My company had its annual user conference a month or so ago, with about 600 guests. One of the speakers, Per Hellqvist, is a Swedish security specialist from Symantec, and one of the issues he mentioned were the risks of passports with RFID chips.
He pointed out, and I agree, that RFID chips can be read without the knowledge of the owner, and from a certain distance. It would for instance, be possible and quite easy to plant a car bomb which is triggered by the proximity of a person who carries a passport with a certain nationality code. It would be equally easy to simply copy the information off the RFID chip and put it on another passport. Remember, digital information that can be read can also be copied.
Most concerning, however, from the perspective of the average citizen, is that the movements of ordinary citizens can be tracked without their knowledge. Already, laws are in place (in Sweden) that allows this based on such weak suspicions such as "went to school with a suspected criminal" or "often shops in the same grocery store as a suspected criminal". That's scary.
If they start with RFID-equipped passports in Sweden, I will give mine a few seconds on full power in the microwave, just to make sure it's not going to get copied.
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