Paper Info
Title
Chainiac: Proactive Software-Update Transparency Via Collectively Signed Skipchains And Verified Builds
Abstract
Software-update mechanisms are critical to the security of modern systems, but their typically centralized design presents a lucrative and frequently attacked target. In this work, we propose CHAINIAC, a decentralized software update framework that eliminates single points of failure, enforces transparency, and provides efficient verifiability of integrity and authenticity for software-release processes. Independent tn collectively verify conformance of software updates to release policies, l fi validate the source-to-binary correspondence, and a tamper-proof release log stores collectively signed updates, thus ensuring that no release is accepted by clients before being widely disclosed and validated. The release log embodies a a n, a novel data structure, enabling arbitrarily out-of-date clients to efficiently validate updates and signing keys. Evaluation of our CHAINIAC prototype on reproducible Debian packages shows that the automated update process takes the average of 5 minutes per release for individual packages, and only 20 seconds for the aggregate timeline. We further evaluate the framework using real-world data from the PyPI package repository and show that it offers clients security comparable to verifying every single update themselves while consuming only one-fifth of the bandwidth and having a minimal computational overhead.
Year
Venue
DocType
2017
PROCEEDINGS OF THE 26TH USENIX SECURITY SYMPOSIUM (USENIX SECURITY '17)
Conference
Volume
Citations 
PageRank 
2017
0
0.34
References 
Authors
11
8
Name
Order
Citations
PageRank
Kirill Nikitin141.43
Eleftherios Kokoris-Kogias214914.56
Philipp Jovanovic326619.22
Linus Gasser41438.99
Nicolas Gailly51428.64
Ismail Khoffi6774.35
Justin Cappos7174.48
Bryan Ford81573149.56