today said that confidential mode, which can help protect sensitive information from unauthorized access, is available via the mobile Gmail app. Users will need to enable confidential mode when composing an email. Emails sent via confidential mode can be revoked at any time, or set to expire after a specific period. People who receive confidential emails won't be able to forward, copy, print, or download them. Google points out that confidential mode cannot stop people from taking screen shots of confidential emails. The updated mobile Gmail app is being distributed via the Google Play Store over the next few days.