The OPENKeypad is a simple keypad box that can be installed at any access point to allow guests entry using a pin code. Unlike traditional keypads, OPENkeypad does not store pin codes on the keypad, but only transmits the pin code to the OPEN servers, where pin codes are authenticated prior to allowing access. This new approach offers property managers an increased pin renewal cycle to reduce risk of sharing, or single usage to reduces unwanted repeat access. Using OPENkeypad technology, a person is sent a unique pin code by SMS which they then type into the keypad to gain access.