Three important questions have related solutions:

• Who are you?
• Can you prove that you are who you claim to be? Can we be sure you’re not pretending to be someone?
• Who did this?
• Can we be sure that you, not someone else, produced this?
• Who can read this?
• Can we be sure that no one can read this except the people we want to read it?

• Previous slide
• Next slide
• Back to the first slide
• View Graphic Version