| With the rapid development of the Internet,more and more people are using Android phones,and the applications software in the market are gradually enriched.There is a special case that traditional software can not meet.The user needs to obtain the data in a hidden condition,and securely transmit the encrypted data to another device for storage.For this special circumstance,a hidden forensics system is required.This thesis presents a security-enhanced data hiding and forwarding system based on Android ROM-level.The system is divided into different modules for the design,the ultimate realization of the entire system is achieved through the module merge.This thesis study security-enhanced data hiding and forwarding system based on Android ROM-level from three aspects.First of all,the needs of the work under special circumstances are analyzed,and the features according to demand are designed.The system needs to implement the functional requirements and non-functional requirements.At the same time the system is divided into client and server,describing the corresponding function of the two ends.Using special operations to take special photos,video and audio by client,the system will store the data in hidden partitions.The client can periodically connect Wi-Fi hotspots opened by the server and enable the file sending service to send the data from hidden partitions.The server can automatically turn on the Wi-Fi hotspot and open the file receiving service to receive the data sent by the client,and write them to the hidden partition.Then,taking the different functions of client and server into account,the two devices are divided into multiple modules and each module should complete some specific functions.At the same time,in order to facilitate the cooperation among different modules,a control module is designed to manage the communication between the modules.The functions of modules are called by receiving the information of other modules,and the control module can control the whole process.According to the above requirements,the functional modules are divided to implemented.Finally,the system is tested by installing package to the real machine.The system functions are tested,and the ability of the system to deal with anomalies,transmission rates is also tested.The results show that the security-enhanced data hiding and forwarding system based on android ROM-level designed in this thesis works well and can meet the requirements in special circumstances. |
