1992/10/01 by John C. Wray
Computer Science · #Advanced Steganography and Watermarking Techniques #Chaos-based Image/Signal Encryption #Internet Traffic Analysis and Secure E-voting
paper · doi:10.3233/jcs-1992-13-403
openalex publication_date 1992/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Covert channels have traditionally been categorized as either storage channels or timing channels [8, 9]. This paper questions this categorization, and discusses channels that cannot be clearly identified as either storage or timing channels, but have aspects of both. A new model of timing channels is presented, which allows for channels that have characteristics of both storage channels and timing channels, and a method is given for constructing all channels in a computer system that have timing channel characteristics. Since Kemmerer's shared resource matrix methodology [7] has the potential to detect all channels that have storage characteristics, it is argued that the two methods jointly have the capability to construct all channels in a computer system. The approach to timing channels provides a justification of specific mechanisms for reducing their bandwidth which were employed in the VAX11VAX is a trademark of Digital Equipment Corporation. Virtual Machine Monitor, as described in [4] and [5].