Search results for "Covert channel"

showing 2 items of 2 documents

An asynchronous covert channel using spam

2012

AbstractCurrent Internet e-mail facilities are built onto the foundation of standard rules and protocols, which usually allow a considerable amount of “freedom” to their designers. Each of these standards has been defined based on a number of vendor specific implementations, in order to provide common inter-working procedures for cross-vendor communication. Thus, a lot of optional and redundant information is being exchanged during e-mail sessions, which is available to implement versatile covert channel mechanisms.This work exploits this possibility by presenting a simple but effective steganographic scheme that can be used to deploy robust secret communication through spam e-mails. This s…

Computer scienceRetransmissionCovert channelAsynchronous covert channelData lossComputer securitycomputer.software_genreSecure communicationModelling and SimulationCommunication sourceRaptor codeStegosystemSpam steganographybusiness.industryE-mail steganographyComputational MathematicsComputational Theory and MathematicsAsynchronous communicationRaptor codesSecure communicationModeling and SimulationKey (cryptography)businessAsynchronous covert channel; E-mail steganography; Raptor codes; Secure communication; Spam steganography; Stegosystem; Modeling and Simulation; Computational Theory and Mathematics; Computational MathematicscomputerComputer networkComputers & Mathematics with Applications
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DNS Tunneling Detection Techniques – Classification, and Theoretical Comparison in Case of a Real APT Campaign

2017

Domain Name System (DNS) plays an important role as a translation protocol in everyday use of the Internet. The purpose of DNS is to translate domain names into IP addresses and vice versa. However, its simple architecture can easily be misused for malicious activities. One huge security threat concerning DNS is tunneling, which helps attackers bypass the security systems unnoticed. A DNS tunnel can be used for three purposes: as a command and control channel, for data exfiltration or even for tunneling another protocol through it. In this paper, we surveyed different techniques for DNS tunneling detection. We classified those first based on the type of data and then within the categories b…

DNS tunneling detectionSIMPLE (military communications protocol)business.industryComputer scienceDomain Name SystemComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS020206 networking & telecommunications02 engineering and technologyComputer securitycomputer.software_genreDomain (software engineering)protokollat0202 electrical engineering electronic engineering information engineeringAPT020201 artificial intelligence & image processingThe Internetcovert channels detectiontietoturvabusinesscomputerProtocol (object-oriented programming)
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