Security Aspects With Voip - Mitel 430 System Functions And Features

System interfaces
2. 1. 3. 2

Security aspects with VoIP

Security is an important aspect of VoIP telephony. The table below shows the three se-
curity objectives of data protection, authentication and integrity as well as ways of
achieving those objectives:
Tab. 2 Security objectives
Security objective Meaning
Data Protection Third parties must not be able to read the
exchanged data
Authentication Verifying the identity of the remote station
Integrity Third parties must not be able to modify the
transmitted data
With these considerations it is important to note that the voice data and the signalling
data do not always run in parallel and may well take separate paths, as the following
example shows:
Signalling data
SIP phone
Fig. 15 SIP data streams
38
Communication server
as SIP provider
Voice data
Remedy
Data encryption
Using shared passwords and certificates
Using checksums
Signalling data
SIP phone
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016