We identify a class of covert timing channels with the following properties. (1) existing covert timing channel analysis techniques are inappropriate for the channels in this class; and (2) it includes the fastest (i.e., highest capacity) covert channels known to date. Since channels in this class are exploited by counting the occurrences of certain events, we call them counting channels. We de...

Covert timing channels aim at transmitting hidden messages by controlling the time between transmissions of consecutive payload packets in overt network communication. Previous results used encoding mechanisms that are either easy to detect with statistical analysis, thus spoiling the purpose of a covert channel, and/or are highly sensitive to channel noise, rendering them useless in practice. ...

Abstract Covert research has a mixed reputation within the scientific community. Some are unsure of its moral worth, others would proscribe it entirely. This stems largely from lack knowledge about reasons for choosing covert method. In this chapter, these will be reconstructed in detail and all elements that allow one to judge level ethicality laid out reader. particular, chapter answer follow...

Covert channel is a major threat to the information system security and commonly found in operating systems, especially in cloud computing environment. Owing to the characteristics in cloud computing environment such as resources sharing and logic boundaries, covert channels become more varied and difficult to find. Focusing on those problems, this paper presents a universal method for detectin...

Cabuk, Serdar Ph.D., Purdue University, December, 2006. Network Covert Channels: Design, Analysis, Detection, and Elimination. Major Professors: Carla E. Brodley and Eugene H. Spafford. Indirect communication channels have been effectively employed in the communications world to bypass mechanisms that do not permit direct communication between unauthorized parties. Such covert channels emerge a...

Information security and privacy in general are major concerns that impede enterprise adaptation of shared or public cloud computing. Specifically, the concern of virtual machine (VM) physical co-residency stems from the threat that hostile tenants can leverage various forms of side channels (such as cache covert channels) to exfiltrate sensitive information of victims on the same physical syst...

Cabuk, Serdar Ph.D., Purdue University, December, 2006. Network Covert Channels: Design, Analysis, Detection, and Elimination. Major Professors: Carla E. Brodley and Eugene H. Spafford. Indirect communication channels have been effectively employed in the communications world to bypass mechanisms that do not permit direct communication between unauthorized parties. Such covert channels emerge a...