How to encrypt data while redirecting to a new page in asp.net

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I want to redirect from one page to another page in asp.net but at that time data are visible at the address bar.
I want to encrypt that data. Below i am mentioning my code. Please check and give me a solution.
Thanks in advance.

C#

string usr = "XXXX";
string ps = "XXXX";
string sid = "XXXX";
string mobileNos = "123456789";
string det = txtbox2.Text;
Response.Redirect("http://xxx.xxx.com/WebServiceSMS.aspx?User=" + usr + "&passwd=" + ps + "&mobilenumber=" + mobileNos + "&message=" + det + "&sid =" + sid + "&mtype=N");

After debugging this i have found this following code on my address bar:

http://xxx.xxx.com/WebServiceSMS.aspx?User=XXXX&passwd=XXXX&mobilenumber=123456789&message=XXXX&sid%20=XXXX&mtype=N

Posted 22-Sep-11 23:20pm

sahabiswarup

Updated 22-Sep-11 23:26pm

v3

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Om Prakash Pant · Answer 1 · 2011-09-22T23:55:00

You should not pass the sensitive information as a querystring. I can see that you are passing user id, password, mobile number etc.
This is a bad design

You can use one of the options:

1. use a Postback
2. Storing data in sessions
3. storing data in viewstate
4. making use of cookies

If you want encrypt and decrypt, you can use HTTPModule from the following URL:

http://madskristensen.net/post/HttpModule-for-query-string-encryption.aspx

Thiagarajan Duraisamy · Answer 2 · 2011-09-23T00:07:00

C#

byte[] data = new byte[DATA_SIZE];
byte[] result;
SHA512 shaM = new SHA512Managed();
result = shaM.ComputeHash("User");

this wil giv ur SHA512 computed hash value.

take a look at the following to use other function.

http://msdn.microsoft.com/en-us/library/9eat8fht%28v=VS.71%29.aspx[^]

Or try using the session values, so that when redirecting you dont hav to post the values into ur url. Which is simple
simply use it lik

C#

<pre>Session["User"]="xxxx";
Session["ps"]="xxxx";
...
Response.Redirect("http://xxx.xxx.com/WebServiceSMS.aspx");

How to encrypt data while redirecting to a new page in asp.net

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