How the compatible Brivo Unified Credential (37-bit prox layer) works
The Brivo Unified Credential (37-bit prox layer) is a dual-frequency credential operating on both 125 kHz LF and 13.56 MHz HF, so the compatible part must carry the correct data on whichever band your readers use. Its data structure is 125 kHz 37-bit (H10304-class) prox layer alongside 56-bit DESFire EV3 (LEAF) for legacy reader compatibility. When you present a credential, the reader decodes that exact structure and passes it to your access-control panel as a card number it recognises.
Because the Brivo Unified Credential (37-bit prox layer) is a secured smart credential, it is designed so the encryption keys stay under your control. We supply compatible blank credentials built on the matching Genuine NXP MIFARE DESFire EV3 / T5577 / EM4305 platform, ready for your access-control system or integrator to enrol exactly as it would credentials ordered through the original vendor's channel. You get drop-in spares and bulk stock at a fraction of OEM pricing — and because your own system writes the keys, every credential inherits your site's security.
To order, tell us the part number or format printed on your existing Brivo card, along with your facility code and card-number range, and our specialists confirm the encoding before anything ships. Bulk and reorder quantities are welcome — pricing is a fraction of OEM list, and every credential is verified to read on your existing equipment.
Also known as
Brivo · Brivo OnAir · Brivo Unified Credential · B-BUC3-56-SCP50 · B-BUC3-37-SCP50 · Brivo prox · Brivo 37-bit
Brivo and all other brand and product names are trademarks of their respective owners. Security ID Systems is an independent manufacturer and supplier of compatible access-control credentials and is not affiliated with, authorized by, sponsored by, or endorsed by these companies. Brand and format names are used only to identify the systems our products are compatible with. MIFARE and DESFire are registered trademarks of NXP B.V.