We identify a flaw in the security proof and a flaw in the concrete security analysis of the WOTS-PRF variant of the Winternitz one-time signature scheme, and discuss the implications to its concrete security.

A convenient family member of composite columns is concrete filled double skin tube (CFDST); it contains two tubes concentric steel and also shell that there between them. The superior or equal potential offering characteristics CFDST are more than counterparts classical (CFST). purposes the present study to provide experimental investigation results into prestressed load-carrying capacity colu...

Appropriate curing of concrete is necessary to obtain maximum durability and achieve designed strength for exposed different environmental conditions. Curing regarded as the means regulating degree extent loss moisture from when cement in undergoing hydration. This study made a comparative consequence adopting methods on compressive modified with Palm Kernel Shell (PKS) aggregate. Concrete cube...

curls and curves of a shell interweave its various strain modes and link them together. this interactional behavior has yet frustrated all attempts for the construction of shell templates, which needs for an individual element test in traditional approaches. such a test fails to work for shell elements and must be reconstructed. in this paper, it is tried to study shell interactional behavior a...

As the world population continues to increase, so does demand for raw materials produce basic needs of human race. One areas where this pressing means production is evident in concrete building construction and infrastructure. The source constitutive production, such as cement aggregates are fast shrinking across nations earth, there an urgent need substitutes that will guarantee availability e...