We are looking for Secure Mobile Communication Suite (SMCS)
Install software on both side and use encryption to make direct calls (user id) and private and public key with iemi + time of install +etc so even key stolen nothen happen to decrecry. each mobile have own private key
voice will be not intercepted . see this [login to view URL]
we need for any one OS (android, IOS) if u can do both its good but bid for 1 OS android or IOS first
I have 4 years of experience in iOS application development as well as good understanding of encryption standards such as RSA, AES, DES and TEA. I have already worked on an application-specific hardware equipment similar to the application you need. I can offer quick delivery with reliable and robust application.