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2025-03-04 16:28:39 -05:00
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sections/design.tex
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@@ -282,7 +282,7 @@ When evaluating a \korg attacker model gadget against a \promela model and a liv
property and produce a garbage attack trace. To prevent this, we make the following considerations.
First, we design our \korg gadgets such that they never arbitrarily send and consume messages to a single channel. Second, we allow \korg gadgets,
which are always processing messages on channels, to arbitrarily "skip" messages on a channel if need be. To demonstrate the latter, consider the extension of the drop attacker model gadget in Figure \ref{lst:drop_passer}. We implement message skipping by arbitrarily stopping and waiting after observing a message on a channel; once the channel is observed changing lengths, the message is considered skipped and future messages can be consumed.
which are always processing messages on channels, to arbitrarily "skip" messages on a channel if need be. We implement message skipping by arbitrarily stopping and waiting after observing a message on a channel; once the channel is observed changing lengths, the message is considered skipped and future messages can be consumed.
\textbf{Passing Messages On Channels}.
In order to arbitrarily pass messages on channels in \spin, required functionality for all three gadgets we present, we exploit the finite channel length assumption. Our \spin gadget is shown below.