Tamper alarm for electronic lock

A method of operating an electronic lock, comprising:

• receiving a keypad input event via a keypad, wherein upon receipt of a valid keypad input event, a bolt is moved between an extended position and a retracted position;
• detecting a tampering event based at least in part on a characteristic of the keypad input event, wherein the characteristic includes at least one of an input location on the keypad, input duration on the keypad, and an input timestamp, the tampering event being determined to exist by comparing the input duration on the keypad to an acceptable input duration value, wherein the acceptable input duration value is based, at least in part, on a normal use profile created based on analysis of historic keypad input events that indicate patterns during a plurality of authorized actuations of the electronic lock;
• and
• activating a tamper alarm to indicate the tampering event if the input duration on the keypad exceeds the acceptable input duration value.

An electronic lock comprising:

• a latch assembly including a bolt movable between an extended position and a retracted position;
• an exterior assembly including a tamper sensing device;
• and
• a processing unit configured to control movement of the bolt between the extended position and the retracted position responsive to receiving a valid input at a user input device;
• wherein the processing unit is configured to capture an input event;
• and
• wherein, based at least in part on a characteristic of the input event, the processing unit detects and indicates if a tampering event exists, wherein the characteristic includes at least one of an input type, an input location, an input duration, and an input timestamp on the tamper sensing device, the tampering event being determined to exist by comparing the input duration to an acceptable input duration value, the acceptable input duration value based, at least in part, on a normal use profile created based on analysis of historic input events that indicate patterns during a plurality of authorized actuations of the electronic lock.