利用js可以对前台数据加密，以防止被恶意获取，以下代码，用base64对数据进行加密，可以在后台进行解密。
引入的js
<script type="text/javascript" src="jquery.min.js"></script><script type="text/javascript" src="jquery.base64.js"></script>
html中的数据
姓名：<input type="text" id="name" ?><br/> 密码：<input type="password" id="password" ><br/><button onclick="submitData()">提交</button>
js处理
<script> ???function submitData(){ ???????????????var obj = new Object(); ???????obj.name = $(‘#name‘).val(); ???????obj.password= $(‘#password‘).val(); ???????????????//转换为json之后加密 ???????var str = $.base64.encode(JSON.stringify(obj)); ???????$.post("你的url地址", ????????{ ????????????data: str ????????}, ??????????function(data){ ????????????console.log(data); ??????????}); ???} ???//扩展base64，支持中文 ???jQuery.base64 = (function($) { ???????// private property ???????var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; ???????// private method for UTF-8 encoding ???????function utf8Encode(string) { ???????????string = string.replace(/\r\n/g,"\n"); ???????????var utftext = ""; ???????????for (var n = 0; n < string.length; n++) { ???????????????var c = string.charCodeAt(n); ???????????????if (c < 128) { ???????????????????utftext += String.fromCharCode(c); ???????????????} ???????????????else if((c > 127) && (c < 2048)) { ???????????????????utftext += String.fromCharCode((c >> 6) | 192); ???????????????????utftext += String.fromCharCode((c & 63) | 128); ???????????????} ???????????????else { ???????????????????utftext += String.fromCharCode((c >> 12) | 224); ???????????????????utftext += String.fromCharCode(((c >> 6) & 63) | 128); ???????????????????utftext += String.fromCharCode((c & 63) | 128); ???????????????} ???????????} ???????????return utftext; ???????} ???????function encode(input) { ???????????var output = ""; ???????????var chr1, chr2, chr3, enc1, enc2, enc3, enc4; ???????????var i = 0; ???????????input = utf8Encode(input); ???????????while (i < input.length) { ???????????????chr1 = input.charCodeAt(i++); ???????????????chr2 = input.charCodeAt(i++); ???????????????chr3 = input.charCodeAt(i++); ???????????????enc1 = chr1 >> 2; ???????????????enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); ???????????????enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); ???????????????enc4 = chr3 & 63; ???????????????if (isNaN(chr2)) { ???????????????????enc3 = enc4 = 64; ???????????????} else if (isNaN(chr3)) { ???????????????????enc4 = 64; ???????????????} ???????????????output = output + ???????????????????keyStr.charAt(enc1) + keyStr.charAt(enc2) + ???????????????????keyStr.charAt(enc3) + keyStr.charAt(enc4); ???????????} ???????????return output; ???????} ???????return { ???????????encode: function (str) { ???????????????return encode(str); ???????????} ???????}; ???}(jQuery)); ???</script>使用js对form表单base64加密
原文地址：http://www.cnblogs.com/jjkang/p/7896500.html