Balancing Security, Performance and Deployability in Encrypted Search

Encryption is an important tool for protecting data, especially data stored in the cloud. However, standard encryption techniques prevent efficient search. Searchable encryption attempts to solve this issue, protecting the data while still providing search functionality. Retaining the ability to search comes at a cost of security, performance and/or utility. An important practical aspect of utility is compatibility with legacy systems. Unfortunately, the efficient searchable encryption constructions that are compatible with these systems have been proven vulnerable to attack, even against weaker adversary models. The goal of this work is to address this security problem inherent with efficient, legacy compatible constructions. First, we present attacks on previous constructions that are compatible with legacy systems, demonstrating their vulnerability. Then we present two new searchable encryption constructions. The first, weakly randomized encryption, provides superior security to prior easily deployable constructions, while providing similar ease of deployment and query performance nearly identical to unencrypted databases. The second construction, EDDiES, provides much stronger security at the expense of a slight regression on performance. These constructions show that it is possible to achieve a better balance of security and performance with the utility constraints that come with deployment in legacy systems

CyberPDX: An Interdisciplinary Professional Development Program for Middle and High School Teachers

CyberPDX is an annual professional development program hosted at Portland State University. Our long-term goal is to broaden participation in cybersecurity. Since 2016, over 70 middle and high school teachers from the Pacific Northwest have participated in the STREAM program, which offers interdisciplinary instruction in programming, cryptography, personal security, policy, literature, and arts. In this poster, we share our interdisciplinary curriculum, present data on short-term impacts, and describe our in-progress work to evaluate the program’s longer term impacts