Mitel 430 - Security Aspects with Voip

System interfaces
38
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
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
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:
Fig. 15 SIP data streams
Security objective Meaning Remedy
Data Protection Third parties must not be able to read the
exchanged data
Data encryption
Authentication Verifying the identity of the remote station Using shared passwords and certificates
Integrity Third parties must not be able to modify the
transmitted data
Using checksums
Signalling data Signalling data
Communication server
as SIP provider
SIP phone
Voice data
SIP phone