Attribute-Based Access Control: Insights and Challenges

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Attribute-Based Access Control: Insights and Challenges Ravi Sandhu Executive Director and Chief Scientist Professor of Computer Science Lutcher Brown Chair in Cyber Security University of South Florida April 4, 2018 ravi.sandhu@utsa.edu www.ics.utsa.edu www.cspecc.utsa.edu www.profsandhu.com World-Leading Research with Real-World Impact!

ICS Mission and History Sustained excellence in graduate-level sponsored research 2012-2017 Graduated to a self-sustaining operation 2007-2012 Founded by start-up funding from State of Texas 2017-2022 Major expansion by winning NSF C-SPECC grant In collaboration with: College of Engineering College of Business College of Education Open Cloud Institute Cyber Center for Security & Analytics Situated in the College of Science, Department of Computer Science Established world class laboratories for: Secure cloud computing and Malware research © Ravi Sandhu World-Leading Research with Real-World Impact!

Natural vs Cyber Science Elephant Problem Cyber-Elephant Problem The cyber-elephant problem requires Applied and Basic research Combined (ABC) * The New ABCs of Research, Ben Schneiderman, 2016 © Ravi Sandhu World-Leading Research with Real-World Impact!

ICS Major Research Areas SECURITY TECHNOLOGIES Access Control Policy Malware Detection and Forensics Security Dynamics APPLICATION DOMAINS Cloud Computing Internet of Things (IoT) Social Networks Enterprise Goal: Broaden and Deepen © Ravi Sandhu World-Leading Research with Real-World Impact!

Cyber Security Landscape Objectives POLICY ATTACKS What? Why? Enforce Enable Defend Respond PROTECT DETECT Complement How? Mechanisms © Ravi Sandhu World-Leading Research with Real-World Impact!

Cyber Security Landscape Objectives POLICY ATTACKS What? Why? Enforce Enable Defend Respond Access Control PROTECT DETECT Complement How? Mechanisms © Ravi Sandhu World-Leading Research with Real-World Impact!

Cyber Security Landscape Objectives POLICY ATTACKS What? Why? Enforce Enable Defend Respond Access Control PROTECT DETECT Complement How? Mechanisms © Ravi Sandhu World-Leading Research with Real-World Impact!

Access Control Evolution Fixed policy Discretionary Access Control (DAC), 1970 Mandatory Access Control (MAC), 1970 Role Based Access Control (RBAC), 1995 Attribute Based Access Control (ABAC), ???? Flexible policy Born 1990s © Ravi Sandhu World-Leading Research with Real-World Impact!

ABAC Research Space 7. ABAC Design, Engineering and Applications 5. ABAC Policy Architectures and Languages 2. Core ABAC Models 3. Administrative ABAC Models 4. Extended 6. ABAC Enforcement Architectures 1. Foundational Principles and Theory © Ravi Sandhu World-Leading Research with Real-World Impact!

Core ABAC Models: ABACα Can be configured to do simple forms of DAC, MAC, RBAC (Jin, Krishnan, Sandhu 2012) © Ravi Sandhu World-Leading Research with Real-World Impact!

Core ABAC Models: ABACα Policy Configuration Points Can be configured to do simple forms of DAC, MAC, RBAC (Jin, Krishnan, Sandhu 2012) © Ravi Sandhu World-Leading Research with Real-World Impact!

Core ABAC Models: ABACβ Can further be configured to do many RBAC extensions (Jin, Krishnan, Sandhu 2014) © Ravi Sandhu World-Leading Research with Real-World Impact!

Administrative ABAC Models: HGABAC Hierarchical Group and Attribute Based Access Control (HGABAC) Introduces User and Object Groups Simplifies administration of attributes Servos and Osborn, 2015 © Ravi Sandhu World-Leading Research with Real-World Impact!

ABAC Applications: Cloud Enabled IoT Alsheri, Bhatt, Patwa, Benson, Sandhu 2016 onwards © Ravi Sandhu World-Leading Research with Real-World Impact!

Policy Architecture: Amazon AWS style © Ravi Sandhu World-Leading Research with Real-World Impact!

ABAC Research Space * * * * 7. ABAC Design, Engineering and Applications 5. ABAC Policy Architectures and Languages * 2. Core ABAC Models 3. Administrative ABAC Models 4. Extended 6. ABAC Enforcement Architectures * * 1. Foundational Principles and Theory © Ravi Sandhu World-Leading Research with Real-World Impact!

Extended ABAC Models: ReBAC versus ABAC ReBAC and ABAC are not that different (Tahmina, Sandhu 2017) © Ravi Sandhu World-Leading Research with Real-World Impact!

ABAC Enforcement Architecture: Federated ABAC Fisher 2015 NCCOE, NIST, Building Block © Ravi Sandhu World-Leading Research with Real-World Impact!

Foundations: Safety Analysis Discretionary Access Control (DAC), 1970 Mandatory Access Control (MAC), 1970 Role Based Access Control (RBAC), 1995 Attribute Based Access Control (ABAC), ???? Can subject s obtain a right r on object o? Current state? Some future state? Safety Complexity Ahmed, Rajkumar, Sandhu 2016 onwards © Ravi Sandhu World-Leading Research with Real-World Impact!