PS10. Random Value Pattern (also P5)

Initial publication S. Wendzel, S. Zander, B. Fechner, C. Herdin in [1]
Illustration The covert channel embeds hidden data in a header element containing a (pseudo-)random value.
Context Network Covert Storage Channels → Modification of Non-Payload → Structure Preserving → Modification of an Attribute
Evidence J. Keller, S. Wendzel. Reversible and Plausibly Deniable Covert Channels
in One-Time Passwords Based on Hash Chains
Applied Sciences, Vol. 11(2), MDPI, 2021.

C. H. Rowland. 1997. Covert Channels in the TCP/IP Protocol Suite.
First Monday 2, 5 (May 1997).

J. Rutkowska. 2004. The implementation of passive covert channels in
the Linux kernel
. (2004). Speech held at the 21st Chaos Communication
Congress, Berlin, Germany,

N. Lucena, J. Pease, P. Yadollahpour, and S. J. Chapin. 2004. Syntax and
Semantics-Preserving Application Layer Protocol Steganography
. In
Proceedings of 6th Information Hiding Workshop.

In [1], additional information on the evidence is provided.
Implementation e.g. C. Heinz: TLSCC (University of Hagen)

[1] S. Wendzel, S. Zander, B. Fechner, C. Herdin: Pattern-based Survey and Categorization of Network Covert Channel Techniques, ACM Computing Surveys, Vol. 47, Issue 3, pp. 50:1-26, ACM, 2015.
An early version of the article is available here: download.

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