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copied!<p>Try the following simple example. I used it only to encrypt a password but you could use it for the whole form as well.</p> <p>It is using a open source javascript library <a href="https://ziyan.info/2008/10/javascript-rsa/" rel="nofollow">https://github.com/ziyan/javascript-rsa</a></p> <p>HTML/JAVASCRIPT:</p> <pre><code><script language="JavaScript" type="text/javascript" src="jsbn.js"></script> <script language="JavaScript" type="text/javascript" src="rsa.js"></script> <script language="JavaScript"> function encryptData(){ //Don't forget to escape the lines: var pem="-----BEGIN PUBLIC KEY-----\ MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDfmlc2EgrdhvakQApmLCDOgP0n\ NERInBheMh7J/r5aU8PUAIpGXET/8+kOGI1dSYjoux80AuHvkWp1EeHfMwC/SZ9t\ 6rF4sYqV5Lj9t32ELbh2VNbE/7QEVZnXRi5GdhozBZtS1gJHM2/Q+iToyh5dfTaA\ U8bTnLEPMNC1h3qcUQIDAQAB\ -----END PUBLIC KEY-----"; var key = RSA.getPublicKey(pem); element=document.getElementById('password'); element.value=RSA.encrypt(element.value, key); } </script> <form method='POST' id='txtAuth' onsubmit='encryptData()'> <input type='text' name='username'/> <input type='password' name='password' id='password' placeholder="password"/> <input name='submit' type='submit' value='Submit'> </form> </code></pre> <p>PHP:</p> <pre><code><?php if (isset($_POST['password'])) { //Load private key: $private = "-----BEGIN RSA PRIVATE KEY----- MIICXAIBAAKBgQDfmlc2EgrdhvakQApmLCDOgP0nNERInBheMh7J/r5aU8PUAIpG XET/8+kOGI1dSYjoux80AuHvkWp1EeHfMwC/SZ9t6rF4sYqV5Lj9t32ELbh2VNbE /7QEVZnXRi5GdhozBZtS1gJHM2/Q+iToyh5dfTaAU8bTnLEPMNC1h3qcUQIDAQAB AoGAcbh6UFqewgnpGKIlZ89bpAsANVckv1T8I7QT6qGvyBrABut7Z8t3oEE5r1yX UPGcOtkoRniM1h276ex9VtoGr09sUn7duoLiEsp8aip7p7SB3X6XXWJ9K733co6C dpXotfO0zMnv8l3O9h4pHrrBkmWDBEKbUeuE9Zz7uy6mFAECQQDygylLjzX+2rvm FYd5ejSaLEeK17AiuT29LNPRHWLu6a0zl923299FCyHLasFgbeuLRCW0LMCs2SKE Y+cIWMSRAkEA7AnzWjby8j8efjvUwIWh/L5YJyWlSgYKlR0zdgKxxUy9+i1MGRkn m81NLYza4JLvb8/qjUtvw92Zcppxb7E7wQJAIuQWC+X12c30nLzaOfMIIGpgfKxd jhFivZX2f66frkn2fmbKIorCy7c3TIH2gn4uFmJenlaV/ghbe/q3oa7L0QJAFP19 ipRAXpKGX6tqbAR2N0emBzUt0btfzYrfPKtYq7b7XfgRQFogT5aeOmLARCBM8qCG tzHyKnTWZH6ff9M/AQJBAIToUPachXPhDyOpDBcBliRNsowZcw4Yln8CnLqgS9H5 Ya8iBJilFm2UlcXfpUOk9bhBTbgFp+Bv6BZ2Alag7pY= -----END RSA PRIVATE KEY-----"; if (!$privateKey = openssl_pkey_get_private($private)) die('Loading Private Key failed'); //Decrypt $decrypted_text = ""; if (!openssl_private_decrypt(base64_decode($_POST['password']), $decrypted_text, $privateKey)) die('Failed to decrypt data'); //Decrypted :) var_dump($decrypted_text); //Free key openssl_free_key($privateKey); } ?> </code></pre> <p>Enjoy!</p>

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