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Compatible RFID & proximity credentials
The specialists who know every card format.
Security ID Systems supplies compatible access-control cards, key fobs and credentials for 332+ formats — including the specialist proprietary formats other vendors never offer compatibles for. A fraction of OEM pricing — compatible by specification, independently manufactured.
The format authority
Why a compatible exists — and why we're the ones who make it
The formats few suppliers stock
Security ID Systems specialises in the proprietary proximity and smart-card formats many vendors don't offer — from mainstream HID and EM to legacy and specialist systems. We cover 332 compatible formats across 118 brands, each encoded to read identically on your existing readers.
Compatible by specification, not look-alike
Every credential is encoded to present the exact data your readers already accept — the same frequency, bit format, facility code and card number. Built on proven T5577, EM4305 and 13.56 MHz smart-card and iCLASS-class platforms, engineered to read identically to the original.
Matched to your system's security model
Open proximity and UID formats we encode directly to a compatible credential that reads identically on your equipment. For high-security encrypted systems such as AES smart cards and Seos, our detailed format guides explain exactly how each system works and what your options are.
Shop by technology
Find your credential type
125 kHz LF Proximity Cards & Fobs
Compatible low-frequency proximity cards and key fobs encoded to read identically to the origi…
51 formats13.56 MHz HF Smart Cards
13.56 MHz contactless smart cards for access-control and transit, plus compatible iCLASS and L…
37 formatsWiegand Bit-Format Cards
Compatible cards programmed to the exact Wiegand bit structure your panel expects — from 26-bi…
14 formatsHigh-Security & Custom Formats
Compatible blanks for registered and custom facility-code formats — Corporate 1000, Indala Fle…
15 formatsLegacy OEM Proximity
Compatible replacements for Indala, AWID, Kantech ioProx, Keri and Farpointe proximity credent…
64 formatsEnterprise Proprietary Formats
Compatible credentials for enterprise systems few other suppliers offer — Gallagher/Cardax, Ne…
24 formatsManaged & Cloud Access
Compatible cards and fobs for managed and cloud-based access platforms such as Kastle, Verkada…
10 formatsHotel Lock Key Cards
Compatible bulk key cards for hotel locking systems — VingCard, Saflok, Onity, Salto and speci…
57 formatsIntercom & Residential Entry Badges
Compatible residential and building-intercom badges and tokens — Noralsy, Urmet, CAME, Comelit…
12 formatsGate & HOA Fob Replacements
Compatible replacement fobs and cards for gated communities and HOAs — DoorKing, Linear, Norte…
12 formatsBlank Programmable Cards
Rewritable T5577, EM4305 and UID-writable blanks — the programmable backbone every compatible …
70 formatsNFC Tags & Cards
NFC Forum compliant cards and tags for NFC applications, encoding and consumer tap experiences…
3 formatsSpecialist & legacy formats
Compatibles others won't make
Kastle Systems 32-bit
Compatible with Kastle Systems
- Chip
- T5577 / EM4305
- Format
- 32-bit Kastle format: facility code + card n…
Lenel 42-bit (L11601-adjacent)
Compatible with Lenel
- Chip
- T5577 / EM4305
- Format
- 42-bit: parity + 14-bit site + 12-bit card +…
Verkada Pass / Verkada One (Ucode 9 UHF)
Compatible with Verkada
- Chip
- T5577 / EM4305 · 13.56 MHz smart card
- Format
- Verkada Pass / Verkada One - 140x88mm card o…
Gallagher / Cardax IV (LF 125 kHz)
Compatible with Gallagher
- Chip
- T5577 / EM4305
- Format
- Gallagher LF format: 4-bit region code (A-P)…
HID Seos
Compatible with HID Global
- Chip
- Secure microcontroller / Java Card secure element
- Format
- Seos applet on secure element; AES-128; SIO/…
CISA CT6 (1K contactless smart card, AERO/SMART)
Compatible with CISA
- Chip
- 1K contactless smart card
- Format
- 1K contactless smart card, sector-key based
Avigilon 56-bit (Avig56)
Compatible with Avigilon
- Chip
- T5577 / EM4305
- Format
- 56-bit Avigilon Wiegand: facility code + car…
CAME TST01 (BPT) Proximity
Compatible with CAME S.p.A.
- Chip
- EM4100 / 4200
- Format
- Unique 32-bit ID, RF/64 ASK Manchester encod…
ProdataKey (PDK Red / Standard Fob)
Compatible with ProdataKey
- Chip
- AES-secured 13.56 MHz smart card / T5577
- Format
- PDK Red = an AES-secured 13.56 MHz 8K smart …
Software House (C-CURE / iSTAR, CCOTZ 37-bit)
Compatible with Software House
- Chip
- T5577 / EM4305
- Format
- CCOTZ proprietary 37-bit credential for C-CU…
Brivo (Unified Credential, AES-secured 13.56 MHz smart card LEAF + 37-bit prox)
Compatible with Brivo
- Chip
- AES-secured 13.56 MHz smart card / T5577
- Format
- 56-bit AES-secured 13.56 MHz smart card (LEA…
Jablotron
Compatible with Jablotron
- Chip
- T5577 / EM4305
- Format
- BiPhase; 64-bit Jablotron format, decimal ID…
How it works
From a card you can't replace to a spare in three steps
Identify your format
Read the part number printed on your card, photograph the reader, or send us a sample. Our identify-your-card guide walks you through it.
We confirm compatibility
Tell us the format and quantity. We verify the encoding — frequency, bit structure, facility code — before anything is produced.
Encoded & shipped worldwide
Your credentials are encoded to read on your existing equipment and shipped anywhere, at a fraction of OEM pricing.
Shop by brand
Compatible cards for the systems you run
We encode compatible credentials for every major access-control and lock manufacturer — and dozens of niche ones. Compatible-by-specification only; not affiliated with any of them.
Solutions & knowledge base
Find your credential — or learn the format first
Compatible cards mapped to your application or access-control system, plus plain-spoken deep dives into the obscure proximity formats other vendors won't document.
By application & system
From the format blog
Request a quote
Can't find your format? Email the specialists.
Send the part number printed on your card or a photo of the reader. We confirm compatibility before you order — and we cover specialist and legacy formats too.