Encrypt and decrypt URL transfer parameters in the Web system.

Many people on the internet are asking how to implement Web System URL transfer (form submission) parameter encryption. For example: To do a user account editing, to pass the user's id,url as follows: http://localhost/mysystem/editAccounts.aspx?ID=2
But do not want to let others know that the user ID is 2, malicious users may also change 2 to another user ID.
The parameter values passed by encryption can solve the problem.
The following is the base class of DEC encryption and decryption that you wrote.
FileName: Security.CS
Using System;
Using System.Security.Cryptography;
Using System.IO;
Using System.Text;
Namespace EIP. Framework
{
///
A summary description of the security.
The security class implements encryption and decryption under the. NET Framework.
CopyRight kangsoft@hotmail.com@hotmail.com@hotmail.com
///
public class Security
{
String _querystringkey = "ABCDEFGH"; URL Transport parameter Encryption key
String _passwordkey = "HGFEDCBA"; Password encryption key
Public Security ()
{
//
TODO: Add constructor logic here
//
}
///
Encrypted string for URL transmission
///
///
///
public string encryptquerystring (string querystring)
{
Return Encrypt (Querystring,_querystringkey);
}
///
Decrypting a string transmitted by a URL
///
///
///
public string decryptquerystring (string querystring)
{
Return Decrypt (Querystring,_querystringkey);
}
///
Encrypt account password
///
///
///
public string Encryptpassword (string PassWord)
{
Return Encrypt (Password,_passwordkey);
}
///
Decrypt account password
///