Global ETD Search
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Showing 1 to 12 of 12 for “"Covert channel"”.
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Detection of covert channel communications based on intentionally corrupted frame check sequences
This thesis presents the establishment of a covert-channel in wireless networks in the form of frames with intentionally corrupted Frame Check Sequences (FCSs). Previous works had alluded to the possibility of using this kind of covert-channel as an attack vector. We modify a simulation tool, …
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A study of covert queueing channels in shared schedulers
We study covert queueing channels (CQCs), which are a kind of covert timing channel that may be exploited in shared queues across supposedly isolated users. In our system model, a user modulates messages to another user via his pattern of access to the shared resource. One example of such a channel …
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Sneak-peek: high speed covert channels in data center networks
… In this thesis, we present a novel network-based covert channel that can arise in the context of shared network resources in data-center environments even in the presence of network monitors regulating flow destinations with NAC policies and VLAN-based isolation mechanisms. Through a series of …
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Network-aware Active Wardens in IPv6
… might have a legitimate reason to communicate covertly. And at the same time, the use of digital communications for business, military, and also criminal purposes gives equally compelling reasons for monitoring them thoroughly. Covert channels are communication mechanisms that were never …
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Timing channel codes for covert communication and network flow tracing
The goal of this thesis is to achieve covert communication, i.e. to covertly relay information using resources that are traditionally unintended for data transmission. In a covert channel, only the sender and receiver are aware of the communication and capable of reading the transmitted message, …
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Surveillance: From Solutions to New Problems
… three fronts. First, it designs and assesses a covert communication system designed to facilitate two-way real-time text conversations over a steganographic covert channel in online games. Second, this dissertation evaluates user defenses in the webtracking context to rigorously evaluate the …
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Timing channels in traffic analysis
"We study two timing channel problems abstracted from practices of network traffic analysis. The first timing channel exists in a router receiving packets from two users; due to the sharing of router buffer, queuing delays of one user's packets incidentally convey information about the other user's …
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Leveraging concurrency for performance and security
… enable the detection of otherwise undetectable covert channel attacks using two techniques -- ReplayConfusion and ReplayEndurance. %These techniques allow the detection of covert channels which flow across the Last Level Cache or across the speculative execution boundary. Covert channels encode …
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Manufacturing espionage: from the front office to the factory floor
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms