The threats against VoIP are numerous and seem to be growing, but in 2008 the technology probably won’t suffer crippling attacks. VoIP is susceptible to the many exploits that networks generally are heir to — denial of service, buffer overflows and more. For instance, two protocols widely used in VoIP — H.323 and Inter Asterisk eXchange — have been shown to be vulnerable to sniffing during authentication, which can reveal passwords that later can be used to compromise the voice network.