Secure Communication by utilizing Virtual Private Network
ABSTRACT
Nowadays, communication is not safe especially voice call because of the competitor and other threat that intended to steal the confidential information by wiretapping or intercepted the network line. To solve this problem, a technology called Private Branch Exchange (PBX) and Virtual Private Network (VPN) is used. Private Branch Exchange (PBX) is a server that used for communication purposes. It acts to provide voice call system that utilizes office network through IP-phone while Virtual Private Network (VPN) is a method to avoid data from intercepted by intruders. It is used to encapsulate the data over the VPN tunnel. In this paper, we propose an architectural solution to implement Secure Communication over Virtual Private Network (VPN) technology in industry environment between Headquarters and branches for the business purposes. It is intended to deliver confidential information between headquarters and branches by using phone call that connected in local area network (LAN) with safe. Private Branch Exchange (PBX) is a server that used for communication purposes. Based on the finding result, voice over VPN can be safer when all data that through the VPN tunnel were encrypted. By using this VPN connection, the data transferring process will be less risk.
Keywords : VPN, Private Branch Exchange, IP-Phone |
INTRODUCTION |
FRAMEWORK |
This study concerned about security issue of the voice call and focused towards creating the prototype of secure communication by utilizing virtual private network tunnel within the branch and headquarters network. Type of communication focused on this project is regarding voice calls. Voice call will be applied within the VPN tunnel using voice over internet protocol. The call utilize the line from VPN tunnel connection direct from the branch to the headquarter office without having to go through the third party like telco network in a term to ensure that every detail of information that spoken are safe. Before and later, voice call is one way to exchange information in a long range. The information could be confidential or vice versa. In general context, that just normal action in daily life. However, for the corporate company that emphasizes confidentiality of information, using voice call for exchange the confidential information is not safe. It is because, each voice call need to go through the third party like telco network. The network is not encrypted, and in another word, the line is not secure and easily can be intercepted by intruders who intentionally to steal the information by hearing the conversation. Virtual Private Network (VPN) is a technique used to add the extra level of security and privacy to networks. Virtual Private Network (VPN) are most often used to protect sensitive data. It provides protection to your network connection to assure that all of the data you're sending and receiving is encoded and secured from intruders. For corporate used, Virtual Private Network (VPN) technology was initially created to allow the branch to safely connect to corporate networks without worried about data intercepting to communicate with headquarter office. Generally, all internet traffic passes through ISP’s servers and can be viewed by internet service provider (ISP) and hacked by someone with intentionally. With VPN technology the branch and headquarter office communicate over the secret encrypted connection sometimes referred as "VPN tunnel" via VPN server. This means that all data traveling between network and the VPN server is encrypted so that only you and the VPN server can “see” it. The voice call will be implemented by using voice over internet protocol (VOIP) and utilize VPN tunnel since VPN is one of the secure network connection. All voice call in the network will use VPN tunnel without need to go through the third-party network, and at the same time, the information is safe. OBJECTIVE
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TECHNIQUES
VPN (Virtual Private Network) technology provides a way of protecting information being transmitted over the Internet. Techniques use in vpn is like below:
each remote client.PPTP allows a PPP session, with non-TCP/IP protocols (e.g.IP, IPX or NetBEUI), to be tunnelled through an IP network.
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RESULT
Sniffing tools cannot sniff data over VPN.
CONCLUSION
The voice call was safe by utilize the VPN tunneling method. Every voice call data that through VPN were encrypted by encryption and needed to be decrypted first to hearing the conversation. Vpn is a method that can be used to secure data transmission within local area networks.