资 源 简 介
NearbyFriend lets you become aware of a nearby friend without being bound to a cellphone provider and without any third-party tracking. All that is required is your and your friend"s Android smartphone. NearbyFriend has your smartphone periodically send its current location to your friend"s smartphone, which calculates the current geographic distance between the two devices. Then, the distance information is returned to your smartphone, which will alert you if the two devices are nearby. For privacy protection, your smartphone sends its location in encrypted form to your friend"s smartphone, and the distance computation is performed directly on the encrypted data. In other words, your friend will not be able to learn your location, and your privacy remains protected! To protect your friend"s privacy, our protocol guarantees that you can learn your friend"s location only if your two smartphones are nearby.
http://crysp.uwaterloo.ca/software/nearbyfriend/
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