Commit 8d9d24cd authored by Xunnamius (Zara)'s avatar Xunnamius (Zara)

TODOs (except overhead) cleared

parent 9c3d2656
......@@ -65,14 +65,13 @@ desired security properties, and adhering to changing OS energy budgets.
Hence, any common-case configuration will inevitably sacrifice one concern for
another, even when it is not optimal to the end user. \emph{But what if our
system did not have to sit at some generic configuration point, especially when
another configuration becomes more desirable later on?}
\subsection{Our Contributions}
another configuration becomes more desirable later on?}\\
\\
\textbf{Our Contributions}\\
To realize the goal of flexibly adjusting storage tradeoffs, we first introduce
a scheme to \emph{quantify} the usefulness or relative ``strength'' of ciphers
based on key security properties relevant to FDE. We call these ``security
scores.'' Using these security scores, we then define a tradeoff space of cipher
scores.'' Using these security scores, we define a tradeoff space of cipher
configurations over competing concerns: total energy use, desirable security
properties in the FDE context, read and write performance, total writable space
on the drive, and how quickly the drive can converge to a single configuration.
......@@ -81,9 +80,8 @@ FDE work by \emph{decoupling} cipher implementations from encryption and
employing various \emph{switching strategies} to ``re-cipher'' those units
dynamically with acceptable overhead.
\TODO{Overhead summary of empirical paragraph here that expounds a bit on the
final sentence of the abstract. We support up to X security configurations, etc.
And then present some empirical results showing the wide range of security and
energy tradeoffs that become available with various state-of-the-art ciphers as
a result.} We find that SwitchCrypt achieves at least \TODO{XXX} improvement
compared to static approaches that must pick only a single operating point.
We implement SwitchCrypt and three switching strategies--\emph{Forward},
\emph{Selective}, and \emph{Mirrored}---along with the ChaCha and Freestyle
stream ciphers through our novel API. We demonstrate cipher switching utility
with empirical data from four case studies. We find that SwitchCrypt achieves at
least \TODO{XXX} improvement compared to static approaches.
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