Designing System Security with UML Misuse Deployment Diagrams

2012 ◽  
Author(s):  
Susan J. Lincke ◽  
Timothy H. Knautz ◽  
Misty D. Lowery
Keyword(s):  
System Security

Enhancing Research in Networking & System Security, and Forensics, in Puerto Rico

2015 ◽  
Author(s):  
Alfredo Cruz ◽  
Jeff Duffany ◽  
Alexander Lopez
Keyword(s):  
Puerto Rico ◽  
System Security

Steady-state Security Assessment Based on K-Means Clustering Algorithm and Phasor Measurement Units

2020 ◽  
Vol 13 (4) ◽  
pp. 559-570
Author(s):  
Bassam A. Hemade ◽  
Hamed A. Ibrahim ◽  
Hossam E.A. Talaat
Keyword(s):  
Steady State ◽  
Clustering Algorithm ◽  
System Security ◽  
Phasor Measurement Units ◽  
Operating Conditions ◽  
Security Assessment ◽  
State Security ◽  
Phasor Measurement ◽  
Measurement Units ◽  
Silhouette Analysis

Background: The security assessment plays a crucial role in the operation of the modern interconnected power system network. Methods: Hence, this paper addresses the application of k-means clustering algorithm equipped with Principal Component Analysis (PCA) and silhouette analysis for the classification of system security states. The proposed technique works on three principal axes; the first stage involves contingency quantification based on developed insecurity indices, the second stage includes dataset preparation to enhance the overall performance of the proposed method using PCA and silhouette analysis, and finally the application of the clustering algorithm over data. Results: The proposed composite insecurity index uses available synchronized measurements from Phasor Measurement Units (PMUs) to assess the development of cascading outages. Considering different operational scenarios and multiple levels of contingencies (up to N-3), Fast Decoupled Power Flow (FDPF) have been used for contingency replications. The developed technique applied to IEEE 14-bus and 57-bus standard test system for steady-state security evaluation. Conclusion: The obtained results ensure the robustness and effectiveness of the established procedure in the assessment of the system security irrespective of the network size or operating conditions.

Separating key management from file system security

1999 ◽  
Vol 33 (5) ◽  
pp. 124-139 ◽  
Author(s):  
David Mazières ◽  
Michael Kaminsky ◽  
M. Frans Kaashoek ◽  
Emmett Witchel
Keyword(s):  
Key Management ◽  
File System ◽  
System Security
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