quantum methods, yet they flag long sequencing times, high costs, and the fact the results are only in an unreviewed preprint.