Good Authenticity

The End of Counterfeiting
Powered by NFC NTAG424 DNA

NFC NTAG424 DNA chips embedded in physical goods, linked to on-chain certificates via ATSHI Transaction Chains. One tap with any smartphone proves authenticity — impossible to clone, impossible to fake.

NFC NTAG424 DNA Chip

The Hardware

  • NFC NTAG424 DNA — the most advanced NFC authentication chip by NXP, purpose-built for anti-counterfeiting
  • Each chip generates a unique, cryptographic SUN (Secure Unique NFC) message on every single tap — never the same twice
  • Rolling counter prevents replay attacks — each tap is unique, each verification is fresh, every clone attempt fails instantly
  • Works with ANY NFC-enabled smartphone (iOS 13+ / Android 8+) — absolutely no app required

Tap-to-Trust in 5 Steps

1
Embed
Chip placed in the product
→
2
Register
Certificate minted on-chain
→
3
Tap
Consumer taps — no app
→
4
Verify
SUN checked on-chain
→
5
Trust
Authenticity confirmed

The Blockchain

  • SUN message verified against the on-chain certificate stored on the product's dedicated Transaction Chain
  • On-chain certificate stores: product origin, manufacturing date, authenticity proof, ownership history
  • Chip embedded in product tag, label, packaging, or directly in the product itself
  • Combined with Transaction Chain traceability for full product lifecycle visibility — from factory floor to consumer hands
Why NTAG424 DNA

Military-Grade Authentication in a Chip Smaller Than a Fingernail

The NTAG424 DNA is not just another NFC chip. It is the most sophisticated anti-counterfeiting hardware ever mass-produced — and ATSHI Network unlocks its full potential with blockchain-backed verification.

NFC NTAG424 DNA Chips

Cryptographic SUN

Each tap generates a unique encrypted message using Secure Unique NFC (SUN). It is mathematically impossible to clone or replay — every tap produces a completely new cryptographic signature. Counterfeiters have zero chance.

Rolling Counter

Prevents replay attacks with absolute certainty. If someone copies a tap result, the counter will not match on the next verification. The chip knows how many times it has been read — and the blockchain knows too.

AES-128 Encryption

Military-grade encryption between chip and reader. The same encryption standard trusted by governments and intelligence agencies worldwide. Every communication is shielded from interception.

No App Required

Standard NFC on any modern smartphone — tap and verify in under 3 seconds. No downloads, no accounts, no friction. Your customers simply tap and know. It could not be simpler.

Tamper Detection

The chip can detect physical tampering at the hardware level. Broken seal? Invalid certificate. Removed tag? Authentication fails. The product itself becomes its own security guard.

Cost Effective

~$1 per chip at volume — a fraction of a percent of the product's value. Affordable enough for luxury goods, pharmaceuticals, wine, electronics, and collectibles. Enterprise-grade protection at scale.

Industries

Protecting Every Industry Where Authenticity Matters

From luxury handbags to life-saving pharmaceuticals — Good Authenticity is the universal weapon against counterfeiting. If your product has value, it deserves cryptographic protection.

Luxury & Fashion

Authenticate handbags, watches, sneakers, and haute couture. Digital certificate of authenticity with seamless ownership transfer. Every resale is verified. Every counterfeit is exposed. Luxury brands finally have an unbreakable seal of trust.

Wine & Spirits

Provenance from vineyard to glass, cryptographically proven. Sealed bottle = valid certificate. Opened = ownership transferred. Protect prestigious vintages from fraud. Every bottle tells its true story.

Pharmaceuticals

Anti-counterfeiting for drugs that saves lives. Track from manufacturer to patient. Meet serialization requirements (EU FMD, DSCSA). Counterfeit medicines kill — Good Authenticity stops them at the source.

Collectibles & Art

Digital certificate of authenticity for physical art, limited editions, sports memorabilia, and rare collectibles. Provenance is no longer a paper trail — it is an immutable, verifiable blockchain record.

Electronics & Parts

Verify genuine components. Combat counterfeit parts in aviation, automotive, and medical devices where a fake part can cost lives. Every component authenticated from factory to assembly line.

Food & Agriculture

Organic certification, fair trade verification, origin proof for premium products. Consumers tap and see exactly where their food comes from, how it was produced, and that every claim is real.

Technical Deep Dive

Cryptographic Verification
From Silicon to Blockchain in Milliseconds

The NTAG424 DNA chip and the ATSHI Network smart contracts work in perfect concert to deliver instant, irrefutable proof of authenticity.

  • NTAG424 DNA generates a SUN message containing: UID, read counter, random number, and CMAC (Cipher-based Message Authentication Code)
  • SUN message sent to the ATSHI verification endpoint — lightning-fast, globally distributed
  • Verification smart contract checks CMAC against stored key, validates the rolling counter, confirms the on-chain certificate

Verification Pipeline

NTAG424
UID + Counter + Random + CMAC
→
Network
CMAC verified, counter validated
→
Chain
Verification event recorded on-chain
→
Result
Authentic Counterfeit Tampered
  • Result returned instantly — in under 2 seconds, anywhere in the world
  • Ownership transfer: current owner taps → signs transaction → transfers certificate to new owner — all on-chain
  • History is immutable: every verification, every ownership change, every event recorded permanently on the product's Transaction Chain
Comparison

Nothing Else Even Comes Close

See how ATSHI + NTAG424 DNA obliterates every existing authentication solution on every dimension that matters. This is not an incremental improvement — it is a generational leap.

Feature QR Codes Standard NFC Certilogo VeChain ToolChain ATSHI + NTAG424
Clone Protection None (copyable) Basic UID Cloud-based Basic Cryptographic SUN
Replay Attack Vulnerable Vulnerable Cloud check Limited Rolling counter
App Required Camera Yes Yes Yes No — native NFC
Blockchain Proof No No No VeChain (public) Native Transaction Chain
Ownership Transfer No No No Limited On-chain, verifiable
Cost per Unit ~$0.01 ~$0.15 Subscription ~$0.10–0.30 ~$1
Tamper Detection No No No No Yes (chip-level)
Privacy None Limited Cloud-dependent Public chain Per-field encryption
Management Tool

ULTIM TRUST — Configure NFC & GS1 Digital Link

ULTIM TRUST is the dedicated management platform for configuring NFC NTAG424 DNA chips and GS1 Digital Link pages on ATSHI Network.

NFC NTAG424 Provisioning

Register chips, bind them to on-chain product certificates, configure SUN authentication parameters — all from a single interface.

GS1 Digital Link Page Designer

Define product information pages, traceability dashboards, certification views, and recall notices — published directly on-chain via ATSHI Web.

QR Code Generation

Auto-generate GS1-compliant QR codes linked to the on-chain resolver — ready for product packaging.

Multi-Product Management

Manage entire product catalogs with GTIN registration, lot tracking, and template assignment.

NFC NTAG424 Register chip → bind to product certificate → configure SUN auth → deploy
GS1 Digital Link Design product pages → publish on-chain → generate QR code → ready for packaging

www.ultim-trust.com

Protect Your Products with Good Authenticity

Counterfeiting costs the global economy over $500 billion per year. Your brand, your customers, and your revenue deserve better than QR codes and paper certificates. Deploy NFC NTAG424 DNA + ATSHI Network and give every product an unbreakable, tap-to-verify proof of authenticity that lives forever on the blockchain.

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