VoIP provider Skype claims its security is foolproof, with its 256-bit AES encryption, stronger even than the industry standard 128-bit encryption used by banks for Automated Teller Machines. Other clients, such as Google’s GTalk are also touted to have adequate security to prevent eavesdropping. But is VoIP really secure against potential eavesdropping?

Well, in a nutshell, no. As easy as it is to claim that end-to-end security is assured, this is only applicable to conversations done within a VoIP network, and not extending through other networks or relays.

For instance, if a Skype caller uses SkypeOut to contact a landline, then the call is automatically insecure by current standards. Since regular landline calls go through analog networks, it’s quite easy to tap into the line, either from the telecom company’s base station, or through the cables running to the office or residence being called.

Also, VoIP companies do cooperate with the authorities, given the appropriate legal documentation. So if a judge signs an order to tap your VoIP account, then the encryption is effectively disregarded, since your provider itself can give access to the authorities to tap your account.

But for the general public who’s not engaged in any criminal or dubious activity, then there is no need to worry. Unless you’re really the paranoid type, then you shouldn’t be worried about your calls being tapped when calling over the Internet.