Hi:
I am now trying to implement the SIP TLS transportation. Since I am new to this field, I wish someone can give me any advice.
As I know, SIP client should send its certificate to the Authentication Server to get the key for encrypting the SIP messages. Who will bw the Authentication Server? The SIP proxy server? Or a third party server is needed? To protect the certificate, the SIP client need a 'shared secret' between it and the server. How does the 'shared secret' be set? Manually configuration or through public key exchange?
By the way, does anyone know any document describing the call flow or operation of the SIP transportation using TLS?
Thanks.
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