| 摘要 |
<p>To facilitate an offeror making sensible offers to offerees based on locations visited by offerees, position data from a positioning device, such as a GPS or other positioning device, is digitally signed or encrypted, and provided to an offeror. The offeror may then validate the digitally signed or encrypted position data before extending an offer based thereon. To facilitate digital signing or encryption of position data, an encryption key may be embedded within a positioning device by a manufacture of the positioning device. Various trust models may be employed between the manufacturer, offeror and offerees.</p> |
