How secure is VoIP, Voice over Internet Protocol ?

Most of us come across a lot of VoIP applications each day. Most of the articles that we publish here only speak about VoIP. VoIP is gaining popularity worldwide. With the rapid penetration and increasing awareness amongst users, VoIP is the buzz word these days. But how secure is VoIP? Can I transmit data over VoIP securely?The answer is not really. Since VoIP is an internet-based service, you