Update README.md

README.md

@@ -46,7 +46,7 @@ echo "Hash is ". ($isValid ? 'valid': 'not valid');
 <h4>Hash generation</h4>
 The hash is generated by:
 
-1. The ```php digest($dataToHash, $algo = 'sha256', $raw_output = false, $separator = '.')``` function takes a string or array as parameter of data to be hashed eg;
+1. The ```digest($dataToHash, $algo = 'sha256', $raw_output = false, $separator = '.')``` function takes a string or array as parameter of data to be hashed eg;
 
 ```php
 <?php
@@ -92,4 +92,10 @@ $hash = '87304e9ab39f1d9c70b9f51f9f3b70fed5d19fbd3917ea3678115c5adffcf0d5';
 2. This function return <code>true</code> if hash is verified, <code>false</code> otherwise
 
 
-1.  you pass the hash and the data from w 
+<h1>Possible applications</h1>
+1. Securing API - This library can be used to generate hash digest plus an ``` API_SECRET ``` (see below) of data to be passed to an API. Remember to also include the generated hash to the data being POSTed so that the API can generate an hash using the data and try and verify against the POSTed hash.
+
+NB: ```API_SECRET``` This is code or a random string known only to the API provider and consumer and is included in the data to be hashed to make the hash more difficult to regenerate.
+
+Happy Coding!
+