Android Secure messaging APP

Looking for a simple Android communication app to be developed, it's a basic app for a very small project, but with some intense features, The project can be divided into 4 phases to be marked, all work need to be carried by one person or one Organisation, 1, Development 2, Complete documentation (very important part) 3, Getting up and running 4, Explanation and support for any questions post completion. APP description. OTR system Off the record messaging protocol is an interesting solution for secure communication. From one side, the protocol provides confidentiality and authentication of the messages, giving the parties the possibility to deny the authorship of the messages (so-called Deniable authenticated key exchanges). This property makes it extremely attractive from an anonymity point of view and also very different from the typical cryptographically protected communication. The app should comprise of the following tasks: 1. Introduction to Off the record messaging protocol 2. Functional analysis of security features provided 3. Project and implementation of OTR messaging application 4. Demonstration of protocol’s security features including key management and the deniability feature. more detail update can be provided during the communication phase, Some key details to mention, I am a DEVops Engineer, I am technical enough to carry this task out with some help, but I have time constraints hence not taking this on, I will provide all the details and will be in touch continuously, I have a time frame of 7 days for this to be completed. I have existing project files (started by a developer but was not able to finish due to his health reason, I can provide them binaries, you can sort that or dev a new one from scratches. Please remember Documentation is a Key part of this project. this project will only be up for maximum of 6 months time, i.e used for 6 months time.