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Information System Security introduction

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Shu Shin
Shu Shin

Introduction

Technology
1 of 79
UCCN 1213 Information Security: An Introduction October 2011
Definition ,[object Object],[object Object],[object Object],[object Object],[object Object]
History ,[object Object],[object Object],[object Object],[object Object],[object Object]
1960s to 1980s ,[object Object],[object Object],[object Object],[object Object]
1960s to 1980s ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Key Dates for Seminal Works in Early Computer Security
2000 to Present ,[object Object],[object Object],[object Object]
What is Security ,[object Object],[object Object],[object Object],[object Object],[object Object]
What is Security ,[object Object],[object Object],[object Object],[object Object]
Components of Information Security
What is Security ,[object Object],[object Object],[object Object],[object Object],[object Object]
Security Goal Integrity Confidentiality Availability
Critical Characteristics of Information ,[object Object],[object Object],[object Object],[object Object]
Critical Characteristics of Information ,[object Object],[object Object],[object Object],[object Object],[object Object]
CNSS Security Model The McCumber Cube
Cryptography ,[object Object],[object Object],[object Object],[object Object]
Cryptographic Concepts ,[object Object],Alice Bob Eve
Encryption and Decryption ,[object Object],[object Object],encrypt decrypt ciphertext plaintext shared secret key shared secret key Communication channel Sender Recipient Attacker (eavesdropping) plaintext
Encryption and Decryption ,[object Object],[object Object],[object Object],[object Object]
Caesar Cipher ,[object Object],[object Object],[object Object],[object Object],Public domain image from http://commons.wikimedia.org/wiki/File:Caesar3.svg
Symmetric Cryptosystems ,[object Object],encrypt decrypt ciphertext plaintext shared secret key shared secret key Communication channel Sender Recipient Attacker (eavesdropping) plaintext
Symmetric Key Distribution ,[object Object],n  n  1  2 keys shared secret shared secret shared secret shared secret shared secret shared secret
Public-Key Cryptography
Public-Key Cryptography ,[object Object],encrypt decrypt ciphertext plaintext public key private key Communication channel Sender Recipient Attacker (eavesdropping) plaintext plaintext
Public Key Distribution ,[object Object],n key pairs private private private private public public public public
Digital Signatures
Cryptographic Hash Functions ,[object Object],[object Object],[object Object],[object Object]
Message Authentication Codes ,[object Object],[object Object],(attack detected) =? MAC h shared secret key Communication channel Sender Recipient Attacker (modifying) MAC 6B34339 4C66809 4C66809 message M’ h shared secret key 87F9024 received MAC computed MAC message M
Digital Certificates ,[object Object]
Access Control Models ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Access Control Matrices ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example Access Control Matrix
Access Control Lists ,[object Object],/etc/passwd /usr/bin/ /u/roberto/ /admin/ root: r,w,x backup: r,x root: r,w,x roberto: r,w,x backup: r,x root: r,w,x mike: r,x roberto: r,x backup: r,x root: r,w mike: r roberto: r backup: r
Capabilities ,[object Object],/etc/passwd: r,w,x; /usr/bin: r,w,x; /u/roberto: r,w,x; /admin/: r,w,x root /usr/passwd: r; /usr/bin: r; /u/roberto: r,w,x roberto /usr/passwd: r; /usr/bin: r,x mike backup /etc/passwd: r,x; /usr/bin: r,x; /u/roberto: r,x; /admin/: r,x
Role-based Access Control ,[object Object],Department Member Administrative Personnel Accountant Secretary Administrative Manager Faculty Lab Technician Lab Manager Student Undergraduate Student Graduate Student Department Chair Technical Personnel Backup Agent System Administrator Undergraduate TA Graduate TA
Passwords ,[object Object],[object Object],[object Object]
How a password is stored? Password file User Butch:ASDSA 21QW3R50E ERWWER323 … … hash function Dog124
Strong Passwords ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Password Complexity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Password Length ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Password Validity: Brute Force Test ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Secure Passwords ,[object Object],[object Object]
Social Engineering ,[object Object],[object Object],[object Object]
Direct Attacks on Computational Devices
Environmental Attacks ,[object Object],[object Object],[object Object]
Eavesdropping ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Wiretapping ,[object Object],[object Object],[object Object]
Signal Emanations ,[object Object],[object Object],[object Object]
Acoustic Emissions ,[object Object],[object Object],[object Object],microphone to capture keystroke sounds sound recording device
Hardware Keyloggers ,[object Object],[object Object],[object Object],USB Keylogger
TEMPEST ,[object Object],[object Object],[object Object],[object Object],[object Object]
Emanation Blockage ,[object Object],[object Object],[object Object]
Faraday Cages ,[object Object],[object Object]
Computer Forensics ,[object Object],[object Object]
Computer Forensics ,[object Object]
ATMs ,[object Object],[object Object],[object Object],ATM
ATMs ,[object Object],[object Object],[object Object],ATM 3DES Encryption Bank
Attacks on ATMs ,[object Object],[object Object],[object Object]
Authentication Technologies
Authentication ,[object Object],[object Object],[object Object],[object Object],Something you are Something you know Something you have radio token with secret keys password=ucIb()w1V mother=Jones pet=Caesar human with fingers and eyes
Barcodes ,[object Object],[object Object],[object Object]
Authentication via Barcodes ,[object Object],[object Object],[object Object],[object Object],Public domain image from http://commons.wikimedia.org/wiki/File:Bpass.jpg Two-dimensional barcode
Magnetic Stripe Cards ,[object Object],[object Object],[object Object],Public domain image by Alexander Jones from http://commons.wikimedia.org/wiki/File:CCardBack.svg
Magnetic Stripe Card Security ,[object Object],[object Object],[object Object],[object Object],Public domain image by Alexander Jones from http://commons.wikimedia.org/wiki/File:CCardBack.svg
Smart Cards ,[object Object],[object Object],Public domain image from http://en.wikipedia.org/wiki/File:Carte_vitale_anonyme.jpg Circuit interface
Smart Card Authentication ,[object Object],[object Object]
SIM Cards ,[object Object],[object Object]
SIM Card Security ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
GSM Challenge-Response Protocol ,[object Object],[object Object],[object Object],[object Object],IMSI = (this phone’s ID) R = a 128-bit random number (the challenge) E K (R) = the 128-bit random number encrypted using the subscriber’s secret key K (the response)
RFIDs ,[object Object],[object Object]
RFID Technology ,[object Object],[object Object],[object Object]
RFID Technology ,[object Object],[object Object],[object Object],[object Object]
Passports ,[object Object],e-Passport symbol RFID chip and antenna is embedded in the cover
Passport Security ,[object Object],[object Object],[object Object],[object Object]
Biometrics ,[object Object],[object Object],Image from http://commons.wikimedia.org/wiki/File:Fingerprint_scanner_in_Tel_Aviv.jpg used with permission under the Creative Commons Attribution 3.0 Unported license
Requirements for Biometric Identification ,[object Object],[object Object],[object Object],[object Object]
Biometric Identification Feature vector Reference vector Comparison algorithm matches doesn’t match Biometric Reader
Candidates for Biometric IDs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Public domain image from http://commons.wikimedia.org/wiki/File:Retinal_scan_securimetrics.jpg Public domain image from http://commons.wikimedia.org/wiki/File:CBP_chemist_reads_a_DNA_profile.jpg Public domain image from http://commons.wikimedia.org/wiki/File:Fingerprint_Arch.jpg
Summary ,[object Object],[object Object],[object Object],[object Object]

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Information System Security introduction

Editor's Notes

  1. This graphic informs the fundamental approach of the chapter and can be used to illustrate the intersection of information states (x-axis), key objectives of C.I.A. (y-axis), and the three primary means to implement (policy, education, and technology). CNSS stands for Committee of National Security Systems.
  2. Spostare in altra sezione
  3. 11/22/11 Introduction
  4. 11/22/11 Introduction