When wireless senor networks (WSNs) are deployed in hostile areas, they indeed need to be secured by security mechanisms. To do this, cryptographic keys must be agreed on by communicating nodes. Unluckily, due to resource constraints, the key agreement problem in wireless sensor networks becomes quite intricate. In this paper, we propose a new ID-based random key pre-distribution scheme that is...

Wireless sensor network (WSN) has been an active research topic because its application encompasses various domains. In particular, a lot of attentions have been paid to the common feature of WSN to show that every node in a large enough network contains certain properties. Real-world applications of random key pre-distribution naturally involve geometric and combinatorial techniques and are ev...

Key pre-distribution (KPD) schemes, are inherently trade-offs between security and complexity, and are perhaps well suited for securing large-scale deployments of resource constrained nodes without persistent access to a trusted authority (TA). However, the need to offset their inherent security limitations, calls for some degree of tamper-resistance of nodes. Obviously, if absolute tamper-resi...

We report on a complete experimental implementation of a quantum key distribution protocol through a free space link using polarization-entangled photon pairs from a compact parametric down-conversion source. Over 10 hours of uninterrupted communication between sites 1.5 km apart, we observe average key generation rates of 630 per second after error correction and privacy amplification. Our sch...

To achieve security in wireless sensor networks, it is important to be able to encrypt and authenticate messages sent among sensor nodes. Keys for encryption and authentication purposes must be agreed upon by communicating nodes. Key establishment in sensor networks is a challenging problem because asymmetric key cryptosystems are unsuitable for use in resource constrained sensor nodes, and als...

Key management is the base of wireless sensor network security, key pre-distribution way is a high feasibility method in key management. The network connectivity rate, resilience against node capture and the storage consumption are important performance indicators in key pre-distribution way. However, most of the existing key pre-distribution schemes of wireless sensor network have the problems...

Operating systems and applications rely on random number generators (RNGs) for a number of important tasks, most notably cryptographic key generation. The impact of flawed random number generation practices has been studied extensively in the past [2, 5]. In this paper, we examine the implications of an RNG bug in FreeBSD that was fixed by Subversion commit r278907 [3]. In particular, our analy...

We Haar uniformly generate random states of various ranks and study their performance in an entanglement-based quantum key distribution (QKD) task. In particular, we analyze the efficacy two-qubit realizing device-independent (DI) QKD. first find normalized entanglement Bell-nonlocality which are resource for DI-QKD ranging from rank-1 to rank-4. The number entangled as well Bell-nonlocal decre...