How to Generate Registration Key (for Security)

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Dear Sir, I want to Generate a Registration Key on the Basis ofProcessor ID.
I require code to generate any string corresponding to Processor ID:BFEBFBFF0001067A

Posted 17-Aug-11 0:41am

LebneizTech

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Simon Bang Terkildsen · Accepted Answer · 2011-08-17T00:46:00

Solution 1

I'm not entirely sure what you want to do, but I would think you could just calculate a hash of your processor id string, like so:

C#

SHA512 sha = new SHA512Managed();
byte[] hash = sha.ComputeHash(Encoding.UTF8.GetBytes(myProcessorIdAsString));
StringBuilder sb = new StringBuilder(128);
foreach (byte b in hash)
    sb.Append(b.ToString("X2"));
string meKey = sb.ToString();

Posted 17-Aug-11 0:46am

Simon Bang Terkildsen

Updated 17-Aug-11 0:47am

v2

Comments

LebneizTech 17-Aug-11 7:25am

Thanks,
As I want to create a Registration Key(like:57057056807005675680583479268168406684684 or any other Format) to verify the Authentication, corresponding to ProcessorID(BFEBFBFF0001067A)

As You have provide the Code : How I use the line(SHA512 sha = new SHA512Managed();),means what is the Refrence for it.

Simon Bang Terkildsen 17-Aug-11 7:30am

SHA512Managed
it's located in the System.Security.Cryptography namespace.

LebneizTech 17-Aug-11 7:53am

Thank you,
It is working,I can use it.But it is too long.Can you suggest string like : BFEBFBFF0001067A => 57057056807005675680583479268168406684684

Simon Bang Terkildsen 17-Aug-11 8:07am

you can use SHA256 a = new SHA256Managed(); it'll produce a sring of half the size (64 characters)
or MD5 md5 = MD5.Create(); which will produce a 32 character long string

LebneizTech 17-Aug-11 8:24am

Thank you, Working Fine.
Can you help further to generate a KEY independant to PC,so that I can Authenticate through Internet YEARLY to a Client(means a key for a CLIENT yearly).

Simon Bang Terkildsen 17-Aug-11 8:29am

I'm afraid I wont be much help with that, I'm never used licenses in my software, and it doesn't have my interrest so I have no prior knowledge of it.
I could ofcourse easely put something together put it would proporbly be easy to circumvent, so I'll not even try. I know my limits, well mostly :)

#realJSOP · Accepted Answer · 2011-08-17T01:17:00

Solution 2

Tying an application to a processor is a bad idea. If someone paid for your software, they should be able to install it on any machine they own. What you should do is implement an online registration verification system. This allows you to a) track who's using your software, and b) allow the user to have N number of installs.

Posted 17-Aug-11 1:17am

#realJSOP

Comments

LebneizTech 17-Aug-11 7:20am

How can I Implement it.Means what is code for it ?

Simon Bang Terkildsen 17-Aug-11 7:37am

That really depends on your target audience. If your target audience is the privat citizen then you're correct, but if it's a business entity then internet access might not be present.
I don't like the idea of restricting, something you've paid for, to a single computer either though.