Android Open Source

  Android Java The application layout extracts the encryption key from the Internet radio bitstream using an algorithm that can be repeated and give the same result in another instance of the application. XOR encrypts text, sends SMS to itself, receives SMS and decodes text. Contains all modules for a real application that encrypts text of any length with a Vernam code (restrictions on SMS). Independently receives the same keys (cipher pads) without a synchronization channel. https://github.com/vallshmeleff/radiorandgentwo Vernam Entropy

  Android JAVA    The prototype of two methods - for dividing large text into fragments before RSA encryption and for assembling text from fragments after decoding. It is necessary to check and optimize the Java code. https://github.com/vallshmeleff/sqliteandrsa/blob/main/MainActivity_Fragment_Defragment.java Android JAVA

  Android JAVA How many tasks should a programmer who develops an Android application, for example, for a courier, solve? 1. Database 2. Client-Server module 3. Database synchronization 4. Export/Import database 5 Load Images 6. Using the clipboard 7. Send/receive SMS   8. Load Google Maps and determination of coordinates (use GPS)   We will write a ready-made application (template), on the basis of which you can create a commercial application in a few hours. I can write such a project myself, but it will take more time and there will be less creative ideas - more simple programming. It is interesting to invite European programmers to work on an open source project. Maybe students. The project is easily divided into classes. Accordingly, you can distribute the development of individual classes. At some stage, the project can be positioned as a commercial one.     https://github.com/vallshmeleff   Android JAVA      

  Java RSA A repository has been created that contains JAVA source codes for working with asymmetric RSA encryption. A special Java class has been created. It is shown how to generate encryption keys, encode and decode text, save and restore keys (for exchange, reuse). Tested on API 29  Then we use this JAVA code in the SQLite database for encryption. GitHUB Repository  https://github.com/vallshmeleff/androidrsa    Android JAVA