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Diffstat (limited to 'paper/ihsm_paper.tex')
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1 files changed, 5 insertions, 5 deletions
diff --git a/paper/ihsm_paper.tex b/paper/ihsm_paper.tex index 4886693..6beb9a2 100644 --- a/paper/ihsm_paper.tex +++ b/paper/ihsm_paper.tex @@ -62,8 +62,8 @@ \section{Introduction} -While information security technology has matured a great deal in the last half century, physical security not kept up -with the pace of the remainder of this industry. Given the right skills, physical access to a computer still often +While information security technology has matured a great deal in the last half century, physical security did not keep +up with the pace of the remainder of this industry. Given the right skills, physical access to a computer still often allows full compromise. The physical security of modern server hardware hinges on what lock you put on the room it is in. @@ -445,8 +445,8 @@ During shipping, the IHSM will require a continuous power supply. The most pract ship the IHSM along with a small backup battery. Following our conservative estimate in Section~\ref{sec-power-failure}, a 48-hour shipping window as is offered by many courier shipping services could easily be bridged with the equivalent of 5-10 laptop batteries. In case a built-in battery backup is not necessary in the IHSM's application, these batteries -could be connected as an external device that is disconnected and sent back to the IHSM's manufacturer after the IHSM -has been installed. +could be connected as an external device akin to a ``power bank'' that is disconnected and sent back to the IHSM's +manufacturer after the IHSM has been installed. \section{Attacks} \label{sec_attacks} @@ -719,7 +719,7 @@ a measurement range of $\pm 120\,g$. At its 14-bit resolution, one LSB correspon Our prototype IHSM uses a motor controller intended for use in RC quadcopters. In our experimental setup, we manually control this motor controller through an RC servo tester. In our experiments we externally measured the device's speed of rotation using a magnet fixed to the rotor and a reed switch held close. The reed switch output is digitized using an -USB logic analyzer at a sample rate of $\SI{100}{\mega\hertz}$. We calculcate rotation frequency as a +USB logic analyzer at a sample rate of $\SI{100}{\mega\hertz}$. We calculate rotation frequency as a $\SI{1}{\second}$ running average over debounced interval lengths of this captured signal\footnote{A regular frequency counter or commercial tachometer would have been easier, but neither was available in our limited COVID-19 home office lab.}. |