Quote Originally Posted by wowiesy View Post
agree that this device can possibly be considered as a tool that can be used for the invasion of privacy... but.. we have to establish muna the technical capabilities of the RFID itself. hanggang gaano kahaba / lawak ba ang range ng RF signal nito? from what I read in the column, ang design is may mga handheld readers that would "read" the RFID just like a handheld scanner reads the bar code of the products you buy off the grocery / mall...

kung limited ang range, it has to be established exactly how long is that range... kapag sobrang lapit, it is quite useless for surveillance purposes...
Taken from: http://www.rfidjournal.com/faq/18/69

[SIZE="4"]What is the read range for a typical RFID tag?[/SIZE]

There really is no such thing as a "typical" RFID tag, and the read range of passive tags depends on many factors: the frequency of operation, the power of the reader, interference from other RF devices and so on. In general, low-frequency tags are read from a foot (0.33 meter) or less. High-frequency tags are read from about three feet (1 meter) and UHF tags are read from 10 to 20 feet. Where longer ranges are needed, such as for tracking railway cars, active tags use batteries to boost read ranges to 300 feet (100 meters) or more.