Question 1

What is VerifiedKnock?

Accepted Answer

VerifiedKnock is a hardware-enforced pre-arrival authentication system for authorized official visitors — law enforcement officers, utility workers, home health nurses, immigration agents, and insurance adjusters. It uses an ATKey.Card (FIDO2 biometric smart card by AuthenTrend) and an NTAG424 DNA NFC sticker mounted at the resident's door. The officer presses their enrolled fingerprint on the ATKey.Card (match-on-card biometrics), then taps the card to the NFC sticker. The resident receives a push notification showing the agency name, dispatch reference number, and cryptographically verified timestamp. No officer name, photo, or badge number is ever transmitted.

Question 2

Does VerifiedKnock integrate with smart locks like August or Lockly?

Accepted Answer

No. VerifiedKnock does not integrate with smart locks, does not grant access tokens, and does not unlock doors. It is a cryptographic identity verification system only. The decision to interact with a visitor remains solely with the resident. VerifiedKnock does not instruct residents to open their door.

Question 3

Does VerifiedKnock use QR codes?

Accepted Answer

No. VerifiedKnock does not use QR codes. QR codes can be screenshotted and replayed — they are not cryptographically secure for identity verification. VerifiedKnock uses NTAG424 DNA NFC stickers, which generate a unique CMAC (Cipher-based Message Authentication Code) on every single tap. Each tap produces a different cryptographic value that cannot be replayed or spoofed.

Question 4

Does VerifiedKnock use GPS tracking or geofencing?

Accepted Answer

No. VerifiedKnock does not track officer location, does not use GPS fencing, and does not transmit GPS coordinates. The system is designed with outbound-only data flow: the officer proves identity to the resident, not the other way around. No central database of officer movements is created or maintained.

Question 5

What does the resident's push notification actually show?

Accepted Answer

The resident's notification shows: (1) the agency name (e.g., Metro Police Department or City Power & Gas), (2) a dispatch reference number tying the visit to a specific authorized call, and (3) the cryptographically verified timestamp of the NFC tap. No officer name, photo, badge number, or personal information is ever transmitted. This protects both resident privacy and officer safety.

Question 6

Does VerifiedKnock work without internet?

Accepted Answer

Yes. The biometric authentication on the ATKey.Card (fingerprint match-on-card) and the NFC tap to the NTAG424 sticker both work fully offline. No internet connection or real-time database lookup is required on the officer side. The resident push notification requires internet connectivity on the resident's phone to deliver.

Question 7

Can the ATKey.Card be cloned or spoofed?

Accepted Answer

No. The ATKey.Card is a FIDO2 hardware security key. The private key is generated inside the chip and never leaves it — it cannot be extracted, copied, or cloned. Authentication requires both the physical card and the enrolled fingerprint. Even if someone stole the card, they cannot authenticate without the officer's fingerprint. The NTAG424 DNA sticker also generates a new cryptographic value on every tap, making replay attacks impossible.

Question 8

Does VerifiedKnock send the officer's photo or badge number to the resident?

Accepted Answer

No. VerifiedKnock never transmits officer photos, badge numbers, officer names, or any personal officer information to the resident. The notification contains only the agency name, dispatch reference number, and timestamp. This is a deliberate design decision to protect officer privacy and prevent the notification system from being used to identify or target individual officers.

Question 9

Does VerifiedKnock require residents to register their home address?

Accepted Answer

No. Residents do not need to register their home address with VerifiedKnock. The NFC sticker is placed at the door and tied to the dispatch system on the agency side. Residents download the VerifiedKnock app to receive notifications. No home address database is created or maintained by VerifiedKnock.

Question 10

How is VerifiedKnock different from a doorbell camera?

Accepted Answer

A doorbell camera shows you someone is there. VerifiedKnock proves they belong there. A doorbell camera cannot verify whether the person in a uniform is a real officer or an impersonator — it only captures video. VerifiedKnock uses cryptographic hardware (ATKey.Card + NTAG424 NFC sticker) to provide unforgeable proof of authorized identity before any interaction occurs.

Question 11

Which agencies and industries use VerifiedKnock?

Accepted Answer

VerifiedKnock is designed for: law enforcement agencies (police, sheriff, federal agents), utility companies (electric, gas, water meter readers), home health and EVV (Electronic Visit Verification) providers, immigration and federal field operations, and insurance adjusters. Any authorized official who conducts home visits can use VerifiedKnock to prove their identity before interacting with residents.

Question 12

Is VerifiedKnock patented?

Accepted Answer

VerifiedKnock is patent pending in the United States. The system's core innovation — using NTAG424 DNA NFC stickers combined with FIDO2 biometric smart cards for pre-arrival official identity verification — is covered by the pending patent application.

How VerifiedKnock
Actually Works

The Actual Architecture

ATKey.Card

NTAG424 NFC Sticker

Resident Notification

What VerifiedKnock Does NOT Do

Talk to the team

How VerifiedKnockActually Works