Results 221 to 230 of about 5,535 (255)

Multi-Covert Channel Attack in the Cloud

2019 Sixth International Conference on Software Defined Systems (SDS), 2019
Frequently, it is believed that the adoption of encryption is adequate to ensure the safety of the message. However, encryption only restricts unapproved individuals from decoding the message. Whereas in many circumstances, the mere presence of communication or variations in communication patterns, such as an increase in message rate, is sufficient to ...
Akil M., Mancini L. V., Venturi D.
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The covert channel limiter revisited

ACM SIGOPS Operating Systems Review, 1989
In a previous article 1 , I introduced the idea of a mechanism (the covert channel limiter) that would watch for the potential uses of covert channels and affect the responsible process (or process group) only when such potential uses exceeded the allowable bandwidth for covert channels.
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Lattice scheduling and covert channels

Proceedings 1992 IEEE Computer Society Symposium on Research in Security and Privacy, 2003
The lattice scheduler is a process scheduler that reduces the performance penalty of certain covert-channel countermeasures by scheduling processes using access class attributes. The lattice scheduler was developed as part of the covert-channel analysis of the VAX security kernel. The VAX security kernel is a virtual-machine monitor security kernel for
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On the Formal Characterization of Covert Channel

2004
This paper presents a formal characterization model for covert channel. Some characteristic properties are proposed. The system characteristics are used to guide the development of covert channel identification and elimination algorithms. In addition, we audit a covert channel and evaluate the developed algorithms quantitatively with our formalism.
Shiguang Ju, Xiaoyu Song
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Covert channels in LAN protocols

1989
Encryption is generally understood as being the basic mechanisms for LAN security. However, usage of encryption finds its limitations in case of an unauthorized information flow via covert channels. Some covert storage and timing channels inherent in a LAN's architecture are already described in the literature. This paper takes a more general approach.
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Oracle Attacks and Covert Channels

2005
In this paper, well-known attacks named oracle attacks are formulated within a realistic network communication model where they reveal to use suitable covert channels, we name oracle channels. By exploiting information-theoretic notions, we show how to modify detection/authentication watermarking algorithms in order to counteract oracle attacks.
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Covert Wireless Communications Under Quasi-Static Fading With Channel Uncertainty

IEEE Transactions on Information Forensics and Security, 2021
Khurram Shahzad, Xiangyun Zhou
exaly  

Mathematical Models of the Covert Channels

2001
The analysis of the covert channels is necessary for construction of the protected computer systems, stenography, including methods of construction of labels for the intellectual property protection and secure labels of the copies of information objects.
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Novel classes of side channels and covert channels

2010
Das Aufdecken neuer Arten von Angriffen ist wichtig zur Verbesserung der Sicherheit von sicherheitskritischen Systemen, da nur für bekannte Angriffe Gegenmaßnahmen ergriffen werden können. Deshalb untersuchen wir in dieser Arbeit neue Arten von Angriffen sowie geeignete Gegenmaßnahmen. Die Arbeit gliedert sich in drei Teile.
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EBDL: Effective blockchain-based covert storage channel with dynamic labels

Journal of Network and Computer Applications, 2023
Chuan Zhang, Liehuang Zhu, Chang Xu
exaly