Crafting Web Counters into Covert Channels

International Federation for Information Processing Digital Library; New Approaches for Security, Privacy and Trust in Complex Environments; 01/2007; DOI: 10.1007/978-0-387-72367-9_29
Source: OAI


Almost all the previously proposed network storage channels write covert messages in the packets protocol fields. In contrast, we present in this paper a new network storage channel WebShare that uses the plentiful, public Web counters for storage. Therefore, the physical locations of the WebShare encoder and decoder are not restricted to a single path. To make WebShare practical, we have addressed a number of thorny issues, such as the noise introduced by other legitimate Web requests, and synchronization between encoder and decoder. For the proof-of-concept purpose, we have experimented a WebShare prototype in the Internet, and have showed that it is practically feasible even when the Web counter and the encoder/decoder are separated by more than 20 router hops. Full Text at Springer, may require registration or fee

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Available from: Edmond W. W. Chan
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