Setting an authorization serial number to unlock features in applications

[Mitch]

Would anyone have a routine kicking around that would take a users email
address and convert it into a string of numbers to use as an unlock code?

I am writing an application and would like it to be demo'able but not fully
functional until the unlock code is entered.

thanks in advance!

mitch

 

[Lucas Tam]

Would anyone have a routine kicking around that would take a users
email address and convert it into a string of numbers to use as an
unlock code?

You can probaby use the built in classes to generate an ecrpyted string?

I am writing an application and would like it to be demo'able but not
fully functional until the unlock code is entered.

Just remember to obfuscate your code - it's very easy to decompile .NET
code.

 

[Imran Koradia]

some results of googling on how to encrypt a string in vb.net:
Simple Encryption:
http://www.developer.com/net/vb/article.php/3292781
http://www.dotnetspider.com/Technology/KBPages/611.aspx
Stronger Encryption (RSA):
http://www.devx.com/security/Article/17455/0/page/3
Others:
http://www.devarticles.com/c/a/VB.Net/String-Encryption-With-Visual-Basic-.NET/
http://www.obviex.com/samples/Encryption.aspx

you can encrypt the email address and use the generated key as an unlock
code.

hope that helps..
Imran.