Hi all,

In case of full privacy, how does the called party send a subsequent request
 in the same call, such as BYE or re-INVITE?

If the calling party requires privacy=full, in the header fileds in the init
ial INVITE to the called party,
1) From header contains "cryptographically random ID"@"non-identifying name"
2) Contact header contains "cryptographically random ID"@"IP address of call
ing user" 
3) Remote Party ID contains "encripted called party information"@"ID for dec
rypting the information"

Which of them is used in the Req-URI in the subsequent requests from the cal
led party to the calling party?

With the normal procedures in the basic call, the information in the Contact
 in the intiatl INVITE is used.
However, is it possible to route to and identify the correct process within 
the IP address of calling user by "cryptographically random ID"?
In addition, if the information in the Contact is sufficient for subsequent 
messages, why the RPI must contain encripted called party information and ID
 for decrypting the information?

I'm looking forward to your responses and comments.
Thank you.

Regards,
Takumi

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