SPINS: security protocols for sensor networks
Proceedings of the 7th annual international conference on Mobile computing and networking
OCB: A block-cipher mode of operation for efficient authenticated encryption
ACM Transactions on Information and System Security (TISSEC)
LEAP: efficient security mechanisms for large-scale distributed sensor networks
Proceedings of the 10th ACM conference on Computer and communications security
Multilevel μTESLA: Broadcast authentication for distributed sensor networks
ACM Transactions on Embedded Computing Systems (TECS)
The dynamic behavior of a data dissemination protocol for network programming at scale
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
TinySec: a link layer security architecture for wireless sensor networks
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
Securing the deluge Network programming system
Proceedings of the 5th international conference on Information processing in sensor networks
An efficient broadcast authentication scheme in wireless sensor networks
ASIACCS '06 Proceedings of the 2006 ACM Symposium on Information, computer and communications security
Sluice: Secure Dissemination of Code Updates in Sensor Networks
ICDCS '06 Proceedings of the 26th IEEE International Conference on Distributed Computing Systems
MiniSec: a secure sensor network communication architecture
Proceedings of the 6th international conference on Information processing in sensor networks
TinyECC: A Configurable Library for Elliptic Curve Cryptography in Wireless Sensor Networks
IPSN '08 Proceedings of the 7th international conference on Information processing in sensor networks
Broadcast secrecy via key-chain-based encryption in single-hop wireless sensor networks
EURASIP Journal on Wireless Communications and Networking - Special issue on security and resilience for smart devices and applications
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Symmetric encryption of data at the base-station using time-varying keys has been proposed as an attractive method for securing broadcasts in wireless sensor networks: symmetric decryption keeps computational costs at sensor nodes low, while time-varying group keys protect the network against key compromise at any of the receivers. However, a significant problem is that interference or disconnections may cause a receiver to miss broadcast packets and the dynamic keys contained therein, rendering it unable to participate in subsequent broadcasts. In this paper, we develop a scheme which allows receivers to recover from key loss in a secure, efficient, and scalable manner. Our scheme appends recovery information to each broadcast message to help out-of-sync receivers reattach probabilistically using an older key. We analyze our scheme to quantify the recovery probability as a function of system parameters, and deduce fundamental asymptotic bounds on recovery. We further prototype our scheme on the MicaZ mote platform and show that it is lightweight and efficient. Our solution offers a highly configurable, efficient and scalable method for key recovery in large sensor networks that require secure broadcasts.