A covert channel is an information transfer path that permits information to be transferred in
a manner that violates the security policy of a trusted network. An investigation was …

There exist many TCP/IP covert channels in WAN for network hidden communication in last
decades. However, there are few covert channels designed for the LAN while existing WAN …

Exploiting packets’ timing information for covert communication in the Internet has been
explored by several network timing channels and watermarking schemes. Several of them …

Covert channels in modern communication networks are a source of security concerns.
Such channels can be used to facilitate command and control of botnets or inject malicious …

Covert channels are a form of hidden communication that may violate the integrity of
systems. Since their birth in Multi-Level Security systems in the early 70's they have evolved …

Network packet length covert channel modulates secret message bits onto the packet lengths
to transmit secret messages. In this paper, a novel network packet length covert channel is …

The advanced development of computer networks and communication technologies has
made covert communications easier to construct, faster, undetectable and more secure than …

Many people have long been interested in secret interaction across a system of connections.
It has drawn not just trustworthy entities to interact covertly with one another, but also …

The paper concerns passive network covert timing channels, in which the channel senders
reside in intermediate nodes (eg router, gateway) and forward the passing-by packets in a …

A covert channel is a communication channel that is subjugated for illegal flow of information
in a way that violates system security policies. It is a dangerous, invisible, undetectable, …