The query is regarding generating and using a set of asymmetric keys in Vb.net 2010

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hello all,

I am new to cryptography and need you urgent help.

* I want to generate a set of asymmetric keys based on a password.
* Use Private key to encrypt a string to cipher text
* Use public key in my program to decrypt the cipher text from a text file
* Use the decryped information to give rights to users of my application.

Please suggest the wayout with example of commands, if possible.

I have tried searching on net and in books but no success.

Thanks in advance.

Posted 9-Apr-14 6:34am

atul sharma 5126

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[no name] 9-Apr-14 12:38pm

You found nothing? http://www.bing.com/search?q=vb.net+asymmetric+keys

atul sharma 5126 9-Apr-14 12:55pm

Thanks for immediate response.

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Sergey Alexandrovich Kryukov · Answer 1 · 2014-04-09T08:37:00

All the ideas are explained here: http://en.wikipedia.org/wiki/Public-key_cryptography[^]. Please read very carefully.

As you want to make the decryption key public, your data can be decrypted by anyone. So, what's the use? Here is what it is: it can be used to protect the source document from faking using the digital signature schemes: http://en.wikipedia.org/wiki/Digital_signature[^].

In turn, digital signatures can be use in digital certificates: http://en.wikipedia.org/wiki/Digital_certificate[^].

With .NET FCL, a lot of encryption stuff is already implemented for you. As you are interested in asymmetric algorithms (and public-key cryptography) in particular, you can start here: http://msdn.microsoft.com/en-us/library/system.security.cryptography.asymmetricalgorithm%28v=vs.110%29.aspx[^].

—SA