Transcript Intelligent Data Fusion and Error Reduction for Sensor Networks

Cyber Security Research at AUB
Imad H. Elhajj
American University of Beirut
Electrical and Computer Engineering
[email protected]
ITU-T Study Group 17
February 2012
AUB Department of Electrical and Computer Engineering
Macro
AUB Department of Electrical and Computer Engineering
Macro
AUB Department of Electrical and Computer Engineering
Micro
AUB Department of Electrical and Computer Engineering
Nano
AUB Department of Electrical and Computer Engineering
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Play
Offices
& Lab
AUB Department of Electrical and Computer Engineering
AUB (Founded in 1866)
AUB Department of Electrical and Computer Engineering
Electrical and Computer Engineering
AUB
 7,500 students
 73-acre Campus
ECE
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620 Undergraduate students
50 Graduate students
26 Full-time faculty members
Opportunities for graduate students and
collaboration
AUB Department of Electrical and Computer Engineering
Security Group At AUB
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Dr. Ayman Kayssi
Dr. Ali Chehab
Dr. Imad Elhajj
3 PhD Students
12 MS Students
10 Undergraduate Students
AUB Department of Electrical and Computer Engineering
Areas of Research
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Wireless mobile networks
Energy aware
Internet
Industrial
Cloud
Misc: VANETs, RFID, wireless sensor
networks, body sensor networks
AUB Department of Electrical and Computer Engineering
Research Relevance to ITU-T SG17 Questions
QUESTIONS
TITLE
Q 1/17
Telecommunications systems security project
Q 4/17
Cybersecurity
Q 6/17
Security aspects of ubiquitous telecommunication
services
Q 7/17
Secure application services
Q 8/17
Service oriented architecture security
Q 10/17
Identity management architecture and mechanisms
Q 11/17
Directory services, Directory systems, and publickey/attribute certificates
AUB Department of Electrical and Computer Engineering
Wireless Mobile Network Security
AUB Department of Electrical and Computer Engineering
Wireless Signaling: Vulnerabilities, Detection and Mitigation
TELUS corporation funded research
AUB Department of Electrical and Computer Engineering
Signaling
AUB Department of Electrical and Computer Engineering
Signaling Research
1) Developing a detection algorithm for
unusual signaling activities originating
from a wireless device
2) Devising granular mitigation techniques
3) Effects of signaling on the backbone
AUB Department of Electrical and Computer Engineering
Energy Aware
AUB Department of Electrical and Computer Engineering
Security Using Mobile Devices
• Security functions are energy consuming
• Human perception limitations reduce security
requirements
• “the quick brown fox jumped over the lazy
dog” requires 44 bytes of storage capacity in
textual format
• Same sentence requires 3000 bytes of data
when it is spoken and encoded by G.729
encoder
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Audio Experiment
AUB Department of Electrical and Computer Engineering
G.711
E3VoIP2 N=15
Average N=15
SRTP
0.3
milliseconds
0.25
0.2
0.15
0.1
0.05
0
0
10
20
30
40
Packets
AUB Department of Electrical and Computer Engineering
50
60
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Internet Security
AUB Department of Electrical and Computer Engineering
IP Spoofing Detection
Round Trip Time to Improve Hop Count Filtering
AUB Department of Electrical and Computer Engineering
Thwarting Cache Poisoning Attacks in DNS
 Decrease the success probability of DNS spoofing and
cache poisoning by preventing man-in-the-middle
attacks
 Provide a backward compatible and simple security
solution with low computation and communication
overhead
 Target the different DNS query interaction models
 Employ an efficient Identity-Based Encryption key
management scheme that relieves the different DNS
interacting entities from the burden and complexities
of traditional public-key infrastructures
AUB Department of Electrical and Computer Engineering
Secure Delay-Tolerant Communications in the
Presence of Oppressive Governments
 Develop a secure delay-tolerant network system
– Enable citizens to communicate freely in an
environment where public communication methods,
are intercepted and used by the authorities to
monitor civilian activities.
 The proposed system is composed of several
disconnected zones
– Data marshals between private key generators and
normal nodes in different zones
– Uses mobile gateway nodes that carry messages
between the different zones
AUB Department of Electrical and Computer Engineering
DTN Network Model
CELL1
PKG1
Data Broadcast
CELL2
Mobile
Gateway
PKG2
CELL3
PKG3
Mobile
Gateway
Data Broadcast
AUB Department of Electrical and Computer Engineering
Industrial Security
AUB Department of Electrical and Computer Engineering
Automation and BMS
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Stuxnet
PLC and SCADA vulnerabilities
BMS vulnerabilities
Industrial IDS
AUB Department of Electrical and Computer Engineering
Security in Cloud Computing
AUB Department of Electrical and Computer Engineering
Hardware-based Security for Ensuring Data Privacy
in the Cloud
• A set of hardware-based security mechanisms for ensuring
the privacy, integrity, and legal compliance of customer
data as it is stored and processed in the cloud.
• Leverage the tamper-proof capabilities of cryptographic
coprocessors to establish a secure execution domain in the
computing cloud that is physically and logically protected
from unauthorized access.
• Provide a privacy feedback protocol to inform users of the
different privacy operations applied on their data and to
make them aware of any data leaks or risks that may
jeopardize the confidentiality of their sensitive information.
AUB Department of Electrical and Computer Engineering
PasS system and interaction model
CSP
Cloud Customer
Services Layer
Privacy categorized data and software
Output results and privacy feedback
Cu
om
st
re
so
rs
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TTP
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Crypto Coprocessor
Physical Hardware
Virtual Machine
Storage Facility
AUB Department of Electrical and Computer Engineering
Co
tio
pr
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Cloud Service Provider (CSP)
Configured Crypto
Trusted Third Party (TTP)
Virtual Machine using a Crypto
Coprocessor
Reputation as a Service
• RaaS is a secure and accountable reputation system for ranking
service providers in cloud computing architectures.
• Secure audit logging provides a reputation reporting system
whose results and recommendations can be published as a
service and verified by trusted third parties or by the cloud service
providers themselves.
• Ranking criteria:
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Performance
Quality of service measures
Security
Pricing
• RaaS provides verifiable and accountable compliance with
service-level agreements and regulatory policies
• RaaS is implemented in a real cloud computing architecture
using the VMware vSphere 4 cloud operating system.
– Imposes minimal overhead on the overall system performance
AUB Department of Electrical and Computer Engineering
The Bulk Data Fetch Protocol
Cloud Provider
Cloud Storage Facility
Application
Servers
(1)
(2)
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(12)
(10)
(7)
(3)
(8) (6)
(4)
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Cloud Customer
(1) Resource Query + Authentication Info.
(3) Resource Query
(5) Requested Resource Data
(7) Set t2, Verify Hash
(9) Send Resource Data to Customer
(11) Validate commitment hash
(2) Authenticate Query and Set t1
(4) Fetch Data from Cloud Storage
(6) Send Hash(Resource Data)
(8) Authorization Signal
(10) Send Hash(Resource Data)
(12) Generate Secure Log Entry
AUB Department of Electrical and Computer Engineering
SNUAGE
• Platform-as-a-service security framework for
building secure and scalable multi-layered services
based on the cloud computing model.
• SNUAGE ensures the authenticity, integrity, and
confidentiality of data communication over the
network links by creating a set of security
associations between the data-bound components
on the presentation layer and their respective data
sources on the data persistence layer.
• Implementation using Java and deployed and tested
in a real cloud computing infrastructure using the
Google App Engine service platform.
AUB Department of Electrical and Computer Engineering
BGP-Inspired Autonomic Service Routing for the Cloud
• ServBGP: a service routing protocol for managing service
collaboration among cloud providers in cloud computing.
• Based on the policy-driven design of the well-known BGP
Internet routing
• Autonomously manage the different aspects of service
interaction and collaboration among service providers from
service discovery and advertisement to service
consumption and revocation.
• ServBGP routing decision engine is planned to operate by
processing cost-bidding and QoS advertisement messages
from the different cloud providers.
• Implemented on Google, Amazon, and Microsoft clouds
AUB Department of Electrical and Computer Engineering
ServBGP System Architecture
Service Router
Service Request
In
RR
Service Request
Out
SIB
CSP6
CSP2
CSP3
CSP1
CSP7
Cloud Customer
CSP4
CSP5
Cloud Service Provider (CSP)
ServBGP Information Base
Reputation Repository (RR)
Service Router
ServBGP Service Advertisment
Service Reputation Scores
AUB Department of Electrical and Computer Engineering
Mobile Cloud Computing
 Set of policy-driven security protocols for ensuring the
confidentiality and integrity of enterprise data in mobile
cloud computing environments.
 Offloading the intensive asymmetric key agreement
mechanisms from the mobile
 Designing a customizable policy-based security
architecture that considers the sensitivity of cloud data to
provide multi-level and fine-grained data protection
methodologies that suit the energy-limited mobile devices
and the low-bandwidth wireless networks characterizing
current mobile cloud computing models.
 The system is implemented in a real cloud computing
environment and the savings in terms of energy
consumption and execution time are analyzed.
AUB Department of Electrical and Computer Engineering
VANETs, RFID, wireless sensor networks,
body sensor networks
AUB Department of Electrical and Computer Engineering
Keyless Authentication of Position and Velocity for
VANETs
AUB Department of Electrical and Computer Engineering
A Privacy-Preserving Trust Model for VANETs
 A trust-based privacy-preserving model for VANETs.
 The model is unique in its ability to protect privacy
while maintaining accurate reputation-based trust.
 We use the notion of groups in order to make the
VANET users anonymous within their groups and
yet identifiable and accountable to their group
managers.
 The use of groups simplifies the task of building
reputation and calculating trust in the received
messages in order to provide better and more
confident decisions.
 Simulations verify correctness and reliability
AUB Department of Electrical and Computer Engineering
A PUF-Based Ultra-Lightweight Mutual-Authentication
RFID Protocol
 A novel approach to achieve mutual
authentication for ultra-lightweight tags is
proposed using Physically Unclonable
Functions (PUFs).
 Provide robust security properties as
well as good performance for limited
tags
AUB Department of Electrical and Computer Engineering
TRACE: A Centralized Trust and Competence-Based EnergyEfficient Routing Scheme for Wireless Sensor Networks
 Protect wireless sensor networks from various attacks and
misbehaving nodes.
 TRACE identifies different types of bad nodes that can
affect the correct routing operation and the reliability of the
message delivery to the sink base station.
 Sink BS processes and validates the information received
from the sensor nodes and calculates the maliciousness,
competence, and cooperation levels of each node.
 The sink BS calculates trust values for each.
 TRACE accounts for the energy requirements of the
severely-constrained network nodes by detecting and
isolating the bad nodes while eliminating the powerconsuming reputation inquiries and computations required
by each node in a distributed approach.
AUB Department of Electrical and Computer Engineering
A Decentralized Energy-Aware Key Management
Scheme for Wireless Sensor Networks
• WSN nodes are limited in terms of processing capabilities and
battery life.
– Encryption is usually avoided and the readings are sent in the clear.
– Lightweight encryption techniques are proposed to overcome the
limitations of sensor nodes.
• Identity-based encryption (IBE) that uses elliptic curve cryptography (ECC)
seems to be very promising in terms of energy efficiency.
• We propose a novel decentralized IBE-based key management
scheme that reduces the energy by using multiple base stations.
• The keys are pre-distributed in the WSN and refreshed at specific
time intervals.
• The system ensures confidentiality of the messages and the
availability of WSN service even when multiple nodes and base
stations are compromised, at a significant reduction in overall
system energy.
AUB Department of Electrical and Computer Engineering
Security and Privacy in Body Sensor Networks
 Study two main challenges in the body sensor
network security and privacy context
– Achieving the correct balance between the
complexity of the protocol security operations
employed and the energy consumption they incur
– Attaining the right tradeoff between privacy and
safety by utilizing the patient’s vital signals and
other context-related information to minimize the
amount of private data released
 We present a blueprint body sensor network
security framework
AUB Department of Electrical and Computer Engineering
Typical Body Sensor Network Architecture
BSN Controller
Internet/
Intranet
Base Station
Hospital Servers
Body Sensor Node
Wireless Link
Wired Link
AUB Department of Electrical and Computer Engineering
Courses
AUB Department of Electrical and Computer Engineering
Graduate Courses Offered
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Cryptography and Computer Security
Internet Security
Wireless Security
Information Security Management
Network and Computer Security
Laboratory
AUB Department of Electrical and Computer Engineering
Laboratory Description
This laboratory addresses advanced
network and computer security topics.
Experiments include the execution of
attacks, the setup of intrusion detection
and prevention, securing computers and
wired and wireless networks, and digital
forensics.
AUB Department of Electrical and Computer Engineering
Topics Covered
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Section 1 — Networking Basics - How do networks work?
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Section 2 — Vulnerabilities and Threats - How can networks be compromised?
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Lab 2: Scanning and Enumerating the Network for Targets and Address Spoofing
Lab 3: Denial of Service Attacks and Network Applications Exploits
Lab 4: Malware Analysis and Botnets
Lab 5: Escalating Privilege – Sniffing, Keylogging, Password Cracking and Man in the
Middle Attacks
Lab 6: Security in Wireless Systems
Section 3 — Prevention - How do we prevent harm to the networks?
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Lab 1: Security Lab Setup and Networking Basics
Lab 7: Firewalls
Lab 8: Hardening the Host Computer and Securing Network Communications
Section 4 — Detection and Response – How do we detect and respond to
attacks?
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Lab 9: Preparing for and Detecting Attacks
Lab 10: Identify and Mitigate Network Attacks
Lab 11: Digital Forensics
AUB Department of Electrical and Computer Engineering
Lab Overall Diagram
AUB Department of Electrical and Computer Engineering
Lab Group Diagram
AUB Department of Electrical and Computer Engineering
Cabinets
Juniper IPS
AUB Department of Electrical and Computer Engineering
Photos
AUB Department of Electrical and Computer Engineering
Photos
AUB Department of Electrical and Computer Engineering
Potential Uses
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Customized training for industry
Testing and benchmarking of equipment
Vendor demonstrations
Lab could potentially be virtualized to
duplicate at low cost
AUB Department of Electrical and Computer Engineering
ITU Resolutions Relevant to AUB Collaboration
 ITU Plenipotentiary Resolution 130: Strengthening the role of ITU
in building confidence and security in the use of information and
communication technologies (Guadalajara, 2010)
 ITU WTDC Resolution 45: Mechanisms for enhancing
cooperation on cybersecurity, including combating spam
(Hyderabad, 2010)
 ITU WTDC Resolution 69: Creation of national computer incident
response teams, particularly for developing countries, and
cooperation between them (Hyderabad, 2010)
 ITU WTSA Resolution 58: Encourage the creation of national
computer incident response teams, particularly for developing
countries (Johannesburg, 2008)
 UN Resolutions 57/239 (2002) and 58/199 (2004): Creation of a
global culture of cybersecurity and the protection of critical
information infrastructures
AUB Department of Electrical and Computer Engineering
Potential Collaboration
 Research projects
 Test lab for ITU-T standards conformance
 Contributions to standards (ITU-T SG17).
Several of the questions for Study Group 17
are areas of research at AUB
 Organizing events (workshops, seminars)
 Capacity building and Awareness
 Help establish CERT (AUB Member of the
PAN Arab Cyber Security Observatory)
AUB Department of Electrical and Computer Engineering
Thank you
[email protected]
AUB Department of Electrical and Computer Engineering