Way back in June this year I discussed that intelligence agencies cannot tap VoIP calls and hence allowing criminals to easily misuse the service. Such incidents are increasing day by day and one has been recently reported in Switzerland.
According to Swiss Info, the investigators are concerned due to the increasing use of Skype by criminals in the anti-social activities. They have found out a number of drug-related cases where Skype has been used for VoIP calls.
The problem with the investigators is that they cannot tap Skype calls since the calls are encrypted in nature.
The intelligence agencies can monitor phone calls made over traditional phones or mobile phones. It is very difficult to tap VoIP calls. They may know that the calls have been made over internet, but can not recognize who said what and to whom. It is the biggest drawback of VoIP, which needs to be tackled.
