'Covert channel' diaporamas de présentation

COEN 250

COEN 250. Authorization. Fundamental Mechanisms: Access Matrix. Subjects Objects (Subjects can be objects, too.) Access Rights Example: OS Subjects = Processes Objects = System Resources Access Rights: read, write, execute. Fundamental Mechanisms: Access Matrix. Example: DBMS

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Covert channels detection in protocols using scenarios

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Chapter 11 Phase 5: Covering Tracks and Hiding

Chapter 11 Phase 5: Covering Tracks and Hiding. Attrition Web Site. Contains an archive of Web vandalism attacks http://www.attrition.org/mirror/attrition. Most attackers, however, wish to keep low profile. Hiding Evidence by Altering Event Logs.

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Chapter 11 Phase 5: Covering Tracks and Hiding

Chapter 11 Phase 5: Covering Tracks and Hiding. Attrition Web Site. Contains an archive of Web vandalism attacks http://www.attrition.org/mirror/attrition. Most attackers, however, wish to keep low profile. Hiding Evidence by Altering Event Logs.

436 views • 32 slides

Covert Channels

Covert Channels. Dan Fleck CS 469: Security Engineering. 1. 1. These slides are modified with permission from Bill Young ( Univ of Texas). Is BLP Secure ?. H. Consider the simple lattice of labels in the diagram, where H > L. There are no need -to-know categories in this system .

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Covert Channels, Analysis and Mitigation

Covert Channels, Analysis and Mitigation. CS8440 Fall 2014. Introduction. Covert channels are a means of communication between two processes Processes may be: Authorized to communicate, but not in the way they actually are Prohibited from communicating One process is a Trojan

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Analysis and Detection of Network Covert Channels

Analysis and Detection of Network Covert Channels. Sweety Chauhan CMSC 691 IA 30 th Nov. 2005 chauhan2@umbc.edu. Outline. New and Significant Summary of the results Covert network channels timestamp field as covert channel Network timing channel regularity of timing channel

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Chapter 1: Introduction

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Identification of Covert Channels inside Linux Kernel Based on Source Code

Identification of Covert Channels inside Linux Kernel Based on Source Code. Agenda. Covert channel definition. Possible sources of CCA (Covert Channel Analysis). Methods of CCA in Source Code. Proposed tool to automate CCA on source code of Linux kernel. Conclusion.

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Identification of Covert Channels inside Linux Kernel Based on Source Code

Identification of Covert Channels inside Linux Kernel Based on Source Code. Agenda. Covert channel definition. Possible sources of CCA (Covert Channel Analysis). Methods of CCA in Source Code. Proposed tool to automate CCA on source code of Linux kernel. Conclusion.

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Covert Channel Creation through VPN

Covert Channel Creation through VPN. Prepared by Isakov Yehiel Under Supervision of Dr. Gabi Nakibly. What is a covert channel ?. Definition A :

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Hoda NaghibiJouybari Khaled N. Khasawneh and Nael Abu- Ghazaleh

Constructing and Characterizing Covert Channels on GPGPUs. Hoda NaghibiJouybari Khaled N. Khasawneh and Nael Abu- Ghazaleh. Covert Channel. Malicious indirect communication of sensitive data. Why? There is no communication channel. The communication channel is monitored.

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Auditable Privacy:

Auditable Privacy:. Jong Youl Choi Dept. of Computer Science Indiana University at Bloomington. Philippe Golle Palo Alto Research Center. Markus Jakobsson School of Informatics Indiana University at Bloomington. On Tamper-Evident Mix Networks. jychoi@cs.indiana.edu. pgolle @parc.com.

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Non-Interference

Non-Interference. Dan Fleck CS 469: Security Engineering. 1. 1. 1. These slides are modified with permission from Bill Young ( Univ of Texas). Communication. Recall that earlier we said:

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Covert Channels and Anonymizing Networks

Covert Channels and Anonymizing Networks. Ira S. Moskowitz --- NRL Richard E. Newman --- UF Daniel P. Crepeau --- NRL Allen R. Miller --- just hanging out. Motivation. Anonymity --- What do you think/say? optional desire or mandated necessity

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Tunnelling of Explicit Congestion Notification draft-briscoe-tsvwg-ecn-tunnel-04.txt

Tunnelling of Explicit Congestion Notification draft-briscoe-tsvwg-ecn-tunnel-04.txt. Bob Briscoe , BT IETF-76 tsvwg Nov 2009 This work is partly funded by Trilogy, a research project supported by the European Community www.trilogy-project.org. status.

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CMSC 414 Computer and Network Security Lecture 21

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Official levels of Computer Security

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Temporal Thermal Covert Channels in Cloud FPGAs

Temporal Thermal Covert Channels in Cloud FPGAs. Shanquan Tian and Jakub Szefer Yale University International Symposium on Field-Programmable Gate Arrays (FPGA) February 26 , 2018. Temporal Thermal Covert Channel in FPGAs.

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COVERT CHANNELS Ravi Sandhu

COVERT CHANNELS Ravi Sandhu. A covert channel is a communication channel based on the use of system resources not normally intended for communication between the subjects (processes) in the system. COVERT CHANNELS. Information is leaked unknown to the high user. COVERT CHANNELS.

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