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#HOW DO I GET MY STARCRAFT CD KEY FROM AN OLD EMAIL FULL#
#HOW DO I GET MY STARCRAFT CD KEY FROM AN OLD EMAIL VERIFICATION#
#HOW DO I GET MY STARCRAFT CD KEY FROM AN OLD EMAIL CODE#
#HOW DO I GET MY STARCRAFT CD KEY FROM AN OLD EMAIL WINDOWS#

It is however very much security by obscurity.

#HOW DO I GET MY STARCRAFT CD KEY FROM AN OLD EMAIL CODE#

Its a fairly small amount of code which would allow for a huge number of unique and valid keys to be generated The application can then reverse this process (base32 to real number, decrypt, decode the points) and then check each of those points is on our secret graph. We'll encrypt the string with a known and fixed key (horribly weak, but it serves a purpose), then convert the resulting bytes through Base32 to generate the final key

The plotted line can have (if you use a fine enough frequency) thousands of unique points, so you can generate keys by picking random points on that graph and encoding the values in some wayĪs an example, we'll plot this graph, pick four points and encode into a string as "0,-500 100,-300 200,-100 100,600"

I'm not very well versed in mathematics, but it struck me that one way to do this is to use a mathematical function that plots a graph

#HOW DO I GET MY STARCRAFT CD KEY FROM AN OLD EMAIL VERIFICATION#

With offline verification the most difficult thing is ensuring that you can generate a huge number of unique licence keys, and still maintain a strong algorithm that isnt easily compromised (such as a simple check digit) Most of the other answers address online verification, which is significantly easier to handle (most of the logic can be done server side). When I originally wrote this answer it was under an assumption that the question was regarding 'offline' validation of licence keys. Then, when someone enters a playtime-card number, check if it's in the database, and if it is, associate that number with the current user so it can never be used again.įor online services, there is no reason not to use the above scheme using anything else can lead to problems.

Store it in our database and print it on the card.

Generate a very large cryptographically-secure random number.

The CD-key algorithm for World of Warcraft - used, for instance, when buying playtime cards - probably looks something like this: REAL CORRECT WAY TO DO IT:įor online-services, life is a bit simpler, since even with the binary file you need to authenticate with their servers to make any use of it (eg. Of course, no matter what you do, unless you are offering an online service (like World of Warcraft), any type of copy protection is just a stall: unfortunately, if it's any game worth value, someone will break (or at least circumvent) the CD-key algorithm, and all other copyright protections.

#HOW DO I GET MY STARCRAFT CD KEY FROM AN OLD EMAIL FULL#

The full algorithm is rather complex, but outlined nicely in this (completely legal!) paper, published in Germany.

Additionally, it requires online activation. This allowed MS to both verify your key and obtain the product-type (Home, Professional, etc.) at the same time.

#HOW DO I GET MY STARCRAFT CD KEY FROM AN OLD EMAIL WINDOWS#

Windows XP takes quite a bit of information, encrypts it, and puts the letter/number encoding on a sticker. The algorithm for verifying is public, and looks something like this: x = 3

Thus, you could enter anything for the first 12 digits, and guess the 13th (there's only 10 possibilities), leading to the infamous 1234-56789-1234 Starcraft and Half-life both used the same checksum, where the 13th digit verified the first 12. For old-school CD keys, it was just a matter of making up an algorithm for which CD keys (which could be any string) are easy to generate and easy to verify, but the ratio of valid-CD-keys to invalid-CD-keys is so small that randomly guessing CD keys is unlikely to get you a valid one.