This paper studies the security of the trusted center in a b-secure t-group key distribution scheme in which the center issues a private information vi 2 V to each user i based on the center secret s 2 S. User i can obtain the common key k 2 K with t ? 1 other users from vi so that any dishonest b users cannot learn any key they should not know. First, we show how to distribute the power of the...

Humanitarian organizations pre-position relief items in pre-disaster and distribute them to the affected areas in post-disaster. Improper planning of emergency operations causes more deaths in post-disaster. In this paper, the problem of relief item pre-positioning and multi-period distribution planning is addressed considering lateral transhipment among distribution centres to improve the effi...

background and aim: post-traumatic stress disorder is one of the anxiety disorders which occur in postpartum period. the prevalence of ptsd – induced by preeclampsia has been already reported as 28%, however no study was found to compare ptsd in primiparous and multiparous women. this study was therefore conducted to compare ptsd in primiparous and multiparous women. methods: this comparative d...

Security is an indispensable concern in Wireless Sensor Network (WSN) due to the presence of potential adversaries. For secure communication in infrastructureless sensor nodes various key predistribution have been proposed. In this paper we have evaluated various existing deterministic, probabilistic and hybrid type of key pre-distribution and dynamic key generation algorithms for distributing ...

In this article, we demonstrate that the asymmetric key-based architecture for securing wireless sensor networks recently introduced by Haque et al. is insecure under impersonation attack, since it does not provide authentication semantics. In addition, we show that, for the scheme to work correctly, the resulting key distribution construction should be symmetric and group-wise.

Multicasting has been widely utilized for delivering messages from one sender to multiple recipients. Nowadays in some applications such as pay per view or videoconferencing systems, the messages delivered via multicasting should be available to authorized recipients only. Therefore, secure multicasting becomes an important design issue in distributed environment. To achieve secure multicasting...

Recently, in Journal of Security and Communication Networks (5(12):1363-1374, DOI: 10.1002/ sec.429), Wang et al. proposed a group key distribution scheme with self-healing property for wireless networks in which resource is constrained. They claimed that their key distribution scheme satisfies forward security, backward security and can resist collusion attack. Unfortunately, we found some sec...

Sensor nodes are tiny, low-power and battery constrained electromechanical devices that are usually deployed for sensing some type of data in different types of areas. Because of their memory and computational restrictions, public key cryptography (PKC) systems are not suited for sensor nodes to provide security. Instead, private key cryptography is preferred to be used with sensor networks and...