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Encrypt a file with RSA in .net

I am working on an ecryption module for an app, and I need to be able to encrypt an entire file to send it over the network to the server.

The functionality I am looking for is similar to what gnu pgp provides (or the Windows counterpart, Cryptophane).

Problem I am running into is that RSA appears to only work up to a certain size (and not very big at that).

How would I use RSA to encrypt a 500k or 1mb file?

Worst case scenario, can it be used to encrypt 8192 bytes at a time so I can encrypt the chunks being sent to the server?

Thanks in advance.

Nasir Razzaq

As this tutorial suggests, RSA is recommended for encrypting small amounts of data such as passwords
http://www.dreamincode.net/forums/showtopic67705.htm

Is using some other encryption an option?

DrDamnit

ASKER

Other encryption is definitely an option.

As long as I can encrypt / decrypt using .net, I don't care what the encryption is. (stronger the better obviously!)

DrDamnit

ASKER

oh... I also prefer asymmetric encryption that uses a public and private key pair.

Nasir Razzaq

I have a utility class which i use for encryption/decryption in my projects. I can post the code if you are interested.

DrDamnit

ASKER

Yes. Please do.

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Nasir Razzaq

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