Securakey Radio Key Compatible Cards: RK600 & RK65K Guide
American Key Cards supplies compatible replacement cards and key tags for Secura Key Radio Key systems, including the RK600, RK600e, RK65K, and RK65KS readers. These are 125 kHz proximity credentials manufactured to the Securakey Radio Key specification — specifically Format 201 (26-bit Wiegand) — and are shipped pre-encoded to your facility code and card number range. American Key Cards is not affiliated with Secura Key or the Assa Abloy group; these are compatible-by-specification aftermarket credentials.
What Is the Securakey Radio Key Format?
The Securakey Radio Key is Secura Key’s proprietary 125 kHz proximity credential line. It uses a passive IC with Dynascan auto-tuning antenna technology, which Secura Key developed to extend read range beyond what standard proximity cards achieve at the same frequency. Despite the proprietary antenna design, the Wiegand data output delivered to the access control panel uses standard industry formats.
Radio Key credentials are available in two primary bit formats:
- Format 201: 26-bit Wiegand output — facility codes 0-255, card numbers 0-65,535. This is the format used by the vast majority of Secura Key installations.
- Format 303: 32-bit Wiegand output — dramatically expanded facility code space for larger or multi-site deployments.
- HID-compatible variants: Some Radio Key credentials are available with
-Hsuffix part numbers, encoding in standard HID 26-bitH10301, 34-bit, or 37-bit formats for use alongside HID Prox readers via theRKDTdual-technology reader.
The RK600 and RK65K readers are configured at installation to expect one specific format. Ordering the wrong format produces cards that present to the reader but deliver an unexpected data structure — the panel will reject the credential.
OEM Part Numbers: Identifying Your Credential
Secura Key’s Radio Key card line uses a structured part number scheme. The OEM credentials you may already have in your system include:
| Part Number | Description |
|---|---|
RKCM-01 | Radio Key standard clamshell card, Format 201 (26-bit) |
RKCM-02 | Radio Key standard clamshell card, Format 303 (32-bit) |
RKKT-01 | Radio Key key tag / fob, Format 201 (26-bit) |
RKKT-02 | Radio Key key tag / fob, Format 303 (32-bit) |
RKCI-01 | Radio Key ISO card (credit-card form factor), Format 201 |
RKCI-02 | Radio Key ISO card, Format 303 |
RKCIH-02 | Radio Key ISO card, HID-compatible encoding |
RKKT02-SA | Radio Key key tag, Format 303, standalone programming |
If the part number on your existing cards ends in -01, your system uses Format 201 (26-bit). If it ends in -02, your system uses Format 303 (32-bit). This single detail determines which compatible card you need to order.
Our Securakey Radio Key format reference page has additional detail on reader configuration and encoding variants.
How to Identify a Secura Key System
Look for the Secura Key brand name or model designations on the reader housing: RK600, RK600e, RK65K, RK65KS, or RKDT. On existing cards, the OEM part number beginning with RKCM, RKKT, or RKCI confirms a Radio Key credential. If your reader model is RKDT — Secura Key’s dual-technology reader — confirm with your installer which format is currently enrolled, since the RKDT accepts both Radio Key and HID 26-bit credentials simultaneously.
Can Securakey Radio Key Cards Be Cloned?
Yes. Format 201 and Format 303 credentials operate at 125 kHz without any cryptographic layer — the facility code and card number are broadcast unencrypted. A Proxmark3 can read the data, and a T5577 blank can emulate it.
What American Key Cards does is different: we produce compatible credentials from the facility code and card number you provide, exactly as the OEM would. Our cards are not clones of existing cards — they are independently manufactured credentials encoded to the specification you supply. This is standard practice for aftermarket proximity card suppliers and appropriate for legitimate credential management.
If clone resistance is a requirement, evaluate Secura Key’s MIFARE multi-technology credentials or a different platform. Standard 125 kHz proximity, including Radio Key, is not designed to resist duplication by someone with physical card access.
Compatible Readers and Distribution
AKC’s Format 201 (26-bit) compatible cards and key tags work on all Secura Key RK600, RK600e, RK65K, and RK65KS readers, the RKDT dual-technology reader, and any Wiegand 26-bit panel when Format 201 output is used. Format 303 (32-bit) cards require readers and panels specifically configured for 32-bit Wiegand data.
Secura Key distributes its credentials through an authorized dealer network, which means routine reorders involve dealer margins and minimum quantities. American Key Cards supplies compatible clamshell cards and key tags directly, in any quantity, without a dealer account.
Securakey vs. Standard 26-Bit: What Is and Is Not Interchangeable
A common question from facilities teams is whether a standard 26-bit HID ProxCard or a generic 125 kHz card will work in a Secura Key reader. The short answer is no — and here is why.
| Credential | Air Interface | Output Format | Works in RK600? |
|---|---|---|---|
| Secura Key Radio Key (Format 201) | Secura Key proprietary | 26-bit Wiegand | Yes |
HID ProxCard II (H10301) | HID FSK | 26-bit Wiegand | No |
| AWID 26-bit | AWID proprietary | 26-bit Wiegand | No |
| Generic T5577 clone of Radio Key | T5577 emulation | 26-bit Wiegand | Yes (if encoded correctly) |
Even though the Wiegand data output from all of the above is identical at the panel level, the card-to-reader communication uses a proprietary RF encoding specific to each manufacturer. Secura Key readers decode only the Secura Key air interface. This is why format-matched cards are required — not just any 26-bit credential will work.
For related context on the same principle applied to other brands, see our guides on AWID 26-bit compatible cards and Indala FlexPass 26-bit cards.
Ordering Compatible Securakey Radio Key Credentials
To place an order, you need three pieces of information:
- Format: Format 201 (26-bit) or Format 303 (32-bit). Check your existing card part numbers or installer documentation.
- Facility code: The site code programmed into your Secura Key system. This is printed on existing card labels or available from your installer’s records.
- Card number range: The specific card numbers you want assigned to new credentials, or a quantity from where your existing sequence left off.
AKC supplies both clamshell card and key tag form factors compatible with Radio Key Format 201. Our cards ship ready to present to your RK600 or RK65K reader without additional programming on-site.
Why Non-OEM Securakey Cards Cost Less
The price difference between OEM Secura Key credentials and compatible aftermarket cards comes down to distribution overhead, not hardware. The 125 kHz IC in a Radio Key card is a standard passive component; OEM pricing reflects the dealer chain and brand premium layered on top of it. There is no technical performance difference between an OEM RKCM-01 and a compatible card encoded to the same facility code and card number in Format 201 — both present identical data to the reader.
To order compatible Securakey Radio Key cards or key tags for your RK600, RK600e, RK65K, or RK65KS system, contact American Key Cards with your facility code, format, and quantity. We will confirm compatibility and provide a quote, typically within one business day.
Frequently asked questions
What is the difference between Securakey Format 201 and Format 303?
Format 201 is the 26-bit Wiegand version of the Securakey Radio Key credential, supporting facility codes 0-255 and up to 65,535 card numbers per facility code — the same structure used by standard 26-bit Wiegand systems across the industry. Format 303 is the 32-bit Wiegand version, which dramatically expands the available facility code space and is used in larger or multi-site Secura Key deployments. You need to match the format your existing system was configured for; check your current cards or installer documentation to confirm.
Will American Key Cards' compatible cards work on my RK600 or RK65K reader?
Yes. Our Radio Key-compatible clamshell cards and key tags are encoded in Format 201 (26-bit Wiegand) and work on all Secura Key RK600, RK600e, RK65K, and RK65KS readers. You provide your facility code and card number range at ordering and we ship cards ready to enroll in your system.
Can Securakey Radio Key cards be cloned?
Standard Securakey Radio Key credentials operate at 125 kHz with no cryptographic protection. The card data — facility code and card number — is readable and reproducible using commercially available RFID tools such as a Proxmark3 with T5577 blank cards. This is the same security level as most standard 125 kHz proximity formats. For environments requiring clone-resistant credentials, Secura Key offers MIFARE-based multi-technology cards, which are a different and more secure product line.
What information do I need to order Securakey-compatible replacement cards?
You need your facility code and the card number range you want programmed. Your facility code should be printed on the label of an existing working card, documented in your installer's records, or readable from the access control panel software. If you are unsure whether your system uses Format 201 (26-bit) or Format 303 (32-bit), contact us — we can help you identify the correct format before you order.
