SESSION CONTROL SERVER, COMMUNICATION DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD, AND PROGRAM AND RECORDING MEDIUM FOR THE SAME
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United States of America Patent
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Issued Date -
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app pub date -
Oct 3, 2008
filing date -
Jun 19, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A communication device, connected via a network so as to be able to communicate with a session control server, and which establishes a session with another communication device by performing signal transmission to and reception from the session control server, includes: a unit which generates an asymmetric key pair; a request unit which requests certificate issuance for a public key in the asymmetric key pair; a receiving unit which receives notification of public key issuance completion from the session control server; a storage unit which stores a public key certificate which has been received; a sending unit which sends a location registration request of a communication device to the session control server; and a receiving unit which receives a location registration completed notification which includes a term of validity from the session control server; and which sends a location registration request and a certificate issuance request as a combined request.
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