What algorithm or library should be used to encrypt data?

Question

PHP

As a thesis, I am writing a small project on Windows Phone (C #) and Android (Java), using PHP as a backend. The bottom line is to encrypt the data transmitted between the server and the application, preferably using a private key. Advise which algorithm and / or library is better to use for these purposes, since I did not find anything cross-platform with intelligible documentation.

Answer 1

Decided to use AES. Thanks to vilgeforce for the tip! I'll try RNCryptor as a library

Answer 2

To protect traffic from interception, TLS / SSL was invented. And asymmetric cryptography is also there :-) If you want, you can write your own implementation.

Answer 3

Why do you need to encrypt it? A well-built system should not be encrypted. Even Vkontakte sends login, PASSWORD is open. Only it generates a hashcode of the type for the identity of the login request and there on the server it creates the same code, compares them if they are equal, then logs in.

Answer 4

If you already want to encrypt with your hands, I recommend RSA. A bunch of implementations in all languages. High speed and reliability.