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.
|Title of host publication||New Approaches for Security, Privacy and Trust in Complex Environments|
|Subtitle of host publication||Proceedings of the IFIP TC-11 22nd International Information Security Conference (SEC 2007), 14-16 May 2007, Sandton, S. Africa|
|Number of pages||12|
|Publication status||Published - 26 Nov 2007|
|Name||IFIP International Federation for Information Processing|
- Information Systems and Management