Design And Implementation Of Digital Watermark Encryption For Android System Based On

In the era of smart phone universally being used, Android telephone offers many good multi-media entertainment functions, among which the function of voice, photography and video are more important, and they are also the functions that much more used by the customers. In recent years, as the multi-media processing technology has fast developed and with the Internet becoming more and more popularized, it gets easier to get multi-media data, copy, edit and publish for Android telephones, but on the other hand, it also brings us some side effects while it brings about convenience. Some lawbreakers can copy or change the data and contents at random. Therefore, the identification of Android data and contents has become a problem urgently needed to be worked out. Digital Watermarking Technology will be the most effective and the most promising technology to solve this kind of problem.This thesis has analyzed the safety of Android telephone multi-media data and has made a general and secure design for Android telephone multi-media data. Based on Android system, the design adopted Digital Watermarking Technology based on DCT; the design completed Android safe recording software and Android photography software. In the daily use of Android users, this technology can on one hand provides more multi-media services, and on the other hand better guarantees the multi-media safety of Android uses. The main work of this thesis is as follows:(1) Analyzing the demand of Android system Digital Watermarking software with code; introducing operating environment of systematic software; according to the demand, analyzing on the basis of knowing about the systematic software demand function, respectively making a general design for Android safe recording software and Android photography software.(2) Researching and analyzing three key technologies used in Android systematic Digital Watermarking software with code based on DCT. Firstly introducing Android system and its developing technology; Android platform is the operating platform of systematic software, and the application developing technology of this platform is, however, the technological base of implementing systematic software. Digital Watermarking Technology is through the whole process of designing and developing systematic software. At last DCT technology introduced is the key technology that realizes Digital Watermarking software with code.(3) Having stated the process of how to implement the coding of Android system Digital Watermarking software with code; this systematic software can be divided into Android telephone recording software and Android photography software; Android telephone recording software can be implemented respectively from three modules, which are recording function module, watermarking function module and file list module; Android telephone photography software can be implemented respectively from five modules as photography preview module, camera setting module, photo processing module, photo saving module and file managing module.