Answer:
The negative sign is the same as the minus sign, so just use that.
The lack of lock in the browser security status bar indicates that the site is not secure. The danger of proceeding with the transaction is that THE USER IS USING THE WRONG BROWSER TO PERFORM THE TRANSACTION. The site is not secure and all the passwords and other sensitive information that the user is using can easily be copied and used against him.
Methods of gilding include hand application and gluing, typically of gold leaf, chemical gilding, and electroplating, the last also called gold plating. Parcel-gilt (partial gil) objects are only gilded over part of their surfaces.