How can I encrypt a querystring in asp.net?

Question

I need to encrypt and decrypt a querystring in ASP.NET.

The querystring might look something like this:

http://www.mysite.com/report.aspx?id=

Answer 1

I can't give you a turn key solution off the top of my head, but you should avoid TripleDES since it is not as secure as other encryption methods.

If I were doing it, I'd just take the entire URL (domain and querystring) as a URI object, encrypt it with one of the built-in .NET libraries and supply it as the crypt object. When I need to decrypt it, do so, then create a new URI object, which will let you get everything back out of the original querystring.