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PlonkR Geo

Geocaching with tamper-proof NFC tags: every scan produces a cryptographically signed proof of discovery.

Status
Beta
Access
Access on request Closed beta, no open registration
Stack
SvelteKit · FastAPI · NTAG 424 DNA
Open the site geo.plonkr.de
PlonkR Geo home page with a map of nearby caches

PlonkR Geo replaces the self-reported find in geocaching with technical proof. Each cache contains an NFC tag that generates a new, signed code with every scan. Older codes lose their validity.

A logged find therefore requires actually being at the cache.

The application runs in the browser without an additional app and is in a closed beta.