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Work in Progress / Serial Code Protection for your games

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Mnemonix
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Posted: 27th Nov 2005 22:01 Edited at: 27th Nov 2005 22:04
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I am working hard to complete a new plugin which will give you the power to protect your applications using serial codes. The serial code system is common in many games and programs. It includes a dialog where you must type the correct serial code to be able to use the program
Here is an example:-



These are some codes generated by the generator. Notice how just changing one character in the name yields a totally different code!.

Each persons EXE is different. When you have the plugin, you use 4 keys to generate codes. Generally 3 of these will be specific to your application and the 4th may be the name of your customer.

The plugin also has the ability to produce a CRC32 checksum string from a file. This is useful for file verification.

This plugin wont be free however. I am thinking of releasing 2 versions. The standard and personalised editions. The difference is that the personalised edition has a totally different generation rule for the codes, and no two personalised plugins will be the same.
Here are the price I am thinking:-

Standard - $15
Personalised - $20

The personalised edition is more secure.

There will be more features in this plugin by the time I release it. If you have any ideas for features then please post them and I will check out how feasible they are to add.

WE SHALL BECOME ALL POWERFUL! CRUSH THE LESSER RACES! CONQUER THE GALAXY! UNIMAGINABLE POWER! UNLIMITED RICE PUDDING ! ! ! ETC. ! ! ! ETC.! ! !
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Cian Rice
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Posted: 27th Nov 2005 22:04 Edited at: 27th Nov 2005 22:04
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OOPS DOUBLE POST

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Cian Rice
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Posted: 27th Nov 2005 22:04
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I definatly will think about buying this... You're releasing so many good apps goddamnit!

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Mnemonix
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Posted: 27th Nov 2005 22:04 Edited at: 27th Nov 2005 22:06
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deja vu.

It goes without saying that purchasers will be entitled to updates as they happen.

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gamesmad
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Posted: 28th Nov 2005 21:53
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Sounding very nice, is $15 a little steep though, might just be me...

Will

Team leader of Games Mad! and 3D designer, modeller and animator for Cyrain Studios.
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Bush Baby
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Posted: 28th Nov 2005 22:30
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hmm... tell me how would each customer's exe be different?
Like is it basically a password encrypted exe?

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Sergey K
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Posted: 28th Nov 2005 23:22
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is that MS-Dos or C++?


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Mnemonix
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Posted: 28th Nov 2005 23:54
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thats C++ running an Dos window on XP. Thats just a test application.
Im not going to describe how the personalised binarys would be different, but rest assured that they will generate COMPLETELY different codes.

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Mnemonix
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Posted: 28th Nov 2005 23:57
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Quote: " Sounding very nice, is $15 a little steep though, might just be me..."


Well if your in England then $15 is what? £8-£9 at the most which is something like the cost of a cheap DVD. I dont think that the price is very unreasonable, especially once it has the extra features im planning.

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Torrey
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Posted: 29th Nov 2005 00:23 Edited at: 29th Nov 2005 00:24
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Can you release an example crackme app with your plugin? It'd be a fun challenge to have a go at how powerful the encryption is.

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Mnemonix
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Posted: 29th Nov 2005 00:33
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Well I dont nessecarily want to do that at the moment, im trying to improve the protection in the application itself, so I dont want to leave it open for cracking.

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jasonhtml
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Posted: 29th Nov 2005 00:48
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one problem... what if too people had the same name

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Mnemonix
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Posted: 29th Nov 2005 01:09
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What do you think the likelyhood of this is?

All you need to do is, if you have a sign up site is say "Sorry that person is already registered" and make them choose a different name.

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Jeku
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Posted: 29th Nov 2005 05:36
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And what would it matter if two people had the same EXE file? If there are 3 John Smiths who registered your product, and they each have the exact same EXE, it's not really a big deal is it?

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Torrey
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Posted: 29th Nov 2005 05:53
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The randomness of your generated keys in the picture up top looks really good, and it's 64-bit protection. If the source uses something like branching (if you know what I mean?) then I think your protection will be really tough if someone were to try and crack it.

If you know assembler pretty well I should show you this one method my friend used for serial protection.

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Mnemonix
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Posted: 29th Nov 2005 15:55
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Here are some example codes that I prepared...

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Mr Crazy
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Posted: 29th Nov 2005 21:00
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I found a flaw. Someone could just copy the exe to someone elses computer and type in the registration code...

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Peter H
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Posted: 29th Nov 2005 21:53
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Or offer it for download along with the code?

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gamesmad
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Posted: 29th Nov 2005 22:24
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Peter_ has a point there...

Will

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Jeku
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Posted: 29th Nov 2005 22:27
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Well no kidding you could do that. There isn't a fool-proof copy protection plan. But who's going to pay for a product then stick it to download on a site? Unfortunately there's no way around it, unless the software "binds" itself to the serial number of your computer's hard drive. But then the real software purchaser would have to re-register if he/she upgrades the hard drive.


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Sillybear
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Posted: 29th Nov 2005 23:10
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could use a Random Code that goes into windows Reg that they have to submit to so they have to use the Name and Code to get a Reg code

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Mnemonix
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Posted: 30th Nov 2005 04:33
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Im also working on two way encryption

This is what I have so far. See if you can find any flaws with it(even though I have no intention of leaving it in its present state).

See if you can work out what it is.

Oh by the way, it took around 14 and a half seconds to encrypt this file, this includes reading and writing.

WE SHALL BECOME ALL POWERFUL! CRUSH THE LESSER RACES! CONQUER THE GALAXY! UNIMAGINABLE POWER! UNLIMITED RICE PUDDING ! ! ! ETC. ! ! ! ETC.! ! !

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Gen
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Posted: 30th Nov 2005 05:43
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Looking good.

Quote: "See if you can work out what it is."


I couldn't

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BearCDPOLD
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Posted: 30th Nov 2005 21:59
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This is great, Mnemonix. Is this going to be a DB only thing, or will there be a way to use with programs written in other languages (all I personally care about is C++)?


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Mnemonix
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Posted: 30th Nov 2005 23:29
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Well I suppose there is the possibility of releasing a dll for c++. Im not sure how this differs from DBP at this point, but its something I will look into

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aristid
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Posted: 3rd Dec 2005 08:08
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use buyers email, they wouldnt want to spread that so easily..

aristides.
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Mnemonix
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Posted: 3rd Dec 2005 20:37
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thats a good idea, but thats up to the particular client who is using the plugin.

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John H
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Posted: 4th Dec 2005 05:44
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Sounds great Andy 20 bucks is cheap too


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