ceo chase jamie diamond keeps it short, sometimes down to one word. investor carl icahn rale rarely uses the service and warren buffet relies on an assistant for his messages. >> everything can be exposed publicly and we need the take that security. >> patterson says he's already seen an impact. >> it empowers the people reporting to me to be more than direct. >> few have any doubt at all, don't send an e-mail, come back to it later and then decide, or better yet, have a face-to-face conversation, especially for something confidential. >> but, of course, e-mails seemed leak a private correspondence, can you expect any privacy when you send one and are there steps to protect yourself and your messages? a director at the privacy center, thank you for joining us, good to see you. >> hi, thank you so much for having me. >> when you are going in to type that e-mail, should you assume that anything you write could be exposed? >> yes, i think it's wise for americans to understand their e-mail privacy threatens a variety of strierngs in addition to identity t