A portable lock includes a wireless signal receiver. The lock may be unlocked by transmitting a wireless unlock signal from a portable device such as a cellular telephone. Various actuation mechanisms which may include a solenoid, motor or memory wire of a type that contracts when energized are provided in example embodiments. Self-locking embodiments are readily operated with one hand.

A portable lock includes a wireless signal receiver. The lock may be unlocked by transmitting a wireless unlock signal from a portable device such as a cellular telephone. Various actuation mechanisms which may include a solenoid, motor or memory wire of a type that contracts when energized are provided in example embodiments. Self-locking embodiments are readily operated with one hand.

A portable lock includes a wireless signal receiver. The lock may be unlocked by transmitting a wireless unlock signal from a portable device such as a cellular telephone. Various actuation mechanisms which may include a solenoid, motor or memory wire of a type that contracts when energized are provided in example embodiments. Self-locking embodiments are readily operated with one hand.