Users on a peer-to-peer network, particularly a local subnet or ad hoc wireless network, may publish first contact information to a graph or data store on the network. The first contact information may include a certificate with a public-key and a user identification, such as a peer name. Other users...http://www.google.com.tw/patents/US20070008987?utm_source=gb-gplus-share專利 US20070008987 - Capturing contacts via people near me
