Anais - Engenharia de Redes de Comunicação - UnB

the authors work on a 3-tier architecture and propose a secure mechanism to anonymously
authenticate mesh clients to mesh routers. To achieve this, they employ Chaum’s blind
signature scheme. However, their solution only works if the communication between
mesh clients and routers are single-hop. Based on this same architecture, a recent work
[Wan et al. 2009] presents two protocols for privacy protection in WMN in a metropolitan
scale. In a basic protocol, group signatures are used to authenticate mesh clients to mesh
routers. This approach achieves privacy against eavesdroppers, but it reveals the client’s
identity to mesh routers. To solve this, the authors propose an advanced protocol which
uses pairwise shared secrets along with group signatures to keep mesh clients anonymous
from mesh routers.
5. Conclusion
This work presented a solution based on some of the principles employed by Wu and Li’s
protocol to address the challenge of achieving anonymous communication in WMN. The
solution avoids that a node directly sends data to the gateway router. Instead, it waits for a
token to arrive and, thus, anonymously communicating. Our protocol makes it difficulty
for an adversary launching the so-called intersection attack, due to the non-deterministic
feature of the routing protocol. In addition, we have produced a more effective solution,
since mesh nodes can simultaneously communicate with the gateway within the same
session.
Acknowledgment - This work was partially supported by SEDEC and FAPESPA.
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