To provide a method for handling user identity and privacy, while taking network reliability into account.
The disclosed method includes the steps of: determining whether Transport Layer Security (TLS) is supported in a hop to a next SIP proxy, when a first SIP proxy is about to transfer a SIP request to the next SIP proxy; establishing a TLS connection, when TLS is supported; requesting a certificate; receiving the certificate; verifying the certificate and reliability of the network of the next SIP proxy; and retaining identity information, when the certificate and the trustworthiness of the network is verified. When TLS is not supported, or when the certificate is not verified, or when the trustworthiness of the network is not verified, the identity information is removed, and the SIP request is through the TLS connection.
GARCIA-MARTIN MIGUEL A
NIEMI VALTTERI
HAUKKA TAO
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