Patent ID: 8031069

Claim:
A tamper-proof electronic security seal which includes: a. a bolt and a locking element, said bolt having a head and a hollow shank extending therefrom having a longitudinal bore formed therein, said shank being dimensioned to pass through a lock hasp and having a free end formed for locking engagement with said locking element; and b. an electronic seal element formed for mechanical connection to said bolt head, and including: an electrical power source; (ii) a control unit; (iii) communications means responsive to said control unit; and (iv) a sensor adapted for insertion into said longitudinal bore of said shank, and connected to said control unit; wherein, in response to a severing of said shank and said sensor inserted therein, said control unit is operative to activate said communications means to emit an alarm signal; wherein said communications means is ultrasonic communications means adapted to communicate with external ultrasonic communications means associated with a security system at a secured location; and wherein said ultrasonic communications means is adapted to sense mechanical shock, thereby to function also as a means for sensing an attempt to mechanically tamper with said electronic seal element.