OSDP stands for Open Supervised Device Protocol. It is a communication interface that connects a
reader with a device it is linked to. It supports two-way communication between a reader and a
controller. This means that a controller, a computer or an interface unit can connect with a reader
and identify a malfunctioning device, manage LED indication or check a PIN-code that was entered.
Its connection is encrypted (OSDP supports high-end AES-128 encryption) and makes it much more
secure than Wiegand and other common protocols.