There is a server (php), and there is a client (application on android), a request is sent from the client to the server, the server gives the answer in json format.
Anyone who wants can send the gett request and see the json data.
The question of encrypting this data. That is, you need to encrypt them in php, and decrypt them on the client.
A request is sent from the client to the server, the server sends encrypted data in json format, and the client decrypts it.
Please tell me how to implement this encryption?