| 摘要 |
There is provided a peer-to-peer telephone system (10) comprising a plurality of end-users (20, 30) and a communication structure (80) through which one or more end-users (20, 30) are couplable for communication purposes. The system (10) is distinguished in that: (a) the communication structure (80) is substantially de-centralized with regard to communication route switching therein for connecting said one or more end-users (20, 30); (b) said one or more end-users (20, 30) are operable to establish their own communication routes through the structure (80) based on exchange of one or more authorisation certificates, namely User Identity Certificates (UIC), to acquire access to the structure (80); and (c) said structure (80) includes an administration arrangement (100) for issuing said one or more certificates to said one or more end-users (20, 30).
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