1 1 World-Leading Research with Real-World Impact! Prosunjit Biswas, Ravi Sandhu and Ram Krishnan University of Texas at San Antonio Institute for Cyber Security 1 st Workshop on Attribute Based Access Control (ABAC 2016) Label-Based Access Control: An ABAC Model with Enumerated Authorization Policy
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Enumerated authorization policy ABAC (EP-ABAC) model
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1 1 World-Leading Research with Real-World Impact!
Prosunjit Biswas, Ravi Sandhu and Ram Krishnan University of Texas at San Antonio
Institute for Cyber Security
1st Workshop on Attribute Based Access Control (ABAC 2016)
Label-Based Access Control: An ABAC Model with Enumerated Authorization Policy
2 2 World-Leading Research with Real-World Impact!
Outline
Summary
Background & motivation
Enumerated authorization policy ABAC model
Relationship with existing models
Expressive power of LaBAC
Conclusion
3 3 World-Leading Research with Real-World Impact!
Summary
We present an enumerated authorization policy ABAC
model and understand its relationship with traditional
access control models.
Background and Motivation
5 5 World-Leading Research with Real-World Impact!
authorization policy
• Boolean expression
• E.g.: age(u)>18
• Models: ABACα, HGABAC
• Set of tuples
• {(age(u),19), (age(u),20), ….
(age(u),100)} [assuming range
upper bound <=100]
• Models: Policy Machine, 2-
sorted-RBAC
6 6 World-Leading Research with Real-World Impact!
Logical-formula Auth. Policy
Many ways to set up a policy - Authread (Authread allows manager to read TS objects from home or office).
7 7 World-Leading Research with Real-World Impact!
Logical-formula Auth. Policy
Update Authread so that manager can no longer read TS objects from home
8 8 World-Leading Research with Real-World Impact!
Enumerated Auth. Policy
Authread ≡ {(mng, home, TS), (mng,office,TS)}
Auth`read ≡ { (mng, home, TS), (mng,office,TS)}
9 9 World-Leading Research with Real-World Impact!