FIELD: information technology.;SUBSTANCE: in the method of registering a participant of a community, a community service server, an authentication server and a plurality of portable terminals are connected over a network. The community service server provides a community service. The authentication server determines whether a participant has the right to use services provided by the community service server and portable terminals can directly communicate with each other. The identification terminal obtained from the portable terminal of the invited party is transmitted together with a registration request through the portable terminal of the inviting party to the authentication server; an account for the invited party is created in the authentication server in response to the registration request; said account is sent to the portable terminal of the inviting party from the authentication server; and said account is sent from the portable terminal of the inviting party to the portable terminal of the invited party.;EFFECT: high security of information sent over a network from user terminals to a community service server.;12 cl, 11 dwg
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