X-I-5 passphrase

Hello guys, in the process of authorization to Playstation Network PS3 sends request to
IV0001-NPXS01001-00.auth.np.ac.playstation.net/nav/auth.

It sends information like

type=0&serviceid=IV0001-NPXS01001_00&loginid=xxxx&password=xxxx&first=true&consoleid=xxxxx

Also in that POST request there is a header that is interested to me , it is X-I-5-Passphrase .

Habib helped me earlier with PS3_C 4.83 version and it was this

X-I-5-Passphrase:...

X-I-5 passphrase