Question: Guardian Travel provides emergency assistance to travelers who need help with last- minute travel changes, rebooking flights, ground transportation, and emergency medical services. They are now considering expanding into personalized concierge services to aid travelers with restaurant reservations, tickets to shows, and spa reservations. Guardian Travel would like to create a specialized smartphone app to support their concierge services. One of the contract programmers working on the app has told Guardian Travel that a code signing digital certificate is a waste of money, but one of Guardian Travel's IT staff members says that it is essential. After hearing the discussion in a meeting an executive vice president has asked for LCPS for their help in reviewing all the digital certificates that Guardian Travel uses and how they are currently being managed. Guardian Travel has asked you to conduct a training session to the executive staff and IT personnel about digital certificates

1. Create a PowerPoint presentation that provides an overview of cryptography with specific emphasis on digital signatures, digital certificates, and PKI. The presentation should be at least eight slides in length.

2. The security manager of Guardian Travel has now proposed that all email correspondence, both internal between employees and external to all business partners and customers, should use digital certificates. Several IT staff employees are concerned about this proposal. They have asked you for your opinion on using digital certificates for all email messages. Write a one-page memo to Guardian Travel about the pros and cons of this approach.