NFC ID Reader: Chip ID Card

NFC ID Reader opens the chip inside a Vietnamese citizen ID card (CCCD gắn chip) or any ICAO e-passport and shows exactly what that chip stores.

Card data never leaves the phone: no database, no analytics, and nothing read from a card is sent to us or an ad network. Leaving the result screen wipes it from memory.

HOW IT WORKS
1. Show the card to the camera: the app reads the QR code or the code lines. Or type the numbers.
2. Hold the card flat against the back of the phone.
3. The app opens the chip with PACE or BAC (ICAO Doc 9303) and reads it. Card moved? Put it back: the read continues where it stopped.

WHAT YOU SEE
• Portrait photo from the chip
• Vietnamese details with full diacritics, plus the raw chip list
• Passports: extra holder and document details when the chip has them
• The code lines, with country names spelled out
• Validity at a glance, with an optional renewal reminder in your own calendar

CARD FACE VS CHIP
The app compares what is printed (QR code, code lines, or printed text read by the camera) with the chip, field by field. Camera reading can be wrong, so a difference is a reason to look closer, not a verdict on the card.

WHAT WAS ACTUALLY PROVEN
A panel separates reading a card from proving one. Each row is green, red, or unanswerable.
• The chip opened: a copied chip opens too, so alone this proves nothing.
• Data matches the chip's signed index (EF.SOD), and that signature is valid.
• Chip answers (AA / CA): the chip signs a fresh challenge with a key it never reveals.
• Issued by the country: needs that country's root certificate (CSCA). You can import a master list or certificates from an official source; they stay on the phone.

When a read fails, the app names the likely cause (wrong key, card moved, no answer) and flags characters often misread in the document number.

MORE CHECKS
• Check ID number: how a Vietnamese ID, passport or check-digit number is built, no chip needed. It does not show that a number was issued.
• Age check from photos: pick photos of code lines, get a table of ages and validity. No NFC needed.
• Verify PDF report: check that a report saved by this app was not edited since.

MULTI-CARD SESSION
Read several cards in a row (front desk, check-in), see who was read twice, which cards expired, and which documents belong to the same person. Export a masked CSV. Free sessions hold 3 cards. Kept in memory only.

FOR OTHER APPS
Another app can ask for a read. You see which app asks and tick each field before anything is sent.

NFC TAGS
To write or copy NFC tags, the app sends you to NFC Tools. ID Reader focuses on reading and checking documents.

PRIVACY
Optionally block screenshots of document data and hide it in recent apps. Phone check shows whether NFC is on without reading card contents.

FREE WITH ADS, OR PRO
• Reading ID cards and passports is free and never shows an ad. The free version shows one banner on the home screen only. Ads come from Google AdMob and Unity Ads, which use your advertising ID; card data is never passed to them.
• Pro (monthly, 3-month, or yearly with a 3-day free trial) removes the banner and unlocks PDF reports with a seal, chip photo export, unlimited sessions, Excel export, guest register and lodging list, guest-list match, self check-in and larger photo batches. A short optional video opens some tools for 30 minutes.

BEFORE YOU USE IT
Read your own card, or one whose holder has agreed. Vietnamese law (Luật Căn cước 2023, Nghị định 70/2024/NĐ-CP) treats identity data as sensitive personal data and requires consent.

Requires a phone with NFC, Android 7.0 or newer.