The invention discloses an Andriod
system-oriented implement method of a mobile secure terminal. The mobile secure terminal comprises an Andriod user registration module, an Andriod
user management module, an Andriod calling module, an SIP signaling
processing module, a key negotiation module, a
server key negotiation module, a voice bridging module, an encrypted conversation module, a
server encrypted conversation module and an SIP
relay module. The implement method supports two encrypted communication
modes: the first one is that one-time pad end-to-end encrypted
voice communication for mobile terminals with Andriod operating systems is achieved while the two parties who communicate with each other are both secure terminals, namely the first mode is an end-to-end encrypted communication mode; the second one is that one-time pad encrypted
voice communication from the mobile terminal with the Andriod
operating system to a
server is achieved while only one of the two parties who communicate with each other is the secure terminal, namely the second mode is a halfway
encryption communication mode from the secure terminal to the server. The implement method of the invention does not need extra hardware to support, and is friendly in
user interface and easy to operate.