An Epitome of Multi Secret Sharing Schemes for General Access Structure

Secret sharing schemes are widely used now a days in various applications, which need more security, trust and reliability. In secret sharing scheme, the secret is divided among the participants and only authorized set of participants can recover the secret by combining their shares. The authorized set of participants are called access structure of the scheme. In Multi-Secret Sharing Scheme (MSSS), k different secrets are distributed among the participants, each one according to an access structure. Multi-secret sharing schemes have been studied extensively by the cryptographic community. Number of schemes are proposed for the threshold multi-secret sharing and multi-secret sharing according to generalized access structure with various features. In this survey we explore the important constructions of multi-secret sharing for the generalized access structure with their merits and demerits. The features like whether shares can be reused, participants can be enrolled or dis-enrolled efficiently, whether shares have to modified in the renewal phase etc., are considered for the evaluation

On The Center Sets and Center Numbers of Some Graph Classes

For a set $S$ of vertices and the vertex $v$ in a connected graph $G$, $\displaystyle\max_{x \in S}d(x,v)$ is called the $S$-eccentricity of $v$ in $G$. The set of vertices with minimum $S$-eccentricity is called the $S$-center of $G$. Any set $A$ of vertices of $G$ such that $A$ is an $S$-center for some set $S$ of vertices of $G$ is called a center set. We identify the center sets of certain classes of graphs namely, Block graphs, $K_{m,n}$, $K_n-e$, wheel graphs, odd cycles and symmetric even graphs and enumerate them for many of these graph classes. We also introduce the concept of center number which is defined as the number of distinct center sets of a graph and determine the center number of some graph classes

Relative importance of Farmers’ Characteristics in Predicting their Knowledge about Indigenous Agricultural Practices

This study was conducted to identify the farmers’ characteristics that act as factors in influencing their knowledge on indigenous agricultural practices. The study was conducted in the state of Kerala among 40 farmers each of ten selected horticultural crops. Step wise regression analysis and multiple linear regression analysis were employed to identify the influencing factors. The study revealed that age, farm power status, innovativeness, rational orientation, communication status, and social participation status positively influence knowledge of farmers on indigenous agricultural practices whereas material status, educational status, and family status were the important characteristics of farmers negatively influencing the knowledge of indigenous practices

ASSESSMENT OF DEBRIS FLOW DISASTER IN A RESERVE FOREST AREA, KERALA

Slope failures are common geo hazards in the Western Ghats during monsoon period. In the present study an attempt is made to understand the mechanism of debris flow in Akamala area of Kerala Western Ghats and to evaluate the chances of failure in the area in future. Due to debris flow the families in the settlements at the foot hills were evacuated and relocated elsewhere by administrators. The area is still failure prone, and may fail as number potential failure surfaces exist in the site. The geometrical analysis of the slopes were carried out to identify the type of failure happened on the slope and also to examine whether the vulnerability of the profile to failure still exists in the site. Angle of internal friction (Ø), plastic limit, liquid limit and plasticity index of the samples were determined in the geotechnical laboratory. The geoenvironmental set up of the Akamala region indicate that slope, relative relief, soil characteristics, degraded patches within the forest, discontinuities have rendered the hill slope prone to slope failures. The degradation of forest permitted large of amount of rain water entering the ground beneath the slope. The wild deep rooted trees in forest usually bolt the overburden to the underlaying rock. The lack of vegetation caused the rise in the piezometric surface which increased the pore water pressure and decreased the shearing resistance. The study brings about the fact that an effort must be there to identify and locate the degraded forest areas close to community living centers and highways. This must be given top priority in forest management policy to avoid grate disaster