how to crack irdeto 2 encryption methods color

This is how you'd break a typical caesar-shift cipher. In this case, you've got data to analyse. Each of the two participants in an encrypted conversation have perfect security of their algorithm implementation. Let us assume for a moment that the algorithm is totally unknown. So you only need one of your implementations to be exposed to an attacker and it is game over again.Įdit: Ok, in response to the OP's updated question. After all, the key is different for each user (actually, this is not a requirement, but, let's just assume it is for simplicity) but the algorithm remains unchanged. The problem with secret algorithms is that they're much more likely to be stolen.

Now, you might ask 'can't I just keep the algorithm secret? That'll work, right?' Oh Dave, plz stop. Deciding to eschew all the testing and design work cryptographers have done for him for free over the years, he writes something involving the odd xor, compiles his program and helpfully gives it to friends.

Dave, the home brew cryptographer, wants to include an encryption algorithm in his program. This, it turns out, is less of an assumption and more of the practical case in use. If there are any weaknesses, they'll find them. On this basis, you must assume that your algorithim can be read by the attacker. The bit you must guard with your life and hope nobody is going to hit you with a hammer until you tell them what it is. However, you're missing the core, fundamental most integrally important central pillar key to the universe that holds cryptography together. Got a clue what that means? Absolutely not. Please answer this question on the assumption that the algorithm is kept completely secret, despite of how difficult that is to achieve in real life.Īlso, assume that I have no access at all to the algorithm, only to the resulting data.ĩ78 2 2 gold badges 9 9 silver badges 16 16 bronze badges 8 Answers How would one hack a file produced by such an algorithm without knowing it in advance?Įdit: Everybody, please don't try to convince me of how hard it is to keep an algorithm secret. (Or any other such mathematical manipulation, this is just an example.) Do a bitwise-negative on any byte whose serial number in the file has a repeated digit sum which is prime.Use a weak well-known encryption algorithm on the original data, then:.It would be a seemingly meaningless string of characters.įor example, say that the home-brew algorithm is like this: How would I crack it? I wouldn't even know where to begin. It makes sense to me that a home-brew algorithm is a very bad idea, but there's one thing I'm not understanding.Īssume I'm an attacker, and I am faced with an weak-but-unknown encryption algorithm developed by 'Dave'. (Actually hashing algorithm rather than encryption, but my question applies to both.)

It shows a weak home-brew algorithm developed by 'Dave', and the answers discuss why this is a bad idea.

How to crack irdeto 2 encryption methods color