Help needed to encrypt QueryString

I have created a website that utilises query strings to display data as the user navigates among the pages. I would like to encrypt the query string so that the user does not see the actual value of the query string.

I have been searching online for a solution but no success.

Please reply with working code so that i may encrypt all the query strings in my website.

This is the code i am using now to navigate between pages.

Response.Redirect("EditRequest.aspx?RequestID=" + Server.HtmlEncode(GridView1.SelectedDataKey.Value.ToString()));

Thank You.

5/4/2009 5:18:46 PM 27051 articles. 1 followers. Follow

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You can also use Sessions to transfer data as they are secure than querystrings

and if you want to encrypt querystrings refer here

MAKMark as Answer if this reply helps you
ASP.Net Hosting : Host DepotMy Site : ASPSnippets
5/4/2009 6:03:07 PM

You could use a Base64 conversion so you can encrypt/decrypt the querystring values easily (and someone with little knowledge too).

Take a look at the Convert.ToBase64String and Convert.FromBase64String methods to accomplish the task.

Check this link:

I wouldn't use this method if I really wanted to hide the information in the querystring.

Hope this helps

If this post is useful to you, please mark it as answer.
5/4/2009 6:03:39 PM

I have deceided to use a secure query string. The links were helpful. Thank you.

I am however getting an error message on my destionation page that the input string is not in the correct format. Please see below for the code snippets. I am using the query string to access  a users' data in a gridview. Please reply with your suggestion(s).


void GridView1_SelectedIndexChanged(object sender, EventArgs e)


string encrypt = EncryptClass.encryptQueryString(GridView1.SelectedDataKey.Value.ToString());

Response.Redirect("EditRequest.aspx?RequestID=" + Server.HtmlEncode(encrypt.ToString()));



protected void Page_Load(object sender, EventArgs e)


string decrypt = Request.QueryString["RequestID"];

decrypt = decrypt.Replace(" ", "+");

decrypt = EncryptClass.decryptQueryString(decrypt);



5/4/2009 8:43:56 PM

Hi All,

Thank you for your help. I have solved the problem by reading the above and visiting this link. It works.


5/4/2009 9:40:59 PM

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