thanks, i was under the impression that RFID had a much larger range (about a foot @ minimum), from another FAQ:
What is the read range for a typical RFID tag? The read range of passive tags depends on many factors: the frequency of operation, the power of the reader, interference from metal objects or other RF devices. In general, low-frequency tags are read from a foot or less. High frequency tags are read from about three feet 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 or more. this is based on the 3 ranges (low - 125khz, high - 13mhz, ultra-high - 900mhz) i know of ... so they can technically be that close-range in custom applications? if it's that low @ such a close range what is the point of RFID @ all in a payment process like that (vs. swiping a card)? - jon ----- Original Message ----- From: "rwf" <[EMAIL PROTECTED]> To: "jon baer" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Tuesday, November 18, 2003 10:33 PM Subject: Re: [nycwireless] [ot] RFID payment stuff ... > From their FAQ: > > Typically, your PayPass card must be within a few centimeters (1 inch) of > the PayPass reader to be read. > Also, two cards cannot simultaneously communicate account information to a > PayPass reader > > Jon wrote: > Begin Quoted Text > > >what i cant seem to get around is if its a wireless solution to payment what > >happens when a card not involved with a payment happens to brush by or be in > >proximity with a reader - do they also get charged without knowing? has > >anyone seen the technology first hand? > > -- NYCwireless - http://www.nycwireless.net/ Un/Subscribe: http://lists.nycwireless.net/mailman/listinfo/nycwireless/ Archives: http://lists.nycwireless.net/pipermail/nycwireless/
