Reach reliable decision by using secret agreement method

Traditionally, it is very important to deliver data secretly and at low cost in a distributed environment. Using a reliable method to assist in communicating with each other needs to be discussed. Thus, we propose the two-phase agreement (TPA) protocol to solve those problems by verifying the received messages and achieve the agreement. The TPA protocol will assist the organization in achieving agreement and generate a common key to verify it. Similarly, there are many faults and attacks in the network, such as interruption, interception, modification and fabrication. The messages from a source might be changed. However we can use the TPA protocol to remove these faulty influences. The proposed TPA protocol doesn't only decrease the complexity of messages but also increases the capability of fault tolerance. Similarly, it is more reliable via the secret key in a real distributed system. This protocol can solve the agreement problem in net-meeting between arbitrary processors, like sub-company communication with the main-company or makes a decision in the company conference.