We propose a security framework for Decentralized Shared Calendar. The proposed securityframework provides confidentiality to replicated shared calendar events and secures the commu-nication between users. It is designed in such a way that DeSCal preserves all of its characteristicfeatures like fault-tolerance, crash recovery, availability and dynamic access control. It has been...

Many efficient secret sharing schemes for general access structures have been developed in efforts to deal with the problems of multi-party computations (MPC), threshold cryptography, and access control. In this paper, we have proposed a novel secret sharing scheme with general access structures that is based on the key-lock-pair mechanism. In our scheme, the dealer can assess a real situation ...

The VHDL Standard current allows concurrent access to variables shared between processes, but does not define any semantics for concurrency control. The IEEE 1076a Shared Variables Working Group has developed a form of monitors, called protected types, to provide mutually exclusive access to shared variables. This article identifies the problems that can arise from unprotected concurrent access...

In shared memory multiprocessors combining networks serve to eliminate hot spots due to concurrent access to the same memory location Examples are the NYU Ultracomputer the IBM RP and the Fluent Machine We present a problem that occurs when one tries to implement the Fluent Machine s network nodes with network chips that do not know their position within the network We formulate the problem mat...

This paper presents a new compiler algorithm to eliminate invalidation traffic in virtual shared memory using a hybrid distributed invalidation scheme. It aggressively exploits static scheduling and data layout to accurately determine only those instances when invalidation is necessary, thus avoiding the additional read misses of previous schemes. Equations determining precisely what data shoul...