VoIP Security Threats VoIP protocols are vulnerable to attacks –Interruption of Service attacks (Denial of Service, DoS) –Attacks against infrastructures and terminals –Social attacks (SPam over Internet Telephony, SPIT) –Disturbances and interruptions of work by ringing phone for unsolicited calls –Interception and Modification –Conversations may be intercepted (lack of confidentiality) –Private information can be learnt (caller ID, DTMF password/accounts, etc.) –Conversations/signaling may be modified (lack of integrity) –Abuse of Service (Fraud) –Unauthorized or unaccountable resource utilization, fake identity, impersonation, session replay (bank session), etc.
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