Abstract
Voice over Internet Protocol is a technology that use internet to make and receive telephone calls, voice is been turned into digital data packets that is been transmitted over the Internet. VoIP providers permit you to call anywhere at a flat rate for a fixed number of minutes, Call charges remain low over any distance. Economical, the simplicity is the properties that make maximum subscribers for VoIP Phone Service over conventional modes. At this paper, we make a center of attention on attacks that happen in VoIP, Here the attacks are happen by traffic analysis in the packet delivery phase. Two important contributions that are made. By means of the shortest route for routing voice flow makes the network at risk to flow based traffic analysis attack, as a contribution we derive new timing attack. Then, we develop a realistic technique to achieve experimental, customizable k-anonymity and randomness on voice over internet protocol networks. It provides solution for new timing attack with protected VoIP, thereby improving the quality of voice in VoIP.