webapi-How to Implement Interface encryption

Method One

Add an access token.
For example, your API address is http://www.example.com/api.php
The parameters to be accepted are a,b,c three
Then you can add a validation token (generated by the contract key encryption).

For example
$a = 1;
$b = 2;
$c = 3;
$key = ' abcdef ';

$token =sha1 ($a. $b. $c. $key);

Then access using HTTP://WWW.EXAMPLE.COM/API.PHP?A=1&B=2&C=3&TOKEN=XXXX
api.php the A,b,c,token parameter is received, the SHA1 ($a. $c. $key) is calculated according to the a,b,c and the agreed key, and no permission is returned if the same token is received or if the same is returned.

webapi-How to Implement Interface encryption