• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Authenticate Workbooks

The unfortunate reality of exchanging files over networks, especially over the Internet, is that you need to be sure you know where the files you’re working with came from. One way an organization can guard against files with viruses or substitute data is to authenticate every workbook using a digital signature. A digital signature is a value, created by combining a user’s unique secret digital signature file mathematically with the contents of the workbook, that programs such as Excel can recognize and use to verify the identity of the user who signed the file. A good analog for a digital signature is a wax seal, which was used for thousands of years to verify the integrity and origin of a document.


Note

The technical details of and procedure for managing digital certificates are beyond the scope of this book, but your network administrator should be able to create a digital certificate for you. You can also directly purchase a digital signature from a third party, which can usually be renewed annually for a small fee. For the purposes of this book, you’ll use the selfcert.exe Office accessory program to generate a certificate with which to perform the exercise at the end of the chapter. This type of certificate is useful for certifying a document on your own computer but is not a valid certificate to verify yourself to others across your network or on the Internet.



PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint