Open-source passive NFC tag that signs with ECDSA, verified on-chain
Details
- External ID
- 49712073
- Source
- HN
- Company
- —
- Product
- Open-source passive NFC tag that signs with ECDSA, verified on-chain
- Website domain
- github.com
- Launched
- Sept. 15, 2026
- Cohort
- —
- Upvotes
- 9
- Upvotes percentile
- 0.5422647527910686
- Tags
- —
- Fetched at
- Sept. 19, 2026, 5:01 p.m.
- Updated at
- Sept. 19, 2026, 5:01 p.m.
Enrichment
- Theme
- email design, templates, and productivity
- Vertical
- Security
- Function
- Hardware & robotics
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- open-source nfc hardware for on-chain ecdsa signature verification
- Manually corrected
- False
Could you build this?
No This project involves custom hardware engineering of an energy-harvesting passive NFC PCB capable of asymmetric cryptography and matching on-chain smart contracts.
What it would actually take: The stack requires a custom passive NFC circuit using an energy-harvesting secure element or low-power microcontroller (such as an NXP or ST micro running an ECDSA secp256k1 or ed25519 routine purely off RF field power) paired with an EVM smart contract that validates the cryptographic signature. The hard parts are RF antenna impedance matching, power budgeting for asymmetric crypto on passive harvested energy, and secure hardware key storage. It demands deep hardware/EE design and embedded cryptography expertise.
Discussion
No comments on this launch.
Competitors
Other products that read as similar to this one — 81 launches clear the similarity bar, closest 8 shown.
Attention rank: #41 of 82 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 304 days after the earliest competitor.
- NFC tags are good material for pranks on Android · hn · 2026-05-06 · 18 upvotes · similarity 0.62
- NFC Energy-Harvesting PCB Business Card with an MCU · hn · 2026-08-28 · 231 upvotes · similarity 0.56
- Open security key on nrf52480 with NFC · hn · 2026-04-20 · 5 upvotes · similarity 0.52
- NFC Studio · ph · 2026-09-16 · 1 upvotes · similarity 0.50
- onarv · ph · 2026-09-19 · 1 upvotes · similarity 0.47
- A minimal and beautiful card component built with pure CSS · hn · 2026-06-24 · 9 upvotes · similarity 0.45
- psstpsst · github · 2026-09-12 · 8 upvotes · similarity 0.41
- OpenPayphone · hn · 2026-06-07 · 23 upvotes · similarity 0.40
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a hardware & robotics tool for Horizontal yet.