Publications

Carrington, Charles L.; Walkup, Elizabeth W.; Mandeville, Jonathan J.

Abstract not provided.

Proceedings - IEEE Military Communications Conference MILCOM

Mitchell, Robert; Walkup, Elizabeth W.

Sophisticated cyber attacks by state-sponsored and criminal actors continue to plague government and industrial infrastructure. Intuitively, partitioning cyber systems into survivable, intrusion tolerant compartments is a good idea. This prevents witting and unwitting insiders from moving laterally and reaching back to their command and control (C2) servers. However, there is a lack of artifacts that can predict the effectiveness of this approach in a realistic setting. We extend earlier work by relaxing simplifying assumptions and providing a new attacker-facing metric. In this article, we propose new closed-form mathematical models and a discrete time simulation to predict three critical statistics: probability of compromise, probability of external host compromise and probability of reachback. The results of our new artifacts agree with one another and with previous work, which suggests they are internally valid and a viable method to evaluate the effectiveness of cyber zone defense.

Walkup, Elizabeth W.

Passwords are an ubiquitous, established part of the Internet today, but they are also a huge security headache. Single sign-on, OAuth, and password managers are some of the solutions to this problem. OAuth is a new, popular method that allows people to use large, common authentication providers for many web applications. However, it comes at the expense of some privacy: OAuth makes users easy to track across websites, applications, and devices. Password managers put the power in the hands of the users, but this vulnerability survey reveals that you have to be extremely careful which program you choose. All in all, password managers are the solution of choice for home users and small organizations, but large companies will probably want to invest in their own SSO solutions.

Walkup, Elizabeth W.; Kaplan, Moshe K.; Dwyer, Patrick M.; Grosse, Robert G.; Wilkens, Colt W.; Van Der Woude, Joel M.; Hietala, Kesha H.

Abstract not provided.

Walkup, Elizabeth W.; Jensen, Evan P.

Abstract not provided.

Pendleton, Brian P.; Walkup, Elizabeth W.; Birmingham, Ryan M.

Abstract not provided.