Research And Implementation Of A Steganography APP Of Photograghing And Hiding

Images are one of the simplest and most effective ways to record public life.Tablet computers,smart phones and other mobile smart terminals have gradually replaced digital cameras and become the first choice for ordinary people to record their lives.On the one hand,many important photos are stored in the mobile terminals used by journalists,intelligence workers and other special industry workers.On the other hand,in order to save the storage space of mobile terminals,many users will choose to upload photos to the cloud for storage,which will inevitably bring the risk of personal privacy leakage.How to avoid the disclosure of privacy information has become an urgent problem.In order to solve the above problems,the methods of file transfer or encryption scrambling are generally adopted to protect the privacy message.However,these two methods have their own inherent defects,such as the method of file transfer often has serious hysteresis.The encryption and scrambling method will result in a large number of"Mosaic" image files,which does not meet the requirements of many application scenarios.Aimed at the deficiency existing in the above two methods,considering the characteristics of the mobile terminal has a variety of strategies of storage and information security,through the analysis of the inherent advantages of information hiding algorithm,this article on the mobile terminal,designed and implemented a steganographic APP,namely to the hidden in the need for sensitive or privacy objects photographed,the APP can invoke the camera to take pictures of the mobile terminal equipment,at the same time in the photos hidden steganographic algorithm is used to take pictures content,among them,the real-time and steganographic algorithm is embedded in the APP to implement a variety of difficulties.This paper designs and implements a photo APP for taking photos and real-time steganography on the Android system.Its main work is as follows:1.In this paper,the existing information hiding algorithms are studied and analyzed,and several information hiding algorithms that are easy to be implemented in mobile terminals are selected,such as LSB steganographic algorithm based on spatial domain and DCT steganographic algorithm based on transformation domain,and the steganographic capacity is improved to increase the steganographic capacity.2.This paper studied the characteristics and technical support of the operating system of mobile terminals,selected the Android mobile operating system,and introduced the relevant theories and basic knowledge needed to develop apps on the platform of this system.3.Combining the improved information hiding algorithm and the theoretical knowledge of APP development,after analyzing the basis of steganographic algorithm selection,this paper developed a steganographic photo APP on the Android platform,which can take photos and perform real-time steganographic writing of secret images.4.Tested the function and performance of the pat-and-hide steganographic APP.The functions of the steganographic APP were tested from the aspects of photo steganographic and secret image extraction.The performance indexes of the two steganographic algorithms are tested from the aspects of real-time operation and imperceptibility.The test results show that the two steganographic algorithms selected by the APP can be completed within 1 second in the operation of photo steganographic and secret image data extraction,and the performance of the two improved steganographic algorithms in imperceptibility and other aspects indicate that the APP is operable and practical.