A public-key cryptosystem is usually used for key management, in particular to session key management. The paper presents a method for handling a batch of concurrent keys with homomorphic publickey cryptosystems such as RSA, Paillier and ElGamal. Theorematically, regardless Shacham and Boneh proved that it is impossible to provide batch RSA encryption of messages with a single certificate, the ...

With the accelerating process of urbanization, developing countries are facing growing pressure to pursue energy savings and emission reductions, especially in urban passenger transport. In this paper, we built a Beijing urban passenger transport carbon model, including an economy subsystem, population subsystem, transport subsystem, and energy consumption and CO2 emissions subsystem using Syst...

Public transportation has been one of the most important research fields in the two last decades. The purpose of this paper is to create a schedule for public transport fleets such as buses and metro trains with the goal of minimizing the total transfer waiting time. We extend previous research works in the field of transit schedule with considering headways of each route as decision variables....

public participation is counted as one of the main indexes in sustainable urban management.based on their nature, metropolitan cities has several and complex problems. for this purpose tehranmetropolitan area is selected. quantitative strategic planning matrix (qspm) weighted through a made-byresearcherquestionnaire. the reliability of the model was verified by cronbach’s alpha coefficient. eva...

the objective of this paper is to examine linkages between new public management and the process of globalization. although the linkage of the two subjects has been inadequately considering the literature, one can find strong parallels between them, particularly with respect to the theme of globalization as the victory of economics over politics, and that of the parallel reforms of competition ...

Running public service organizations that is used in government and public service institutions and agencies, at both sub-national and national levels is a major area of research in public policy in the era of globalization. Thus, the aim of this paper is to probe relationships between new public management and the process of globalization. It argues that the emergence of NPM is the consequence...

The issue of teaching transport geography at the undergraduate level has rarely been the focus of much discussion, although geographical education itself has received a lot of attention. 1 Over the last 40 years, transport geography has been part of the curriculum of many geography programs, providing a significant contribution, both conceptually and methodologically. Indeed, many spatial theor...