Cloud services have revolutionized modern computing. The benefits of outsourcing data and
computation come with security and privacy concerns. This monograph explores the …

Efficient, leakage-free search on encrypted data has remained an unsolved problem for the
last two decades; efficient schemes are vulnerable to leakage-abuse attacks, and schemes …

Data-sharing systems are often used to store sensitive data. Both academia and industry
have proposed numerous solutions to protect the user privacy and data integrity from a …

File-sharing systems like Dropbox offer insufficient privacy because a compromised server
can see the file contents in the clear. Although encryption can hide such contents from the …

Access control is a fundamental keystone in security. Damgard, Haagh, and Orlandi (TCC
2016) introduced access˚ control encryption (ACE) that enforces no-read and no-write rules …

End-to-end encrypted file-sharing systems enable users to share files without revealing the
file contents to the storage servers. However, the servers still learn metadata, including user …

Recent years have seen a strong uptick in both the prevalence and real-world
consequences of false information spread through online platforms. At the same time …

Multi-user oblivious storage allows users to access their shared data on the cloud while
retaining access pattern obliviousness and data confidentiality simultaneously. Most secure …

Oblivious RAM (ORAM), introduced by Goldreich and Ostrovsky (J. ACM '96), is a primitive
that allows a client to perform RAM computations on an external database without revealing …

Owner-centric control is a widely adopted method for easing owners' concerns over data
abuses and motivating them to share their data out to gain collective knowledge. However …