Encrypted and decrypted problem.

 Hi,
for maintain security, i encrypted my password and store in database like following
 Dim PWD As String = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPassword.Text.Trim(), "SHA1").Trim()
but problem is suppose user forget his password and need to know then how can i decrypted the password and send to the user?
is there any other suitable way to handle password?
please help me.
Thanking you.


 
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