Week 7 Posting - Digital Signatures

We are already passing week 7, over halfway complete. Within Chapter 11 a topic that jumped out to me was the use of Digital Signatures, they are created using private and public cryptographic keys. With the implementation of Digital Signatures it ensures that non-wet signatures can be verified based on a key or token that only the individual should have access to. In the US Department of Defense they issue all military members CAC or common access cards, they have a certificate that is references via a programmable chip on a card. This card is used to gain access to military bases and restricted areas, they are also configured with Active Directory. In AD the user would plug in the card (something that you have) and enter a pin (something that you know) covering two bases of security ensuring multifactor authentication.