Change Key Password Dialog Box
This dialog box changes the password for the Personal Information Exchange (.pfx) key file used to sign the assembly.
To access this dialog box, select a project node in Solution Explorer, then on the Project menu, click Properties. When the Project Designer appears, click the Signing tab. On the Signing page, select Sign the assembly, and select (or create) a .pfx file from the Choose a strong name key file drop-down list; then click the Change Password button.
Enter the current password for the key file.
Enter a new password of at least 6 characters in length. The password information is stored in your computer's cryptographic storage database.
Retype new password
Reenter the characters you typed for New password to confirm.