It is only possible by keeping the all game logic at server-side which also stores the score internally without knowledge of the user. For economical and scientific reasons, mankind can not apply this theory to all game types excluding turn-based. For e.g. keeping physics at server-side is computationally expensive and hard to get responsive as speed of hand. Even possible, while playing chess anyone can match AI chess gameplay to opponent. Therefore, better multiplayer games should also contain on-demand creativity.

The way that a new popular arcade mod does it is that it sends data from the flash to php, back to flash (or reloads it), then back to php. This allows you to do anything you want to compare the data as well bypass post data/decryption hacks and the like. One way that it does this is by assigning 2 randomized values from php into the flash (which you cannot grab or see even if running a realtime flash data grabber), using a mathematical formula to add the score with the random values then checking it using the same formula to reverse it to see if the score matches it when it finally goes to the php at the end. These random values are never visible as well as it also times the transaction taking place and if it's any more than a couple seconds then it also flags it as cheating because it assumes you have stopped the send to try to figure out the randomized values or run the numbers through some type of cipher to return possible random values to compare with the score value.

如果你问我，这似乎是一个很好的解决方案，有人认为使用这种方法有什么问题吗?或者可能的解决方法?

我认为最简单的方法是在游戏每次注册一个分数时调用RegisterScore(score)这样的函数，然后对其进行编码、打包并将其作为字符串发送到php脚本。php脚本知道如何正确地解码它。这将停止对php脚本的任何直接调用，因为任何强制得分的尝试都会导致解压错误。

Whenever your highscore system is based on the fact that the Flash application sends unencrpyted/unsigned highscore data via the network, that can be intercepted and manipulated/replayed. The answer follows from that: encrypt (decently!) or cryptographically sign highscore data. This, at least, makes it harder for people to crack your highscore system because they'll need to extract the secret key from your SWF file. Many people will probably give up right there. On the other hand, all it takes is a singly person to extract the key and post it somewhere.

真正的解决方案包括在Flash应用程序和高分数据库之间进行更多的通信，以便后者能够验证给定的分数是否真实。这可能很复杂，这取决于你的游戏类型。

你说的是所谓的“客户信任”问题。因为客户端(在这种现金中，运行在浏览器中的SWF)正在做它设计要做的事情。保存高分。

问题是，你想要确保“保存分数”请求来自你的flash电影，而不是任意的HTTP请求。一种可能的解决方案是在请求时(使用flasm)将服务器生成的令牌编码到SWF中，该令牌必须随请求一起保存高分。一旦服务器保存了该分数，令牌就过期了，不能再用于请求。

这样做的缺点是，用户每次加载flash电影只能提交一个高分——你不得不强迫他们刷新/重新加载SWF，然后他们才能再次播放新的分数。

I made kind of workaround... I had a gave where scores incremented ( you always get +1 score ). First, I started to count from random num (let's say 14 ) and when I display the scores, just showed the scores var minus 14. This was so if the crackers are looking for example for 20, they won't find it ( it will be 34 in the memory ). Second, since I know what the next point should be... I used adobe crypto library, to create the hash of what the next point should be. When I have to increment the scores, I check if the hash of the incremented scores is equal to the hash is should be. If the cracker have changed the points in the memory, the hashes are not equal. I perform some server-side verification and when I got different points from game and from the PHP, I know that cheating were involved. Here is snippet ot my code ( I'm using Adobe Crypto libraty MD5 class and random cryptography salt. callPhp() is my server side validation )

private function addPoint(event:Event = null):void{
            trace("expectedHash: " + expectedHash + "  || new hash: " + MD5.hash( Number(SCORES + POINT).toString() + expectedHashSalt) );
            if(expectedHash == MD5.hash( Number(SCORES + POINT).toString() + expectedHashSalt)){
                SCORES +=POINT;
                callPhp();
                expectedHash = MD5.hash( Number(SCORES + POINT).toString() + expectedHashSalt);
            } else {
                //trace("cheat engine usage");
            }
        }

使用这种技术+ SWF混淆，我能够阻止饼干。此外，当我将分数发送到服务器端时，我使用自己的小型加密/解密功能。类似这样的代码(服务器端代码不包括在内，但你可以看到算法并用PHP编写):

package  {

    import bassta.utils.Hash;

    public class ScoresEncoder {

        private static var ranChars:Array;
        private static var charsTable:Hash;

        public function ScoresEncoder() {

        }

        public static function init():void{

            ranChars = String("qwertyuiopasdfghjklzxcvbnm").split("")

            charsTable = new Hash({
                "0": "x",
                "1": "f",
                "2": "q",
                "3": "z",
                "4": "a",
                "5": "o",
                "6": "n",
                "7": "p",
                "8": "w",
                "9": "y"

            });

        }

        public static function encodeScore(_s:Number):String{

            var _fin:String = "";

            var scores:String = addLeadingZeros(_s);
            for(var i:uint = 0; i< scores.length; i++){
                //trace( scores.charAt(i) + " - > " + charsTable[ scores.charAt(i) ] );
                _fin += charsTable[ scores.charAt(i) ];
            }

            return _fin;

        }

        public static function decodeScore(_s:String):String{

            var _fin:String = "";

            var decoded:String = _s;

            for(var i:uint = 0; i< decoded.length; i++){
                //trace( decoded.charAt(i) + " - > "  + charsTable.getKey( decoded.charAt(i) ) );
                _fin += charsTable.getKey( decoded.charAt(i) );
            }

            return _fin;

        }

        public static function encodeScoreRand(_s:Number):String{
            var _fin:String = "";

            _fin += generateRandomChars(10) + encodeScore(_s) + generateRandomChars(3)

            return _fin;
        }

        public static function decodeScoreRand(_s:String):Number{

            var decodedString:String = _s;
            var decoded:Number;

            decodedString = decodedString.substring(10,13);         
            decodedString = decodeScore(decodedString);

            decoded = Number(decodedString);

            return decoded;
        }

        public static function generateRandomChars(_length:Number):String{

            var newRandChars:String = "";

            for(var i:uint = 0; i< _length; i++){
                newRandChars+= ranChars[ Math.ceil( Math.random()*ranChars.length-1 )];
            }

            return newRandChars;
        }

        private static function addLeadingZeros(_s:Number):String{

            var _fin:String;

            if(_s < 10 ){
                 _fin = "00" + _s.toString();
            }

            if(_s >= 10 && _s < 99 ) {
                 _fin = "0" + _s.toString();
            }

            if(_s >= 100 ) {
                _fin = _s.toString();
            }           

            return _fin;
        }


    }//end
}

然后我把这个变量和其他的假变量一起发送，它就会迷失在其中…对于小型flash游戏来说，这是一项艰巨的任务，但当涉及到奖品时，有些人就会变得贪婪。如果你需要任何帮助，给我写个便条。

欢呼,图标