[Users] Please Help Me

Bogdan-Andrei Iancu bogdan at voice-system.ro
Thu Nov 10 14:00:24 CET 2005

Hi Ferianto,

your question require large answers, so I will try to give you just some 


Ferianto monster wrote:

> I am a college student in Polithecnic Caltex of Riau in Indonesia. I 
> am in the third years now. In my last project, I want to build the 
> VOIP with TLS system at my college because i think it is interesting. 
> I have studied about it since one month , but i get many problems to 
> undestand about the system. Here is some obstacles questions about the 
> system that i have met:
> 1. How can the attacker eavesdrop the communication in VoIP (The way)?

you can find a lot of info about this on the net - try googling.

> 2. How can TLS prevent the attacker to eavesdrop the communication?

by encrypting the signalling

> 3. How can TLS ensure the confidentially and integrity of 
> communication? Why we don`t user other secure protocol?

again, by encryption.

> 4.Do all TLS` clients use Linux Operating System or they can use Windows?

any OS

> 5. How secure TLS to protect the communication?

TLS protects only the signalling part - for media (audio steam) you need 
different mechanism like SRTP.

> That is all the obstacles questions that i have met. I do hope any 
> body can help me to answer those question. Please help me. Thank you 
> very much.
> Sincerely yours,
> Ferianto
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