Cript querystring return value potentially dangerous

[Paj]

hi,

this code cript a querystring by Rijndael class:
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RijndaelManaged rjm = new RijndaelManaged();
rjm.KeySize = 128;
rjm.BlockSize = 128;
rjm.Key = ASCIIEncoding.ASCII.GetBytes(c­hiave);
rjm.IV = ASCIIEncoding.ASCII.GetBytes(i­v);
Byte[] input = Encoding.UTF8.GetBytes(S);
Byte[] output = rjm.CreateEncryptor().Transfor­mFinalBlock(input,
0,input.Length);
return Convert.ToBase64String(output)­;
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In one page i have this javascript with cript querystring
''
javascript:window.open('Downlo­adDocumento.aspx?id=hiWQqPNzFs­0ONpwkTsrFCw%3d%3d&est=ohP­sZliSmWSE0hwYNIq7nA%3d%3d .....
''

ASP.NET return this error........................why ?
______________________________­___
Exception Details: System.Web.HttpRequestValidati­onException: A
potentially dangerous Request.QueryString value was


detected from the client (id="...iWQqPNzFs0ONpwkTsrFCw=­=").
______________________________­____

thank you

Paj

 

[Joe Kaplan \(MVP - ADSI\)]

Base64 has a few characters that might still trigger the .NET 1.1 input
validation checker. You should URL encode it before sending it to the user.

Joe K.