November 26, 2006
RFID Trailer Seals
A large UK grocery distributor, Nisa-Today's, is using RFID-enabled resuable electronic seals on their trailers as an increased security measure. The seals, whenever they're closed, record a random four-digit number as well as the date and time. The use of a random number ensures that, should a seal be opened and re-closed, there will be evidence of it. That is, if a trailer comes into the holding yard and the seal is closed, tampering will generate new random numbers, which obviously will not match the initial number stored. Yard operators can retrieve this information via an interrogator at the gatehouse or around the yard.
While there are other companies, such CN Railways, using RFID to manage shipping trailers (train or truck), only a few are likely using electronic seals. Though this is such an innovative use of raadio frequency technology, and the resulting ROI (return on investment) is high enough that we're likely to see more use of such systems.
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