1 The Future of Access Control: Attributes, Automation and Adaptation Prof. Ravi Sandhu Executive...

The Future of Access Control:Attributes, Automation and Adaptation

Prof. Ravi SandhuExecutive Director and Endowed Chair

S&P SymposiumIIT Kanpur

March 1, 2013

ravi.sandhu@utsa.eduwww.profsandhu.com

www.ics.utsa.edu

Institute for Cyber Security

Cyberspace will become orders of magnitude more complex and confused very quickly

Overall this is a very positive development and will enrich human society

It will be messy but need not be chaotic!

Cyber security research and practice are loosing ground

Prognosis: Cyberspace

Most cyber security thinking is microsec Most big cyber security threats are macrosec

MicrosecRetail attacks vs Targeted attacks 99% of the attacks are thwarted by basic hygiene and some

luck1% of the attacks are difficult and expensive, even

impossible, to defend or detect

Rational microsec behavior can result in highly vulnerable macrosec

Microsec vs Macrosec

Enable system designers and operators to say:

This system is secure

There is an infinite supply of low-hanging attacks

Cyber Security Goal

Not attainable

Enable system designers and operators to say:

This system is secure enough

Mass scale, not very high assurance ATM network On-line banking E-commerce

One of a kind, extremely high assurance US President’s nuclear football

Cyber Security Goal

Many successful examples

Our successes are not studied as success stories

Our successes are not attainable via current cyber security science, engineering, doctrine

Cyber Security Paradox

Cyber Security

Cyber Security is all about tradeoffs and adjustments automation (in future)

Productivity Security

Let’s build itCash out the benefitsNext generation can secure it

Let’s not build itLet’s bake in super-security tomake it unusable/unaffordableLet’s sell unproven solutions

There is a sweet spot in the middleWe don’t know how to predictably find it

and maintain position there

Prognosis: Access Control

Discretionary Access Control (DAC), 1970

Mandatory Access Control (MAC), 1970

Role Based Access Control (RBAC), 1995

Attribute Based Access Control (ABAC), ????

Fixedpolicy

Flexiblepolicy

HumanDriven

AutomatedAdaptive

Messy or Chaotic?

Cyber Security Technologies

AUTHENTICATION

INTRUSIONDETECTION AND AUDIT

CRYPTOGRAPHYACCESS

CONTROL

ASSURANCE

RISKANALYSIS

SECURITY ENGINEERING& MANAGEMENT

Analog Hole Inference Covert Channels Side Channels Phishing Safety Usability Privacy Attack Asymmetry Compatibility Federation ….

Access Control Limitations

Analog Hole Inference Covert Channels Side Channels Phishing Safety Usability Privacy Attack Asymmetry Compatibility Federation ….

Access Control Limitations

Can manage Cannot eliminate

Discretionary Access Control (DAC), 1970 Owner controls access But only to the original, not to copies Grounded in pre-computer policies of researchers

Mandatory Access Control (MAC), 1970 Synonymous to Lattice-Based Access Control (LBAC) Access based on security labels Labels propagate to copies Grounded in pre-computer military and national security policies

Role-Based Access Control (RBAC), 1995 Access based on roles Can be configured to do DAC or MAC Grounded in pre-computer enterprise policies

Access Control Models

Numerous other models but only 3 successes: SO FAR

The RBAC Story

2nd expansion phase1st expansion phase

1995 2000 2005 2008

Amount ofPublications

Year of Publication

28 30 30 35 40 48 53 88 85 88 112 103 111 866

3 2 7 3

Pre-RBAC Early RBAC

RBAC96model

NIST-ANSIStandard Proposed

NIST-ANSIStandardAdopted

17World-Leading Research with Real-World Impact!

RBAC96 Model

Constraints

Fundamental Theorem of RBAC

RBAC can be configured to do MAC

RBAC can be configured to do DAC

RBAC is policy neutralRBAC is neither MAC nor DAC!

Role granularity is not adequate leading to role explosion Researchers have suggested several extensions such as parameterized

privileges, role templates, parameterized roles (1997-) Role design and engineering is difficult and expensive

Substantial research on role engineering top down or bottom up (1996-), and on role mining (2003-)

Assignment of users/permissions to roles is cumbersome Researchers have investigated decentralized administration (1997-),

attribute-based implicit user-role assignment (2002-), role-delegation (2000-), role-based trust management (2003-), attribute-based implicit permission-role assignment (2012-)

Adjustment based on local/global situational factors is difficult Temporal (2001-) and spatial (2005-) extensions to RBAC proposed

RBAC does not offer an extension framework Every shortcoming seems to need a custom extension Can ABAC unify these extensions in a common open-ended framework?

RBAC Shortcomings

RBAC Policy Configuration Points

Constraints

Security Architect

Security Administrator

Security Architect

Security Administrator

SecurityArchitect

PolicySpecification

PolicyReality

PolicyEnforcement

PolicyAdministration

PolicySpecification

PolicyReality

PolicyEnforcement

PolicyAdministration

MAC, DACfocus

RBAC, ABACInitial focus

Attributes are name:value pairs possibly chained values can be complex data structures

Associated with users subjects objects contexts

device, connection, location, environment, system … Converted by policies into rights just in time

policies specified by security architects attributes maintained by security administrators ordinary users morph into architects and administrators

Attribute-Based Access Control (ABAC)

ABAC Status

2nd expansion phase1st expansion phase

1995 2000 2005 2008

Amount ofPublications

Year of Publication

28 30 30 35 40 48 53 88 85 88 112 103 111 866

3 2 7 3

Pre-RBAC Early RBAC

RBAC96paper

ProposedStandard

StandardAdopted

ABAC still in pre/early phase

1990? 2012

X.509, SPKI Attribute Certificates (1999 onwards) IETF RFCs and drafts Tightly coupled with PKI (Public-Key Infrastructure)

XACML (2003 onwards) OASIS standard Narrowly focused on particular policy combination issues Fails to accommodate the ANSI-NIST RBAC standard model Fails to address user subject mapping

Usage Control or UCON (Park-Sandhu 2004) Fails to address user subject mapping Focus is on extended features

Mutable attributes Continuous enforcement Obligations Conditions

Several others ………..

ABAC Prior Work Includes

An ABAC model requires identification of policy configuration points (PCPs) languages and formalisms for each PCP

A core set of PCPs can be discovered by building the ABACα model to unify DAC, MAC and RBAC

Additional ABAC models can then be developed by increasing the sophistication of the ABACα PCPsdiscovering additional PCPs driven by requirements beyond

DAC, MAC and RBAC

ABACα Hypothesis (DBSEC 2012)

A small but crucial step

ABACα Model Structure

Policy Configuration Points

ABACα Model Structure

Policy Configuration Points

Can be configured to do DAC, MAC, RBAC

Rights to attributes Rights Labels Roles Attributes

Authorization Leap

Benefits Decentralized Dynamic Contextual Consolidated

Risks Complexity Confusion Attribute trust Policy trust

Messy Chaotic??

Attributes Automated Adaptive

Managed but not solved

Prognosis: Cyber Security

Attributes Automated Adaptive

Managed but not solved

Prognosis: Cyber Security

Cyber Security Research at ICS

FoundationsAttribute based access control

Relationship based access controlMalware models

ApplicationsSecure information sharingSocial networks security and privacySecure data provenanceContent delivery networksSmart grid

TechnologyCloud computing securitySoftware defined networksBotnets

1 The Future of Access Control: Attributes, Automation and Adaptation Prof. Ravi Sandhu Executive...

Documents

1 Challenges of Cyber Security Education at the Graduate Level Ravi Sandhu Executive Director and Endowed Professor Nov. 9, 2012 ravi.sandhu@utsa.edu

1 An Attribute Based Framework for Risk-Adaptive Access Control Models Ravi Sandhu Executive Director and Endowed Professor August 2011 ravi.sandhu@utsa.edu

1 Cyber Security Research: A Personal Perspective Prof. Ravi Sandhu Executive Director and Endowed Chair January 18, 2013 ravi.sandhu@utsa.edu

INSTITUTE FOR CYBER SECURITY 1 The ASCAA * Principles Applied to Usage Control Prof. Ravi Sandhu Executive Director and Endowed Chair Institute for Cyber

Prof. Ravi Sandhu Executive Director and Endowed Chair · OpenStack: industry backed opensource consortium (Rackspace genesis) Joyent: SmartOS based SaaS: SalesForce, CRM (Customer

INSTITUTE FOR CYBER SECURITY © Ravi Sandhu11 Group-Centric Information Sharing Ravi Sandhu Executive Director and Endowed Professor Institute for Cyber

1 Privacy Preserving Data Publishing Prof. Ravi Sandhu Executive Director and Endowed Chair March 29, 2013 ravi.sandhu@utsa.edu © Ravi

1 Grand Challenges in Authorization Systems Prof. Ravi Sandhu Executive Director and Endowed Chair November 14, 2011 ravi.sandhu@utsa.edu

1 PANEL Solving the Access Control Puzzle: Finding the Pieces and Putting Them Together Ravi Sandhu Executive Director Endowed Professor June 2010 ravi.sandhu@utsa.edu

INSTITUTE FOR CYBER SECURITY 1 Application-Centric Security Models Prof. Ravi Sandhu Executive Director and Endowed Chair Institute for Cyber Security

Access Control and Semantic Web Technologies Ravi Sandhu Executive Director and Endowed Chair

uppbpb.gov.inuppbpb.gov.in/Result_HC/KANPUR20141110_12341621.pdfKANPUR DEHAT {(RAMABAI NAGAR) KANPUR NAGAR KANPUR NAGAR KANPUR NAGAR KANPUR NAGAR KANPUR NAGAR KANPUR NAGAR KANPUR NAGAR

1 Institute for Cyber Security Prof. Ravi Sandhu Executive Director and Endowed Chair February 4, 2015 ravi.sandhu@utsa.edu

Prof. Ravi Sandhu Executive Director and Endowed Chair · Anomaly Based Limitations. Nwokedi Idika and Aditya Mathur, A Survey of Malware Detection Techniques, Purdue University,

INSTITUTE FOR CYBER SECURITY 1 Trusted Computing Models Prof. Ravi Sandhu Executive Director and Endowed Chair Institute for Cyber Security University

INSTITUTE FOR CYBER SECURITY 1 Access Control Prof. Ravi Sandhu Executive Director and Endowed Chair Institute for Cyber Security University of Texas at

INSTITUTE FOR CYBER SECURITY 1 Cyber Security: Past, Present and Future Prof. Ravi Sandhu Executive Director and Endowed Chair Institute for Cyber Security

1 Group-Centric Models for Secure Information Sharing Prof. Ravi Sandhu Executive Director and Endowed Chair March 30, 2012 ravi.sandhu@utsa.edu

INSTITUTE FOR CYBER SECURITY 1 A Perspective on Usage Control and its Future Prof. Ravi Sandhu Executive Director and Endowed Chair Institute for Cyber

Prof. Ravi Sandhu Executive Director and Endowed …profsandhu.com/cs5323_s17/L1.pdf1 Introduction and Basic Concepts Prof. Ravi Sandhu Executive Director and Endowed Chair Lecture