Encrypt / Decrypt Between Android and PHP and vice-versa
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MCrypt mcrypt = new MCrypt();
/* Encrypt */
String encrypted = MCrypt.bytesToHex( mcrypt.encrypt("Text to Encrypt") );
/* Decrypt */
String decrypted = new String( mcrypt.decrypt( encrypted ) );
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$mcrypt = new MCrypt();
/* Encrypt */
$encrypted = $mcrypt->encrypt("Text to encrypt");
/* Decrypt */
$decrypted = $mcrypt->decrypt($encrypted);