@inbook {IOPORT.06105437, author = {Zegzhda, Peter D. and Zegzhda, Dmitry P. and Kalinin, Maxim O. and Konoplev, Artem S.}, title = {Security modeling of grid systems using Petri nets.}, year = {2012}, booktitle = {Computer network security. 6th international conference on mathematical methods, models and architectures for computer network security, MMM-ACNS 2012, St. Petersburg, Russia, October 17--19, 2012. Proceedings}, isbn = {978-3-642-33703-1}, pages = {299-308}, publisher = {Berlin: Springer}, doi = {10.1007/978-3-642-33704-8_25}, abstract = {Summary: The paper reviews the security problem with computing and information resources in Grid systems. It discusses security relative characteristics of Grid architecture and provides a common threat model of Grid. It summarizes methods being applied to improve security of Grid systems and discusses their disadvantages. There is proposed the Petri-net-based model of access control for Grid systems. That model enhances Grid security with trusted `job' submission (in strict accordance with security policy constraints) and verification of the security implementation in Grid systems.}, identifier = {06105437}, }