Quote from: anarcho47 on March 01, 2012, 04:57 amQuote from: QTC on March 01, 2012, 04:29 amThe original idea of interception detection chips came from a vendor on OVDB. These chips would have RFID UARTs, RAM, ROM/NVRAM, and at a minimum a photoresistor/photovoltaic cell. When a vendor's making their pack, they'd throw this chip under the outermost layer, seal up the package, then program it wirelessly with an integer of their choice which they'd then send to the customer. The chip would use the secret integer and the value of epoch at the current time in combination with some hash algorithm to generate a string with a predictable value which would then be broadcast in response to an interrogation with another preprogrammed secret string (kind of like port knocking). If LE intercepts the package and opens it up, the chip (sensing this via the photoresistor) would wipe the secret integer from its memory, throwing off the value of the string that it's transmitting. When the customer receives the pack via mail or GPS dead drop or whatever, they can simply aim their RFID gun at the pack and send the interrogation string. If the response is an expected value depending on the time of day the pack hasn't been opened, if not the pack has been intercepted and can be either abandoned at the drop or have the delivery refused. You can add stuff like oxygen/NMR/x-ray sensors in addition to the light sensor for maximum measurement intelligence.I should add this probably wouldn't be used for SR as the chip would cost $10 or so to fab plus $20 (?) in parts. It's more for the vendors who vend to the vendors, and are slanging stuff like keys of molly/cocaine as opposed to LSD crystals. ;-)I feel we're really on the brink of using technology and cryptoanarchy to blow the arms race between us and the feds wide open, somebody needs to do this soon so why not me?I would be all over this for overseas bulk shipments...+ 9000 8)