Worth of Security in VoIP: VoIP, for long, has been termed as a cheap and unsecure mode of communication whereby the voice packets are traversed through public internet. There is control over the packets flow and hence highly unsecure. Unsecure communication never gets its due commit serious business environment and hence VoIP is never treated as a genuine secure way of conversation about sensitive matters.
Along with プライバシー を 守る , this is another main reason for hindrance in VoIP growth among serious enterprises and someone. Possible Solutions: There are prominent solutions to this security problem: First is VPN Tunneling being implemented in client side devices plus client side PC softphones and Mobile Softphones. Second, and the rarely present, solution is “Encryption/Decryption” of VoIP packets. VPN Tunneling Explained: The client creates a dedicated secure connection with the server and then start sending data through this secure dedicated channel.
The protocol followed between client and server can be a declared and known protocol like with OpenVPN, Microsoft PPTP etc. Encryption/Decryption Explained: The client encrypts the data (both signaling and RTP) before sending them over internet. The encryption of info is done through a proprietary logic and algorithm that is only recognized to the developer of the encryption/decryption. The data then is sent to the server where the same algorithm is used to decrypt the data and sent it across towards the SIP server.
Benefits and Disadvantages of Encryption/Decryption over Tunneling: Since, tunneling uses standard protocol hence it can be detected by any software. Because of easy detection the tunnel can be blocked or stopped any kind of time level. As VPN tunneling is invoked by independent programs, most of the times, many PC firewalls do not detect and authorize this. Some VPNs tunneling enabled softphones use more than one protocols such as pptp and most one ports are secondhand. These ports are most of the times blocked by ADSL routers.