VoIP Security
Brazilian songwriter Chico Science used to say that “one step forward and you’re not at the same place anymore”. Unfortunately, this new place is not always the ideal world we longed to be. This is the reality that many companies are delving into the Voice over IP land are facing. Problems with security are many and, once again are driven by the usual expectation for panaceas; companies are making decisions today that will bring far too many headaches come the future.As Bruce Schneier realized, VoIP Security is not only about encryption. As happened with internet banking we won't achieve our security targets if we care only about SIP and encryption.
More can be found here in a shor article about voip security.