RFID Card Encoding Service

RFID encoding services we offer

Encoding is run as a dedicated production line, not an afterthought at packing. The line writes everything from a simple locked UID to a full DESFire application layout with diversified keys, and the same formats run whether the order is a thousand cards or a transit-scale program. Every format below is read-back verified on 100% of cards.

• 100%Read-back verified
• 6+Encoding formats
• Any systemCompatibility
• IncludedEncoding database

• UID reading and database generation: the factory-assigned UID of every card is read and delivered as a CSV or Excel database mapping card numbers to UIDs for import into your access or management system.
• NDEF programming: URLs, vCards, Wi-Fi credentials, text records and custom NDEF messages written to NFC cards (NTAG 213/215/216, NTAG 424 DNA) for tap-to-open experiences.
• MIFARE Classic sector encoding: data writes plus sector key (Key A / Key B) configuration with custom access conditions for access control, parking and loyalty systems.
• MIFARE DESFire application setup: application directories, AES keys, file access rights and initial data values for transit, campus and corporate badge programs.
• Hotel lock and access formats: pre-encoding for Assa Abloy (VingCard), Salto, Dormakaba, Onity and HID-format systems so cards work on arrival.
• GS1 and custom structures: SGTIN-96 EPC encoding for retail-mandate programs, plus proprietary binary formats with password protection per your encoding specification document.

From data file to verified shipment — the encoding workflow

Every encoding job follows the same documented path, and each step generates a record kept in the quality archive. Buyers who have been burned by mis-encoded batches will recognize what this workflow is designed to prevent: a specification ambiguity discovered at card 40,000 instead of card one. The first-article step exists precisely so disagreements surface before volume runs.

1. 1. Specification

   You send an encoding spec document, data file or sample card; we confirm the format interpretation in writing.

2. 2. Scheme lock

   The encoding scheme is locked on the production traveler with your data files attached.

3. 3. First-article check

   Initial encoded cards are verified — and where hardware is specified, tested on the actual reader or lock.

4. 4. Production encoding

   Full run encoded with 100% read-back verification; failed cards auto-rejected and replaced.

5. 5. Deliverables

   Cards ship with the encoding database and a functional test report on the lot.

1. Step 1
   Accepted inputs: an encoding specification document, a CSV/Excel data file, or a working sample card our engineers can read to reverse-engineer the format.
2. Step 2
   Written confirmation of the format interpretation before anything is encoded — byte order, data layout and lock behavior spelled out.
3. Step 3
   First-article verification, with functional testing on the specified reader or lock hardware for access-control formats.
4. Step 4
   100% read-back verification during the run, with the encoding database (CSV, Excel or XML) and functional test report delivered with the shipment.

Variable print and encode matching

The hardest encoding jobs are the ones where the printed card and the chip data must agree: a badge whose printed number matches its sector data, a gift card whose barcode matches its UID record. Doing this in two facilities invites mismatches that surface at the help desk. We run print and encode as one matched workflow on the same floor, verified per card before packing.

• Printed serial to chip data matching: sequential numbers, barcodes or QR codes printed on the card and verified against the encoded value on that same card.
• Laser-engraved serialization and variable-data inkjet overlays run in the same traveler as the encoding pass, so numbering can never drift out of sync with data.
• Database deliverable ties it together: each card's printed number, UID and encoded fields delivered as one mapping file for clean system import.
• Mixed personalization: per-card names or photos (printed) combined with per-card credentials (encoded) within a single batch — common for employee badge and student ID programs.
• Artwork-side details — print processes, file requirements, proofing — live on the card printing page; this page owns the data side.

Quality assurance for encoded cards

An encoding defect is worse than a print defect: it is invisible until a card fails at a door, a gate or a checkout. The QA stack below is built around that asymmetry — verification on every card rather than samples, hardware-level testing where the deployment system is known, and a paper trail that lets any card be traced back to its batch, operator and equipment years later.

• 100% read-back verification: after encoding, every card is read back to confirm the written data matches specification exactly; failed cards are automatically rejected and replaced.
• Encoding database deliverable: a complete file (CSV, Excel or XML) mapping each card's printed number or sequence ID to its encoded data, UID and variable fields.
• Hardware functional testing: for access-control formats, a random sample from each batch is tested on the specified reader or lock hardware to confirm real-world compatibility.
• Batch traceability: every encoding batch is documented with date, operator, equipment ID and verification results, with quality records retained for at least seven years per ISO 9001.
• Documented test report: a functional read report on the encoded lot ships with every order.

• ✓100% read-back verification on every encoded card
• ✓Encoding database deliverable (CSV, Excel or XML)
• ✓Functional testing on specified reader or lock hardware
• ✓Secure data handling with encrypted transfer and air-gapped encoding
• ✓Full batch traceability with date, operator and equipment records

How keys and credential data are handled

Encoding services routinely involve the most sensitive material a card program has: master keys, access credentials, member data. Handling is procedural, not ad hoc — the same controlled steps run for a boutique hotel's lock cards and a transit authority's fare cards. Nothing about your key hierarchy or data files touches a networked production system, and disposal follows your retention instructions.

• Encrypted transfer: encoding specifications, key files and credential data move via PGP-encrypted email or secure file sharing — never plain attachments.
• Air-gapped encoding stations: keys are loaded onto isolated systems and never stored on networked machines.
• Key diversification: per-card derived keys for MIFARE Plus, DESFire and NTAG 424 DNA programs, so no two cards share a secret.
• Optional escrow: master keys are escrowed only on explicit customer instruction; otherwise all key material is securely deleted after production.
• NDAs and data processing agreements signed as needed, with deletion confirmed per your data retention requirements.

Why encode at the factory instead of on-site

On-site encoding looks free until you price the throughput. A desktop card printer encodes at roughly 4-8 cards per minute, which makes any issuance beyond a few thousand cards a staffing problem — someone feeding a printer for days, with no read-back verification and no database deliverable at the end. Factory encoding moves that work onto production equipment and ships cards that are already live.

• Throughput: factory encoding lines process volume runs as a production step, against the 4-8 cards per minute ceiling of on-site card printers.
• Cost structure: basic encoding (UID databases, NDEF writing, simple data) is included at no extra charge on volume orders; complex schemes are quoted upfront as a small per-card fee.
• No equipment or labor on your side: no encoding stations to buy, no operators to train, no half-finished batches when a printer jams.
• Deployment-ready delivery: hotel cards open doors on arrival, badges import from the supplied database, NFC cards resolve their URLs out of the box.

FAQ