Storage Material:
The DNA itself can be stored in a variety of encapsulated forms:
- Silica beads (like those used in academic long-term preservation)
- Glass ampoules, vacuum-sealed
- Or even polymer-encapsulated capsules
These are chemically stable, compact, and proven to withstand extreme conditions (heat, UV, oxidation). The goal is to create a medium that's not just durable, but also independent of contemporary electronics.
But how is this better than a stainless steel or titanium plate? Plates already accomplish what you're attempting to solve and they're significantly simpler and more reliable (especially titanium).
A smaller storage vessel is not necessarily better... The smaller it is, the more fragile it is, and the easier it is to lose.
I think you'll have a hard time convincing people their keys are safer in DNA glass ampoules than they are on a solid piece of metal
