![]() ![]() 37-bit encoding with Facility code and ID codeĪlthough it is possible to decipher the type of encoding used via the Card Swipe Wizard, it is best to contact your HID vendor to determine the encoding type used on your proximity cards.The second part (possibly the entire string if there is no facility code) of the binary string-on the right-is the encoded ID code. ![]() The first part - on the left - can be the facility code if your site uses one. Between these parity bits is a string of binary digits. The encoding is comprised of a beginning and end parity bit. Generally, the encoding types used are either 26 or 37-bits, or in the case of some corporate cards, 35-bits. ![]() HID uses a proprietary encoding format to encode data (ID or facility code and ID) on proximity cards.
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