VoIP Cell Phones : Security concerns and Countermeasures

This paper deals with modern cellular phones that operate on Voice over Internet Protocol, their current development, several Information security risks associated with them and various countermeasures that can be undertaken to prevent data theft/misuse. VoIP is vulnerable to well known traditional modes of attack such as Denial of Service (DoS),Man in the middle (MiTM) etc but also introduces new ones like Toll frauds and ‘Vishing’. Having said that, once we understand the associated risks, with proper planning and checks in place, we can utilize the VoIP network without compromising its security or Quality of Service( QoS).