android - App-server communication protocol -

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i'm building little android app connect server.

my app use simple post send message server, , i'm using google cloud messaging server send message app.

i built registration page, email confirmation , connection page wonder how lock communication between server , app.

this protocol have in mind ( let's take simple exemple of app app message) :

  • app send post infos server self infos (like name , auth_token), destination user , message
  • server search apps belong destination user , use curl forward message gcm
  • gcm send message destination apps

how can server sure name, auth_token etc server receive sender ?

let server generate authentication token when client doing registration , send client. server knows [client - token] mapping.

every time client wants send message, sends authentication token server can , check. client not have send or name, server should know this.

to prevent mitm attacks, use secure connection (https).


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