Security considerations for voice over ip systems recommendations of the national institute of standards and technology iii c o m p u t e r s e c u r i t y computer security division information technology laboratory national institute of standards and technology gaithersburg md 20899 8930 january 2005 us department of commerce. Voice over internet protocol voip refers to the transmission of speech across data style networks this form of transmission is conceptually superior to conventional circuit switched communication in many ways however a plethora of security issues are associated with still evolving voip technology. Voice over internet protocol voip refers to the transmission of speech across data style networks this form of transmission is conceptually superior to conventional circuit switched communication in many ways however a plethora of security issues are associated with still evolving voip technology this publication introduces voip its security challenges and potential countermeasures for . Security considerations for voice over ip systems recommendations of the national institute of standards and technology national institute of standards and technology 9781494787592 books amazonca. Voice over ip the transmission of voice over packet switched ip networks is one of the most important emerging trends in telecommunications as with many new technologies voip introduces both security risks and opportunities voip has a very different architecture than traditional