The development of VoIP technology combined with the phone, video conference, SMS and instant messaging technology, resulted in a rapid growth of internet as a communication medium. If telemarketing companies use the IP based VoIP service, then it wil...
The development of VoIP technology combined with the phone, video conference, SMS and instant messaging technology, resulted in a rapid growth of internet as a communication medium. If telemarketing companies use the IP based VoIP service, then it will create SPAM through multicast/broadcast and send the same voicemail to multiple addresses. This dissertation introduces the SIP-VoIP mode which uses the handshake protocol that allows the server and client to authenticate each other prior to the data exchange. It also allows the use of session key to operate the encryption and decryption, and enables HTTP digest authentication through hash function in servers.