A method for obtaining digital signatures and public-key cryptosystems
Communications of the ACM
SPINS: security protocols for sensor networks
Proceedings of the 7th annual international conference on Mobile computing and networking
A key-management scheme for distributed sensor networks
Proceedings of the 9th ACM conference on Computer and communications security
Establishing pairwise keys in distributed sensor networks
Proceedings of the 10th ACM conference on Computer and communications security
LEAP: efficient security mechanisms for large-scale distributed sensor networks
Proceedings of the 10th ACM conference on Computer and communications security
Establishing Pairwise Keys for Secure Communication in Ad Hoc Networks: A Probabilistic Approach
ICNP '03 Proceedings of the 11th IEEE International Conference on Network Protocols
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Because sensor networks consist of devices with weak physical security, they are likely to be compromised by an attacker. So, it is very important to establish a pairwise key securely between the communicating nodes. However, utilizing one hop local keys are known to be very vulnerable to threats caused by compromised nodes. This paper proposes a scheme where each node establishes three hop local keys at network boot-up time and employs them for a later pairwise key establishment. When any two nodes agree a pairwise key, all nodes on the route between two nodes contribute to the agreement of the pairwise key. Here, the initial three hop local keys are employed for encrypting a secret key delivered from a node to other nodes. Therefore, the proposed scheme bothers attackers to compromise much more nodes than the scheme using one hop local keys only. The simulation results showed that the proposed scheme provides better performance and higher security than the one hop local key based scheme.