自2013年7月以来，人们对密码学上健壮的混淆(以不可区分混淆的形式)重新产生了兴趣，这似乎是由Amit Sahai的原始研究激发的。

Sahai, Garg, Gentry, Halevi, Raykova, Waters，候选人 以及所有电路的功能加密(2013年7月21日)。 Sahai, Waters，《如何使用无区别模糊处理》 可否认加密，以及更多。 Sahai, Barak, Garg, Kalai, Paneth，保护混淆不受代数攻击(2014年2月4日)。

您可以在这篇Quanta Magazine文章和IEEE Spectrum文章中找到一些提炼的信息。

目前，利用这项技术所需的资源数量使其不切实际，但AFAICT的共识是对未来相当乐观。

我这么说很随意，但对于那些习惯于本能地忽视混淆技术的人来说——这是不同的。如果它被证明是真正的工作和实际，这确实是重要的，而不仅仅是为了混淆视听。

很多时候，担心你的产品被逆向工程是多余的。是的，它可以被逆向工程;但它是否会在短时间内变得如此出名，以至于黑客们会发现它值得逆转。它吗?(对于大量的代码行来说，这项工作不是一个小时间活动)。

如果它真的能赚钱，那么你就应该筹集足够的资金，通过专利或版权等合法途径来保护它。

恕我直言，采取你将要采取的基本预防措施，然后释放它。如果它成为逆向工程的一个点，这意味着你已经做得非常好，你自己会找到更好的方法来克服它。祝你好运。

正如很多人已经说过的:在一个普通的CPU上，你不能阻止它们，你只能延迟它们。就像我以前的密码学老师告诉我的那样:你不需要完美的加密，破解密码的代价肯定比获得的代价更大。你的困惑也是一样。

但还有3个注意事项:

It is possible to make reverse engineering impossible, BUT (and this is a very very big but), you cant do it on a conventional cpu. I did also much hardware development, and often FPGA are used. E.g. the Virtex 5 FX have a PowerPC CPU on them, and you can use the APU to implement own CPU opcodes in your hardware. You could use this facility to really decrypt incstuctions for the PowerPC, that is not accessible by the outside or other software, or even execute the command in the hardware. As the FPGA has builtin AES encryption for its configuration bitstream, you could not reverse engineer it (except someone manages to break AES, but then I guess we have other problems...). This ways vendors of hardware IP also protect their work. You speak from protocol. You dont say what kind of protocol it is, but when it is a network protocol you should at least protect it against network sniffing. This can you indeed do by encryption. But if you want to protect the en/decryption from an owner of the software, you are back to the obfuscation. Do make your programm undebuggable/unrunnable. Try to use some kind of detection of debugging and apply it e.g. in some formula oder adding a debug register content to a magic constant. It is much harder if your program looks in debug mode is if it where running normal, but makes a complete wrong computation, operation, or some other. E.g. I know some eco games, that had a really nasty copy-protection (I know you dont want copyprotection, but it is similar): The stolen version altered the mined resources after 30 mins of game play, and suddenly you got just a single resource. The pirate just cracked it (i.e. reverse engineered it) - checked if it run, and volia released it. Such slight behaviour changings are very hard to detect, esp. if they do not appear instantly to detection, but only delayed.

所以最后我想建议: 估算逆向工程人员的收益，将其转化为一些时间(例如，使用最便宜的印度工资)，并进行逆向工程，使时间成本更大。

有人试过codemoth: http://www.sourceformat.com/code-obfuscator.htm吗? 或者Themida: http://www.oreans.com/themida_features.php ?

晚一点看起来更有希望。

我不认为任何代码都是牢不可破的，但奖励必须非常棒，才能让人们愿意尝试它。

话虽如此，你还是应该做以下事情:

Use the highest optimization level possible (reverse engineering is not only about getting the assembly sequence, it is also about understanding the code and porting it into a higher-level language such as C). Highly optimized code can be a b---h to follow. Make structures dense by not having larger data types than necessary. Rearrange structure members between official code releases. Rearranged bit fields in structures are also something you can use. You can check for the presence of certain values which shouldn't be changed (a copyright message is an example). If a byte vector contains "vwxyz" you can have another byte vector containing "abcde" and compare the differences. The function doing it should not be passed pointers to the vectors but use external pointers defined in other modules as (pseudo-C code) "char *p1=&string1[539];" and "char p2=&string2[-11731];". That way there won't be any pointers pointing exactly at the two strings. In the comparison code you then compare for "(p1-539+i)-*(p2+11731+i)==some value". The cracker will think it is safe to change string1 because no one appears to reference it. Bury the test in some unexpected place.

尝试自己破解汇编代码，看看哪些是容易的，哪些是困难的。您可以尝试一些想法，使代码更难进行反向工程，并使调试更加困难。

安布尔说的完全正确。你可以让逆向工程变得更难，但你永远无法阻止它。永远不要相信依赖于防止逆向工程的“安全性”。

That said, the best anti-reverse-engineering techniques that I've seen focused not on obfuscating the code, but instead on breaking the tools that people usually use to understand how code works. Finding creative ways to break disassemblers, debuggers, etc is both likely to be more effective and also more intellectually satisfying than just generating reams of horrible spaghetti code. This does nothing to block a determined attacker, but it does increase the likelihood that J Random Cracker will wander off and work on something easier instead.