Radio frequency transponder stored value system employing a...

Details Radio frequency transponder stored value system employing a... Radio frequency transponder stored value system employing a...

H - Electricity

04

L

H04L 9/30 (2006.01) G07F 7/08 (2006.01) G07F 7/10 (2006.01) H04B 1/59 (2006.01)

Patent

CA 2182464

An encryption method and stored value system comprising a host computer, a reader/writer that communicates with the host computer, and an RF transponder that communicates with the reader/writer. The transponder comprises a transponder chip having a memory with a plurality of memory sections, which encryption method protects data stored in the memory. The method provides a secure way to increase and decrease the value stored in the transponder and to selectively write data to and from the transponder.

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