How will you ensure that information remains confidential?

This is a very broad question. Please edit the question so that it is more specific -- what sort of information do you wish to keep confidential?

Another Answer

Information remains confidential if you tell no one, never write it down and never think about it so that it could slip out of your mouth. Otherwise all information is subject to breach of confidentiality.

Confidentiality agreements may serve to protect certain kinds of communication and its information, but these agreements can be breached.

Electronic information will never be totally confidential, since once the details become concretized in electronic characters, they are subject to discovery and revelation.