title: Send post data in url and secure it
body: <p>I want To send some information in an url, but how can i encrypt this on an safe way? </p>
  
  <p>This is my url for example:
  <a href="http://www.domain.com/process/?var=1&amp;variable=2" rel="nofollow">http://www.domain.com/process/?var=1&amp;variable=2</a></p>
  
  <p>If an user knows the url he can change the variabeles, and that's not the intention. </p>
  
  <p>I must encrypt it, and decrypt it on the server i think. But what is an good and safe way to do this?</p>
  
  <p>Edit with more info</p>
  
  <p>What I want to archive is that my phone App (IOS in this case) communicates with my web app (which is the main) by using an API. The URL could look like this
  <a href="http://www.website.com/api/my_secret_key/get/users" rel="nofollow">http://www.website.com/api/my_secret_key/get/users</a>, it will respond with json
  Also values needed to be set by the app, for example: <a href="http://www.website.com/api/my_secret_key/set/user/score/100" rel="nofollow">http://www.website.com/api/my_secret_key/set/user/score/100</a></p>
  
  <p>However with above URL adjusting values is easy BUT unwanted. How can this be done using a safe method.</p>