CIT 480: Securing Computer Systems. Authentication
|
|
- Amy Powell
- 5 years ago
- Views:
Transcription
1 CIT 480: Securing Computer Systems Authentication
2 Topics 1. Digital Identity and Groups 2. Authentication 3. Formal Definition 4. Authentication Types 5. Tokens 6. Biometrics 7. UNIX Authentication
3 Digital Identity A digital identity is data that uniquely describes a subject, which may be a person, process, or machine. Personal Identities Username User ID address Machine Identities Inventory number IP address SSL certificate
4 Groups and Roles Definitions A group is a set of users. A role is a set of users with a common task. In practice, little difference on most systems. Purpose Groups simplify access control by reducing the number of subjects.
5 Authentication Authentication is the act of verifying than an entity is who or what they claim they are. Authentication can be based on 1. What the entity knows (e.g., passwords) 2. What the entity has (e.g., access card) 3. What the entity is (e.g., fingerprints) Or a combination of two or more of 1..3, which is known as Multi Factor Authentication (MFA).
6 Importance of Authentication Access Control Most systems base access rights on identity of principal executing the process. Accountability Logging and auditing functions. Need to track identity across account/role changes (e.g., su, sudo).
7 Authentication System A: set of authentication information information used by entities to prove identity C: set of complementary information information stored by system to validate A F: set of complementation functions f : A C generate C from A L: set of authentication functions l: A C {T,F} verify identity S: set of selection functions enable entity to create or alter A or C
8 What You Know (Passwords) Example: Authenticate with 8-character alphanumeric password. System compares against stored MD5 hash. A = [A-Za-z0-9]{8} C = 22-char Base64 strings F = { MD5 } L = { MD5(A)==C }
9 What You Have (Tokens) Disconnected tokens Connected tokens Wireless Smart cards RFID used for toll collection Online banking Digipass
10 Token Information Types Static Password Token: contain a physically hidden password that is transmitted for each authentication. Example: car keys. Synchronous Dynamic Token: Password changes every N seconds. Time synchronized with server. Asynchronous Dynamic Token: One-time password generated algorithmically. Challenge-Response Token: Server sends random challenge to token; device computes response with a cryptographic algorithm.
11 RFID Radio Frequency Identification Types of Tags Passive: use power from reader signal Active: internal power source Applications Product tracking (EPC barcode replacement) Transportation payment Automotive (embedded in car keys) Passports Human implants EPC RFID Tag
12 What You Are (Biometrics) Identification by human characteristics: 1. Physiological 2. Behavioral A biometric characteristic should be: 1. universal: everyone should have it 2. unique: no two people should share it 3. permanent: it should not change with time 4. quantifiable: it must be practically measurable
13 Biometric System Example: User authenticates with fingerprint. System compares to stored fingerprint template. A = { user fingerprints } C = { digital fingerprint templates } F = { scanner + analog->digital } L = { tunable similarity function }
14 How Biometrics Work
15 Types of Biometrics
16 Fingerprints Capacitive measurement, using differences in electrical charges of whorls on finger to detect those parts touching chip and those raised.
17 Eye Biometrics Iris Scan Lowest false accept/reject rates of any biometric. Person must hold head still and look into camera. Retinal Scan Cataracts and pregnancy change retina pattern. Lower false accept/reject rates than fingerprints. Intrusive and slow.
18 Measurement Outcomes Actual Identity Valid User Adversary Biometric Measurement Valid User Adversary True Positive False Positive False Negative True Negative
19 False Positive/Negative Tradeoff Errors False Negative Rate False Positive Rate Sensitivity
20 Biometrics can be compromised. Unique identifiers, not secrets. You can change a password. You can t change your iris scan. Examples: You leave your fingerprints every place. It s easy to take a picture of your face. Other compromises. Use faux ATM-style devices to collect biometrics. Obtain all biometric templates from server.
21 UNIX Authentication UNIX identifies user with a UID Username is for humans, UID for computers. 15-bit to 32-bit unsigned integer. UID=0 is the superuser, root. Identity and authentication data stored in /etc/passwd /etc/shadow /etc/group
22 /etc/{passwd,shadow} Central file(s) describing UNIX user accounts. /etc/passwd Username UID Default GID GCOS Home directory Login shell /etc/shadow Username Encrypted password Date of last pw change. Days til change allowed. Days `til change required. Expiration warning time. Expiration date. student:x:1000:1000:example User,1212:/home/student:/bin/bash student:$1$w/uuktlf$otssvxtsn/xjzuogfelnz0:13226:0:99999:7:::
23 Groups and GIDs GIDs are 32-bit non-negative integers. Each user has a default GID. File group ownership set to default GID. Temporarily change default GID: newgrp. Groups are described in /etc/group Users may belong to multiple groups. Format: group name, pw, GID, user list. wheel:x:10:root,waldenj,bergs
24 Superuser Powers Superuser can Read any file. Modify any file. Add / remove users. Become any user. Kill any process. Reprioritize processes. Configure network. Set date/time. Shutdown / reboot. Superuser can t Change read-only filesystem. Decrypt hashed passwords. Modify NFS-mounted filesystems. Read or modify SELinux protected files.
25 Switching Users with su > id uid=102(wj) gid=102(wj) groups=102(wj) > su Password: # id uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm) # su john john$ id uid=1995(john) gid=1995(john) groups=1995(john) john$ exit # exit > id uid=102(wj) gid=102(wj) groups=102(wj)
26 Real and Effective UIDs Real UID The UID matching the username you logged in as. Effective UID The UID that is checked for access control. The su command changes your EUID. SETUID programs A SETUID program executes with an EUID of the owner of the program instead of yours. /usr/bin/passwd is SUID root. Why?
27 Key Points 1. Access control and audit are based on identity. 2. Authentication consists of an entity, the user, attempting to convince another entity, the verifier, of the user s identity 1. something you know (passwords) 2. something you have (tokens) 3. something you are (biometrics) 4. somewhere you are (location) 3. UNIX authentication Usernames, UIDs, groups, GIDs Storage: /etc/{passwd,shadow} and /etc/group Real and effective UIDs SETUID mechanism
28 References 1. Ross Anderson, Security Engineering, 2 nd edition, Wiley, Matt Bishop, Introduction to Computer Security, Addison-Wesley, DigitalPersona, Simson Garfinkel, Gene Spafford, and Alan Schwartz, Practical UNIX and Internet Security, 3 rd Edition, O Reilly, Ben Mook, Md. pilot program tracks drivers speed, location via cell phones, The Daily Record, October 21, 2005, 6. Bruce Schneier, Biometrics: Truths and Fictions, Cryptogram, Bruce Schneier, The Curse of the Secret Question, Orville Wilson, Privacy & Identity - Security and Usability: The viability of Passwords & Biometrics,
29 Released under CC BY-SA 3.0 This presentation is released under the Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0) license You are free: to Share to copy and redistribute the material in any medium to Adapt to remix, build, and transform upon the material to use part or all of this presentation in your own classes Under the following conditions: Attribution You must attribute the work to James Walden, but cannot do so in a way that suggests that he endorses you or your use of these materials. Share Alike If you remix, transform, or build upon this material, you must distribute the resulting work under this or a similar open license. Details and full text of the license can be found at
CIT 380: Securing Computer Systems
Authentication Slide #1 Topics 1. Identity 2. Groups and Roles 3. Network Identities 4. Authentication 5. Biometrics 6. UNIX Authentication Slide #2 What is Identity? Computer s representation of an entity
More informationAuthentication and Passwords. CSC 482/582: Computer Security
Authentication and Passwords Authentication 1. Identity 2. Groups and Roles 3. Network Identities 4. Authentication 5. Biometrics 6. UNIX Authentication 7. Password Threat Models and Attacks 8. Storing
More informationAuthentication Technologies
Authentication Technologies 1 Authentication The determination of identity, usually based on a combination of something the person has (like a smart card or a radio key fob storing secret keys), something
More informationCIT 380: Securing Computer Systems
CIT 380: Securing Computer Systems Passwords CIT 380: Securing Computer Systems Slide #1 Topics 1. Password Systems 2. Password Cracking 3. Hashing and Salting 4. UNIX Password Systems 5. Windows Password
More informationCIT 470: Advanced Network and System Administration. Topics. Namespaces. Accounts and Namespaces. 1. Namespaces 2. Policies
CIT 470: Advanced Network and System Administration Accounts and Namespaces CIT 470: Advanced Network and System Administration Slide #1 Topics 1. Namespaces 2. Policies 1. selection 2. lifetime 3. scope
More informationCIT 480: Securing Computer Systems. Operating System Concepts
CIT 480: Securing Computer Systems Operating System Concepts Topics 1. What is an OS? 2. Processes 3. Memory management 4. Filesystems 5. Virtual machines A Computer Model An operating system has to deal
More informationCIT 480: Securing Computer Systems. Putting It All Together
CIT 480: Securing Computer Systems Putting It All Together Assurance 1. Asset identification 1. Systems and information assets. 2. Infrastructure model and control 1. Network diagrams and inventory database.
More informationProcesses are subjects.
Identification and Authentication Access Control Other security related things: Devices, mounting filesystems Search path TCP wrappers Race conditions NOTE: filenames may differ between OS/distributions
More informationAuthentication System
A Biologically Inspired Password Authentication System Dipankar Dasgupta and Sudip Saha Center for Information Assurance University of Memphis Memphis, TN 38152 Outline Motivation Position Authentication
More informationProcesses are subjects.
Identification and Authentication Access Control Other security related things: Devices, mounting filesystems Search path Race conditions NOTE: filenames may differ between OS/distributions Principals
More informationWhat is Authentication? All requests for resources have to be monitored. Every request must be authenticated and authorized to use the resource.
P1L4 Authentication What is Authentication? All requests for resources have to be monitored. Every request must be authenticated and authorized to use the resource. Authentication: Who are you? Prove it.
More informationCIT 470: Advanced Network and System Administration. Topics. Risk Management. Security
CIT 470: Advanced Network and System Administration Security CIT 470: Advanced Network and System Administration Slide #1 Topics 1. Risk Management 2. Security Policies 3. OS Hardening 4. Authentication
More informationAccess Control. CMPSC Spring 2012 Introduction Computer and Network Security Professor Jaeger.
Access Control CMPSC 443 - Spring 2012 Introduction Computer and Network Security Professor Jaeger www.cse.psu.edu/~tjaeger/cse443-s12/ Access Control Describe the permissions available to computing processes
More informationCS530 Authentication
CS530 Authentication Bill Cheng http://merlot.usc.edu/cs530-s10 1 Identification vs. Authentication Identification associating an identity (or a claimed identity) with an individual, process, or request
More informationCSC 405 Introduction to Computer Security
CSC 405 Introduction to Computer Security Topic 4. Security in Conventional Operating Systems -- Part II 1 Basic Concepts of UNIX Access Control: Users, Groups, Files, Processes Each user has a unique
More informationIS 2150 / TEL 2810 Information Security and Privacy
IS 2150 / TEL 2810 Information Security and Privacy James Joshi Professor, SIS Access Control OS Security Overview Lecture 2, Sept 6, 2016 1 Objectives Understand the basics of access control model Access
More informationCIT 480: Securing Computer Systems. Incident Response and Honeypots
CIT 480: Securing Computer Systems Incident Response and Honeypots Incident Response What is an Incident? Phases of Incident Response 1. Preparation 2. Identification 3. Containment 4. Damage Assessment
More informationCIS 5373 Systems Security
CIS 5373 Systems Security Topic 3.2: OS Security Access Control Endadul Hoque Slide Acknowledgment Contents are based on slides from Ninghui Li (Purdue), John Mitchell (Stanford), Bogdan Carbunar (FIU)
More informationOutline. UNIX security ideas Users and groups File protection Setting temporary privileges. Examples. Permission bits Program language components
UNIX security Ulf Larson (modified by Erland Jonsson/Magnus Almgren) Computer security group Dept. of Computer Science and Engineering Chalmers University of Technology, Sweden Outline UNIX security ideas
More information10 userdel: deleting a user account 9. 1 Context Tune the user environment and system environment variables [3]
1. Context 1.111.1 2 8 Deleting a group 8 1.111.1 Manage users and group accounts and related system files Weight 4 Outline Contents Linux Professional Institute Certification 102 Nick Urbanik
More informationDatasäkerhet/Data security EDA625 Lect5
Ch. 6 Unix security Datasäkerhet/Data security EDA625 Lect5 Understand the security features of a typical operating system Users/passwords login procedure user superuser (root) access control (chmod) devices,
More informationCSE 127: Computer Security. Security Concepts. Kirill Levchenko
CSE 127: Computer Security Security Concepts Kirill Levchenko October 3, 2014 Computer Security Protection of systems against an adversary Secrecy: Can t view protected information Integrity: Can t modify
More informationInformation Security & Privacy
IS 2150 / TEL 2810 Information Security & Privacy James Joshi Associate Professor, SIS Lecture 8 Feb 24, 2015 Authentication, Identity 1 Objectives Understand/explain the issues related to, and utilize
More informationTopics. Authentication System. Passwords
Passwords Topics 1. Password Systems 2. Password Attacks 3. Mitigating Attacks 4. Graphical passwords 5. One-time passwords Authentication System A: set of authentication information information used by
More informationAuthentication Objectives People Authentication I
Authentication Objectives People Authentication I Dr. Shlomo Kipnis December 15, 2003 User identification (name, id, etc.) User validation (proof of identity) Resource identification (name, address, etc.)
More informationOperating system security
Operating system security Tuomas Aura T-110.4206 Information security technology Aalto University, autumn 2011 Outline Access control models in operating systems: 1. Unix 2. Windows Acknowledgements: This
More informationCSE 265: System and Network Administration
CSE 265: System and Network Administration User accounts The /etc/passwd file The /etc/shadow file Root powers Ownership of files and processes The superuser The /etc/group file Adding users Removing users
More informationProcesses and authentication
Processes and authentication UNIX process hierarchy ssh b146-* pstree -p less -S pstree -pu crandall lsof -p31009 nc -l 20202 & lsof -p31626 kill -9 31626 Process 1 Process 2 Process 3 System calls Kernel
More informationCSC 474 Network Security. Authentication. Identification
Computer Science CSC 474 Network Security Topic 6. Authentication CSC 474 Dr. Peng Ning 1 Authentication Authentication is the process of reliably verifying certain information. Examples User authentication
More informationAuthentication and Password CS166 Introduction to Computer Security 2/11/18 CS166 1
Authentication and Password CS166 Introduction to Computer Security 2/11/18 CS166 1 CIA Triad Confidentiality Prevent disclosure of information to unauthorized parties Integrity Detect data tampering Availability
More informationAuthentication. Chapter 2
Authentication Chapter 2 Learning Objectives Create strong passwords and store them securely Understand the Kerberos authentication process Understand how CHAP works Understand what mutual authentication
More informationData Security and Privacy. Unix Discretionary Access Control
Data Security and Privacy Unix Discretionary Access Control 1 Readings for This Lecture Wikipedia Filesystem Permissions Other readings UNIX File and Directory Permissions and Modes http://www.hccfl.edu/pollock/aunix1/filepermissions.htm
More informationIdentification, authentication, authorisation. Identification and authentication. Authentication. Authentication. Three closely related concepts:
Identification, authentication, authorisation Three closely related concepts: Identification and authentication WSPC, Chapter 6 Identification: associating an identity with a subject ( Who are you? ) Authentication:
More informationAIT 682: Network and Systems Security
AIT 682: Network and Systems Security Topic 6. Authentication Instructor: Dr. Kun Sun Authentication Authentication is the process of reliably verifying certain information. Examples User authentication
More informationAuthentication. Identification. AIT 682: Network and Systems Security
AIT 682: Network and Systems Security Topic 6. Authentication Instructor: Dr. Kun Sun Authentication Authentication is the process of reliably verifying certain information. Examples User authentication
More informationLecture 3 - Passwords and Authentication
CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger Lecture 3 - Passwords and Authentication CSE497b - Spring 2007 Introduction Computer and Network Security Professor
More informationBIOMETRIC MECHANISM FOR ONLINE TRANSACTION ON ANDROID SYSTEM ENHANCED SECURITY OF. Anshita Agrawal
BIOMETRIC MECHANISM FOR ENHANCED SECURITY OF ONLINE TRANSACTION ON ANDROID SYSTEM 1 Anshita Agrawal CONTENTS Introduction Biometric Authentication Fingerprints Proposed System Conclusion References 2 INTRODUCTION
More informationUser Authentication. Modified By: Dr. Ramzi Saifan
User Authentication Modified By: Dr. Ramzi Saifan Authentication Verifying the identity of another entity Computer authenticating to another computer Person authenticating to a local/remote computer Important
More informationLecture 3 - Passwords and Authentication
Lecture 3 - Passwords and Authentication CMPSC 443 - Spring 2012 Introduction Computer and Network Security Professor Jaeger www.cse.psu.edu/~tjaeger/cse443-s12 What is authentication? Reliably verifying
More informationChapter 5: User Management. Chapter 5 User Management
Chapter 5: User Management Chapter 5 User Management Last revised: 20/6/2004 Chapter 5 Outline In this chapter we will learn Where user and group account information is stored How to manage user accounts
More informationLecture 9. Authentication & Key Distribution
Lecture 9 Authentication & Key Distribution 1 Where are we now? We know a bit of the following: Conventional (symmetric) cryptography Hash functions and MACs Public key (asymmetric) cryptography Encryption
More informationUser & Group Administration
User & Group Administration David Morgan Users useradd/userdel /home/ /etc/passwd is the user database /etc/shadow has passwords (relocated from passwd) /etc/group whoami su / sudo / SUID process
More informationAuthentication Methods
CERT-EU Security Whitepaper 16-003 Authentication Methods D.Antoniou, K.Socha ver. 1.0 20/12/2016 TLP: WHITE 1 Authentication Lately, protecting data has become increasingly difficult task. Cyber-attacks
More informationUser Authentication. Modified By: Dr. Ramzi Saifan
User Authentication Modified By: Dr. Ramzi Saifan Authentication Verifying the identity of another entity Computer authenticating to another computer Person authenticating to a local/remote computer Important
More informationAuthentication. Amit Konar Math and Computer Sc., UMSL
Authentication Amit Konar Math and Computer Sc., UMSL What is Authentication? Authentication is the binding of an identity to a subject. Subjects act on behalf of some other, external entity. The identity
More informationCS615 - Aspects of System Administration. Multiuser Fundamentals
CS615 - Aspects of System Administration Slide 1 CS615 - Aspects of System Administration Multiuser Fundamentals Department of Computer Science Stevens Institute of Technology Jan Schaumann jschauma@stevens.edu
More informationSystems Analysis and Design in a Changing World, Fourth Edition
Systems Analysis and Design in a Changing World, Fourth Edition Learning Objectives Discuss examples of system interfaces found in information systems Define system inputs and outputs based on the requirements
More informationCNT4406/5412 Network Security
CNT4406/5412 Network Security Authentication Zhi Wang Florida State University Fall 2014 Zhi Wang (FSU) CNT4406/5412 Network Security Fall 2014 1 / 43 Introduction Introduction Authentication is the process
More informationInformation System Audit Engr. Abdul-Rahman Mahmood MS, PMP, MCP, QMR(ISO9001:2000)
Information System Audit Engr. Abdul-Rahman Mahmood MS, PMP, MCP, QMR(ISO9001:2000) armahmood786@yahoo.com alphasecure@gmail.com alphapeeler.sf.net/pubkeys/pkey.htm http://alphapeeler.sourceforge.net pk.linkedin.com/in/armahmood
More informationEvaluating Alternatives to Passwords
Security PS Evaluating Alternatives to Passwords Bruce K. Marshall, CISSP, IAM Senior Security Consultant bmarshall@securityps.com Key Topics Key Presentation Topics Authentication Model Authenticator
More informationOperating systems and security - Overview
Operating systems and security - Overview Protection in Operating systems Protected objects Protecting memory, files User authentication, especially passwords Trusted operating systems, security kernels,
More informationOperating systems and security - Overview
Operating systems and security - Overview Protection in Operating systems Protected objects Protecting memory, files User authentication, especially passwords Trusted operating systems, security kernels,
More informationHOST Authentication Overview ECE 525
Authentication Overview Authentication refers to the process of verifying the identity of the communicating principals to one another Usually sub-divided into Entity authentication Authentication in real-time
More informationIntroduction. Ahmet Burak Can Hacettepe University. Information Security
Introduction Ahmet Burak Can Hacettepe University abc@hacettepe.edu.tr Information Security 1 Books Textbook: Network Security: Private Communication in a Public World, 2nd Edition. C. Kaufman, R. Perlman,
More informationLecture 9 User Authentication
Lecture 9 User Authentication RFC 4949 RFC 4949 defines user authentication as: The process of verifying an identity claimed by or for a system entity. Authentication Process Fundamental building block
More informationKeys and Passwords. Steven M. Bellovin October 17,
Keys and Passwords Steven M. Bellovin October 17, 2010 1 Handling Long-Term Keys Where do cryptographic keys come from? How should they be handled? What are the risks? As always, there are tradeoffs Steven
More informationIntroduction to Security
IS 2150 / TEL 2810 Introduction to Security James Joshi Associate Professor, SIS Secure Design Principles OS Security Overview Lecture 2 September 4, 2012 1 Objectives Understand the basic principles of
More informationMANAGING THE NONUNIFORM BEHAVIOUR OF TERMINALS AND KEYBOARDS. : WHEN THINGS GO WRONG
MANAGING THE NONUNIFORM BEHAVIOUR OF TERMINALS AND KEYBOARDS. : WHEN THINGS GO WRONG Terminals and keyboards have no uniform behavioral pattern. Terminal settings directly impact the keyboard operation.
More informationCOMPGA12 1 TURN OVER
Applied Cryptography, COMPGA12, 2009-10 Answer ALL questions. 2 hours. Marks for each part of each question are indicated in square brackets Calculators are NOT permitted 1. Multiple Choice Questions.
More informationCompTIA Security+ (Exam SY0-401) Course 01 Security Fundamentals
CompTIA Security+ (Exam SY0-401) Course 01 Security Fundamentals This course contains copyrighted material used by permission of Logical Operations, Inc. Slide 1 Course 01: Security Fundamentals The Information
More informationOS Security. Authentication. Radboud University Nijmegen, The Netherlands. Winter 2014/2015
OS Security Authentication Radboud University Nijmegen, The Netherlands Winter 2014/2015 What does an OS do? Definition An operating system (OS) is a computer program that manages access of processes (programs)
More information0/41. Alice Who? Authentication Protocols. Andreas Zeller/Stephan Neuhaus. Lehrstuhl Softwaretechnik Universität des Saarlandes, Saarbrücken
0/41 Alice Who? Authentication Protocols Andreas Zeller/Stephan Neuhaus Lehrstuhl Softwaretechnik Universität des Saarlandes, Saarbrücken The Menu 1/41 Simple Authentication Protocols The Menu 1/41 Simple
More informationCopyright
This video looks at Claim Based/Identity Based systems using Active Directory Federation Services as an example. An example of a claim based system is where the user logs into a system like a web page
More informationUnit-VI. User Authentication Mechanisms.
Unit-VI User Authentication Mechanisms Authentication is the first step in any cryptographic solution Authentication can be defined as determining an identity to the required level of assurance Passwords
More informationUser authentication:
User authentication: passwords versus alternative criteria Authentication verifying identity of a user example: logging into a system example: GPG digital signature is the authentication mechanism that
More informationCPET 581 E-Commerce & Business Technologies. References
CPET 581 E-Commerce & Business Technologies The E-Commerce Security Part 2 of 2 Paul I-Hai Lin, Professor http://www.etcs.ipfw.edu/~lin A Specialty Course for M.S. in Technology IT/Advanced Computer Applications
More informationIntroduction to Security
IS 2150 / TEL 2810 Introduction to Security James Joshi Assistant Professor, SIS Secure Design Principles OS Security Overview Lecture 1 September 2, 2008 1 Objectives Understand the basic principles of
More informationCristina Nita-Rotaru. CS355: Cryptography. Lecture 17: X509. PGP. Authentication protocols. Key establishment.
CS355: Cryptography Lecture 17: X509. PGP. Authentication protocols. Key establishment. Public Keys and Trust Public Key:P A Secret key: S A Public Key:P B Secret key: S B How are public keys stored How
More informationTopics. Dramatis Personae Cathy, the Computer, trusted 3 rd party. Cryptographic Protocols
Cryptographic Protocols Topics 1. Dramatis Personae and Notation 2. Session and Interchange Keys 3. Key Exchange 4. Key Generation 5. Cryptographic Key Infrastructure 6. Storing and Revoking Keys 7. Digital
More informationBiometrics. Something you are A characteristic of the body Presumed unique and invariant over time. Steven M. Bellovin February 5,
Biometrics Something you are A characteristic of the body Presumed unique and invariant over time Steven M. Bellovin February 5, 2007 1 Common Biometrics Fingerprint Iris scan Retinal scan Hand geometry
More informationDiscovering Computers Living in a Digital World
Discovering Computers 2011 Living in a Digital World Objectives Overview Define input and differentiate among a program, command, and user response Identify the keys and buttons commonly found on desktop
More informationICT 6541 Applied Cryptography Lecture 8 Entity Authentication/Identification
ICT 6541 Applied Cryptography Lecture 8 Entity Authentication/Identification Hossen Asiful Mustafa Introduction Entity Authentication is a technique designed to let one party prove the identity of another
More informationFIREWALLS & NETWORK SECURITY with Intrusion Detection and VPNs, 2 nd ed. Chapter 10 Authenticating Users
FIREWALLS & NETWORK SECURITY with Intrusion Detection and VPNs, 2 nd ed. Chapter 10 Authenticating Users Learning Objectives Explain why authentication is a critical aspect of network security Explain
More informationPasswords CSC 193 WAKE FOREST. U N I V E R S I T Y Department of Computer Science. Spring 2014
Passwords CSC 193 WAKE FOREST U N I V E R S I T Y Department of Computer Science Spring 2014 Unix Passwords In Unix, users are identified by user names Authenticated by passwords Therefore to login as
More informationO/S & Access Control. Aggelos Kiayias - Justin Neumann
O/S & Access Control Aggelos Kiayias - Justin Neumann One system Many users Objects that require protection memory I/O devices (disks, printers) programs and processes networks stored data in general Separation
More informationModule: Authentication. Professor Trent Jaeger. CSE543 - Introduction to Computer and Network Security
CSE543 - Introduction to Computer and Network Security Module: Authentication Professor Trent Jaeger 1 1 Authentication and Authorization Fundamental mechanisms to enforce security on a system Authentication:
More informationComputer Security: Principles and Practice
Computer Security: Principles and Practice Chapter 3 User Authentication First Edition by William Stallings and Lawrie Brown Lecture slides by Lawrie Brown User Authentication fundamental security building
More informationMDR-1 Mobile Document Reader
MDR-1 Mobile Document Reader SPC_MDR-1 1/7 Mobile Document Reader MDR-1 Security Printing Consulting AG The new MDR-1 document reader fulfill the needs for fast and reliable reading, verification and authentication
More informationComputer Security 3e. Dieter Gollmann. Security.di.unimi.it/1516/ Chapter 4: 1
Computer Security 3e Dieter Gollmann Security.di.unimi.it/1516/ Chapter 4: 1 Chapter 4: Identification & Authentication Chapter 4: 2 Agenda User authentication Identification & authentication Passwords
More informationSecurity & Privacy. Web Architecture and Information Management [./] Spring 2009 INFO (CCN 42509) Contents. Erik Wilde, UC Berkeley School of
Contents Security & Privacy Contents Web Architecture and Information Management [./] Spring 2009 INFO 190-02 (CCN 42509) Erik Wilde, UC Berkeley School of Information Abstract 1 Security Concepts Identification
More informationWhat is RFID, where is it being used and why? Security implications of RFID Why is it being used to secure passports? The methodology used to asses
Matthew Sirotich What is RFID, where is it being used and why? Security implications of RFID Why is it being used to secure passports? The methodology used to asses epassports and create its successor
More informationTPM v.s. Embedded Board. James Y
TPM v.s. Embedded Board James Y What Is A Trusted Platform Module? (TPM 1.2) TPM 1.2 on the Enano-8523 that: How Safe is your INFORMATION? Protects secrets from attackers Performs cryptographic functions
More informationSSH. Partly a tool, partly an application Features:
Internet security SSH 1 Secure Shell: SSH Partly a tool, partly an application Features: Encrypted login and shell connections Easy, drop-in replacements for rlogin, rsh, rcp Multiple means of authentication
More informationPasswords. EJ Jung. slide 1
Passwords EJ Jung slide 1 Basic Problem? How do you prove to someone that you are who you claim to be? Any system with access control must solve this problem slide 2 Many Ways to Prove Who You Are What
More informationChapter 6: Digital Certificates Introduction Authentication Methods PKI Digital Certificate Passing
Chapter 6: Digital Certificates Introduction Methods PKI Digital Certificate Passing Prof Bill Buchanan OBE http://asecuritysite.com/crypto06 http://asecuritysite.com/encryption Identity on the Internet
More informationUser accounts and authorization
User accounts and authorization Authentication vs authorization Authentication: proving the identity of someone Authorization: allowing a user to access certain resources 1 Government authorization documents
More informationPre-Assessment Answers-1
Pre-Assessment Answers-1 0Pre-Assessment Answers Lesson 1 Pre-Assessment Questions 1. What is the name of a statistically unique number assigned to all users on a Windows 2000 system? a. A User Access
More informationIntroduction to Information & Communication Technologies
Introduction to Information & Communication Technologies CHAPTER # 5 1 The Course Course Code: ICT-2021 Course Title: Introduction to Information & Communication Technologies Instructor: JAWAD AHMAD Email
More informationMSc-IT 1st semester Fall
Objectives Overview Discovering Computers 2012 Course Instructor: M. Imran Khalil MSc-IT 1 st semester Fall 2016 Define input and differentiate among a program, command, and user response Describe various
More informationUnix, History
Operating systems Examples from Unix, VMS, Windows NT on user authentication, memory protection and file and object protection. Trusted Operating Systems, example from PitBull Unix, History Unix, History
More informationNon Person Identities After all, who cares about me? Gilles Lisimaque & Dave Auman Identification technology Partners, Inc.
Identities Non Person Identities After all, who cares about me? Gilles Lisimaque & Dave Auman Identification technology Partners, Inc. Device Identifiers Most devices we are using everyday have (at least)
More informationOperating system security models
Operating system security models Unix security model Windows security model MEELIS ROOS 1 General Unix model Everything is a file under a virtual root diretory Files Directories Sockets Devices... Objects
More informationIntroduction to Computer Security
Introduction to Computer Security UNIX Security Pavel Laskov Wilhelm Schickard Institute for Computer Science Genesis: UNIX vs. MULTICS MULTICS (Multiplexed Information and Computing Service) a high-availability,
More informationThree Level Authentication for Student Attendance Management System
Volume 119 No. 15 2018, 1997-2012 ISSN: 1314-3395 (on-line version) url: http://www.acadpubl.eu/hub/ http://www.acadpubl.eu/hub/ Three Level Authentication for Student Attendance Management System 1 G.Ravi
More informationCIT 480: Securing Computer Systems
CIT 480: Securing Computer Systems Tunneling and VPNs CIT 480: Securing Computer Systems Slide #1 Topics 1. Tunneling 1. Encapsulation 2. Security 3. SSH 2. Virtual Private Networks 1. Site-to-site 2.
More informationOperating System Security. 0Handouts: Quizzes ProsoftTraining All Rights Reserved. Version 3.07
0Handouts: Lesson 1 Quiz 1. What is the working definition of authentication? a. The ability for a person or system to prove identity. b. Protection of data on a system or host from unauthorized access.
More informationCSE 565 Computer Security Fall 2018
CSE 565 Computer Security Fall 2018 Lecture 13: Operating System Security Department of Computer Science and Engineering University at Buffalo 1 Review Previous topics access control authentication session
More informationCIS 4360 Secure Computer Systems Biometrics (Something You Are)
CIS 4360 Secure Computer Systems Biometrics (Something You Are) Professor Qiang Zeng Spring 2017 Previous Class Credentials Something you know (Knowledge factors) Something you have (Possession factors)
More informationSecurity. Advanced Operating Systems and Virtualization Alessandro Pellegrini A.Y. 2017/2018
Security Advanced Operating Systems and Virtualization Alessandro Pellegrini A.Y. 2017/2018 Basic Security Aspects 1. Systems must be usable by legitimate users only 2. Access is granted on the basis of
More informationSession objectives. Identification and Authentication. A familiar scenario. Identification and Authentication
Session objectives Background Identification and Authentication CSM27 Computer Security Dr Hans Georg Schaathun University of Surrey Autumn 2008 Week 3 Recognise the purposes of (password) identification.
More information