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Chapter 21 Distributed System Security
Copyright © 2008
Introduction
• Issues in Distributed System Security • Message Security
• Authentication of Data and Messages • Third-Party Authentication
Operating Systems, by Dhananjay Dhamdherehamdhere 21.2 2
Copyright © 2008
Issues in Distributed System Security
• Kinds of security threats in distributed OSs: – Leakage of message contents
– Tampering of message contents
– Stealing use of resources without authorization – Denial of service to authorized users
• Leakage and tampering are threats to message security • Threats addressed through two means:
– Message security techniques
Operating Systems, by Dhananjay Dhamdherehamdhere 21.3 3
Copyright © 2008
Security Mechanisms and Policies
Operating Systems, by Dhananjay Dhamdherehamdhere 21.4 4
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Security Attacks in Distributed Systems
• Additionally, security attacks can be classified into: – Passive attacks and active attacks
Operating Systems, by Dhananjay Dhamdherehamdhere 21.5 5
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