Wireless security for freight container seals

A system for securing freight container seals with electronic sensors, comprising:

• a sensor clamp housing;
• one or more sensing portals positioned within the sensor clamp housing, wherein the sensor clamp housing is operable to receive a bolt seal through each of the one or more sensing portals;
• one or more seal sensors proximate to the one or more sensing portals;
• a transmitter configured to transmit an RF signal through the bolt seal as an antenna at a first end of the bolt seal, wherein the one or more seal sensors is configured to detect the RF signal at a second end of the bolt seal opposite the first end;
• a sensor clamp module, within the sensor clamp housing, and operable to activate and interrogate the seal sensors to determine a tamper state of the bolt seal;
• and
• a sensor clamp wireless module, coupled to the sensor clamp module, and operable to communicate the tamper state of the bolt seal wirelessly to a communications gateway.

A system for securing freight container seals with electronic sensors, comprising:

• a bolt shaft having a first end and a second end;
• a sensor clamp housing, wherein the sensor clamp housing is shaped to capture the bolt shaft, wherein the sensor clamp housing includes,
• an immobile seal sensor secured inside the sensor clamp housing, wherein the seal sensor is configured to sense an electro-magnetic property of the bolt shaft,
• a transmitter configured to transmit an RF signal through the bolt shaft as an antenna at the first end of the bolt shaft, wherein the seal sensor is configured to detect the RF signal at the second end of the bolt shaft, and
• a wireless transmitter configured to transmit information based on the electro-magnetic property of the bolt shaft.