Holdings: Real 802.11 security

Real 802.11 security: Wi-Fi protected access and 802.11i

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Bibliographic Details
Main Author:	Edney, Jon (Author)
Format:	Book
Language:	English
Published:	Boston ; Munich [u.a.] Addison-Wesley 2004
Edition:	3. print.
Subjects:	IEEE 802 > 11 IEEE 802.11 (Standard) Wireless LANs > Security measures Sicherheit Lokales Netz Drahtloses lokales Netz Computersicherheit
Online Access:	Inhaltsverzeichnis
Physical Description:	XXI, 451 S. Ill.
ISBN:	0321136209

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Record in the Search Index

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adam_text	Contents Preface xv Acknowledgments xxi Part 1 What Everyone Should Know 1 Chapter 1 Introduction 3 Setting the Scene 3 Roadmap to the Book 5 Notes on the Book 6 Chapter 2 Security Principles 7 What Is Security? 7 Good Security Thinking 8 1. Don t Talk to Anyone You Don t Know 8 2. Accept Nothing Without a Guarantee 10 3. Treat Everyone as an Enemy until Proved Otherwise 11 4. Don t Trust Your Friends for Long í 2 5. Use Well-Tried Solutions 13 6. Watch the Ground You Are Standing on for Cracks 15 Security Terms 17 Summary 19 Chapter 3 Why Is Wi-Fi Vulnerable to Attack? 21 Changing the Security Model 21 What Are the Enemies Like? 22 Gaming Attackers 23 Profit or Revenge Attackers 25 Ego Attackers 26 Traditional Security Architecture 27 Option 1 : Put Wireless LAN in the Untrusted Zone 29 Option 2: Make Wi-Fi LAN Trusted 30 Danger of Passive Monitoring 31 Summary 32 Chapter 4 Different Types of Attack 33 Classification of Attacks 34 Attacks Without Keys 35 Snooping 3 6 Man-in-the-Middle Attack (Modification) 37 Attacks on the Keys 40 One-Time Passwords 41 Burying the Keys 41 Wireless Attacks 42 Attacking the Keys Through Brute Force 45 Dictionary Attacks 46 Algorithmic Attacks 47 Summary 48 Part II The Design of Wi-Fi Security 49 Chapter 5 IEEE 802.11 Protocol Primer 51 Layers 51 Wireless LAN Organization 53 Basics of Operation in Infrastructure Mode 54 Beacons 55 Probing 56 Connecting to an AP 56 Roaming 56 Sending Data 56 Protocol Details 57 General Frame Formats 57 AC header 58 Management Frames 60 Radio Bits 63 Summary 65 Chapter 6 How IEEE 802.11 WEP Works and Why It Doesn t 67 Introduction 67 Authentication 69 Privacy 72 Use ofRC4 Algorithm 73 Initialization Vector (IV) 74 WEP Keys 76 Mechanics of WEP 83 Fragmentation 83 Integrity Check Value (ICV) 84 Preparing the Frame for Transmission 85 RC4 Encryption Algorithm 86 Why WEP Is Not Secure 89 Authentication 90 Access Control 93 Replay Prevention 93 Message Modification Detection 94 Message Privacy 95 RC4 Weak Keys 99 Direct Key Attacks 100 Summary 101 Chapter 7 WPA, RSN, and IEEE 802.11 і 103 Relationship Between Wi-Fi and IEEE 802.11 103 What Is IEEE 802.1 li? 104 What Is WPA? 105 Differences Between RSN and WPA 106 Security Context 107 Keys 108 Security Layers 110 How the Layers Are Implemented 111 Relationship of the Standards 113 List of Standards 113 Pictorial Map 114 Summary 115 Chapter 8 Access Control: IEEE 802.1 Χ, ΕΑΡ, and RADIUS 117 Importance of Access Control 117 Authentication for Dial-in Users 120 IEEE 802. ЇХ 122 IEEE 802. IX in a Simple Switched Hub Environment 124 IEEE 802. IX in Wi-Fi LANs 127 ΕΑΡ Principles 129 ΕΑΡ Message Formats 131 EAPOL 133 EAPOL-Start 133 EAPOL-Key 134 EAPOL-Packet 134 EAPOL-Logoff 134 Messages Used in IEEE 802. IX 135 Authentication Sequence 135 Implementation Considerations 137 RADIUS — Remote Access Dial-In User Service 138 RADIUS Mechanics 140 ΕΑΡ over RADIUS 144 Use of RADIUS in WPA and RSN 146 Summary 147 Chapter 9 Upper-Layer Authentication 149 Introduction 149 Who Decides Which Authentication Method to Use? 150 Use of Keys in Upper-Layer Authentication 151 Symmetric Keys 151 Asymmetrie Keys 151 Certificates and Certification Authorities 153 A Detailed Look at Upper-Level Authentication Methods 155 Transport Layer Security (TLS) 155 Functions oj TLS 156 Handshake Exchange í 59 Relationship of TLS Handshake and WPA /RSN 164 TLS over ΕΑΡ 165 Summary of TLS 169 Kerberos V5 169 Using Tickets 169 Kerberos Tickets 171 Obtaining the Ticket-Granting Ticket 171 Service Tickets 172 Cross-Domain Access 174 How Tickets Work 176 Use of Kerberos in RSN 178 Cisco Light ΕΑΡ (LEAP) 184 Protected ΕΑΡ Protocol (PEAP) 186 Phase 1 188 Phase 2 189 Status of PEAP 189 Authentication in the Cellular Phone World: EAP-SIM 189 Overview of Authentication in a GSM Network 191 Linking GSM Security to Wi-Fi LAN Security 192 EAP-SIM 193 Status of GSM-SIM Authentication 196 Summary 196 Chapter 10 WPA and RSN Key Hierarchy 199 Pairwise and Group Keys 199 Pairwise Key Hierarchy 201 Creating and Delivering the PMK 201 Computing the Temporal Keys 203 Exchanging and Verifying Key Information 204 Completing the Handshake 207 Group Key Hierarchy 207 Summary of the Key Establishment Process 210 Key Hierarchy Using AES-CCMP 211 Mixed Environments 212 Summary of Key Hierarchies 212 Details of Key Derivation for WPA 214 Four- Way Handshake 217 Group Key Handshake 223 Nonce Selection 224 Computing the Temporal Keys 225 Summary 229 Chapter 11 TKIP 231 What Is TKIP and Why Was It Created? 231 TKIP Overview 234 Message Integrity 235 IV Selection and Use 238 Per-Packet Key Mixing 243 TKIP Implementation Details 245 Message Integrity — Michael 249 Countermeasures 249 Computation of the MIC 252 Per-Packet Key Mixing 255 Substitution Table or S-Box 256 Phase 1 Computation 257 Phase 2 Computation 258 Summary 259 Chapter^ AES-CCMP 261 Introduction 261 Why AES? 262 AES Overview 264 Modes of Operation 264 Offset Codebook Mode (OCB) 269 How CCMP Is Used in RSN 269 Steps in Encrypting a Transmission 270 CCMP Header 271 Overview of Implementation 272 Steps in Encrypting an MPDU 273 Decrypting MPDUs 277 Summary 278 Chapter 13 Wi-Fi LAN Coordination: ESS and IBSS 279 Network Coordination 279 ESS Versus IBSS 280 Joining an ESS Network 280 WPA/RSN Information Element 282 Validating the Information Elements 283 Preauthentication Using IEEE 802. IX 283 IBSS Ad -Нос Networks 285 Summary 289 Part III Wi-Fi Security in the Real World 291 Chapter 14 Public Wireless Hotspots 293 Development of Hotspots 293 Public Wireless Access Defined 294 Barriers to Growth 294 Security Issues in Public Hotspots 296 How Hotspots Are Organized 297 Subscribers 298 Access Points 299 Hotspot Controllers 300 Authentication Server 302 Different Types of Hotspots 303 Airports 303 Hotels 303 Coffee Shops 303 Homes 304 How to Protect Yourself When Using a Hotspot 305 Personal Firewall Software 305 Virtual Private Network (VPN) 306 Summary 308 Chapter 15 Known Attacks: Technical Review 311 Review of Basic Security Mechanisms 311 Confidentiality 3Í2 Integrity 314 Review of Previous IEEE 802.11 Security Mechanisms 316 Confidentiality 316 RC4andWEP 316 Integrity and Authentication 321 Attacks Against the Previous IEEE 802.11 Security Mechanisms 322 Confidentiality 322 Access Control 329 Authentication 330 Man-in-the-Middle Attacks 331 Management Frames 33 í ARP Spoofing 332 Problems Created by Man-in-the-Middle Attacks 333 802. lx and ΕΑΡ 333 PEAP 334 Denial-of-Service Attacks 334 Layer 2 Denial-of-Service Attacks Against All Wi-Fi-Based Standards 335 WPA Cryptographic Denial-of-Service Attack 335 Summary 336 Chapter 16 Actual Attack Tools 337 Attacker Goals 338 Process 338 Reconnaissance 338 Example Scenarios 345 Planning 346 Collection 348 Analysis 349 Execution 350 Other Tools of Interest 351 Airsnort 351 Airjack 352 Summary 353 Chapter 17 Open Source Implementation Example 355 General Architecture Design Guidelines 355 Protecting a Deployed Network 357 Isolate and Canalize 357 Upgrade Equipment s Firmware to WPA 351 What to Do If You Can t Do Anything 358 Planning to Deploy a WPA Network 359 Deploying the Infrastructure 360 Add a RADIUS Server for IEEE 802. IX Support 3 60 Use a Public Key Infrastructure for Client Certificates 360 Install Client IEEE 802. IX Supplicant Software 360 Practical Example Based on Open Source Projects 361 Server Infrastucture 361 Building an Open Source Access Point 3 74 Making It All Work 376 Summary 383 Acknowledgments 384 References and More Information 384 Appendixes 385 Appendix A Overview of the AES Block Cipher 387 Finite Field Arithmetic 388 Addition 389 Subtraction 390 Multiplication 390 Division 391 Galois Field GF() 392 Conclusion 397 Steps in the AES Encryption Process 398 Round Keys 399 Computing the Rounds 401 Decryption 403 Summary of AES 405 Appendix В Example Message Modification 407 Appendix С Verifying the Integrity of Downloaded Files 411 Checking the MD5 Digest 411 Checking the GPG Signature 412 Acronyms 417 References 421 Index 425
adam_txt	Contents Preface xv Acknowledgments xxi Part 1 What Everyone Should Know 1 Chapter 1 Introduction 3 Setting the Scene 3 Roadmap to the Book 5 Notes on the Book 6 Chapter 2 Security Principles 7 What Is Security? 7 Good Security Thinking 8 1. Don't Talk to Anyone You Don't Know 8 2. Accept Nothing Without a Guarantee 10 3. Treat Everyone as an Enemy until Proved Otherwise 11 4. Don't Trust Your Friends for Long í 2 5. Use Well-Tried Solutions 13 6. Watch the Ground You Are Standing on for Cracks 15 Security Terms 17 Summary 19 Chapter 3 Why Is Wi-Fi Vulnerable to Attack? 21 Changing the Security Model 21 What Are the Enemies Like? 22 Gaming Attackers 23 Profit or Revenge Attackers 25 Ego Attackers 26 Traditional Security Architecture 27 Option 1 : Put Wireless LAN in the Untrusted Zone 29 Option 2: Make Wi-Fi LAN Trusted 30 Danger of Passive Monitoring 31 Summary 32 Chapter 4 Different Types of Attack 33 Classification of Attacks 34 Attacks Without Keys 35 Snooping 3 6 Man-in-the-Middle Attack (Modification) 37 Attacks on the Keys 40 One-Time Passwords 41 Burying the Keys 41 Wireless Attacks 42 Attacking the Keys Through Brute Force 45 Dictionary Attacks 46 Algorithmic Attacks 47 Summary 48 Part II The Design of Wi-Fi Security 49 Chapter 5 IEEE 802.11 Protocol Primer 51 Layers 51 Wireless LAN Organization 53 Basics of Operation in Infrastructure Mode 54 Beacons 55 Probing 56 Connecting to an AP 56 Roaming 56 Sending Data 56 Protocol Details 57 General Frame Formats 57 AC header 58 Management Frames 60 Radio Bits 63 Summary 65 Chapter 6 How IEEE 802.11 WEP Works and Why It Doesn't 67 Introduction 67 Authentication 69 Privacy 72 Use ofRC4 Algorithm 73 Initialization Vector (IV) 74 WEP Keys 76 Mechanics of WEP 83 Fragmentation 83 Integrity Check Value (ICV) 84 Preparing the Frame for Transmission 85 RC4 Encryption Algorithm 86 Why WEP Is Not Secure 89 Authentication 90 Access Control 93 Replay Prevention 93 Message Modification Detection 94 Message Privacy 95 RC4 Weak Keys 99 Direct Key Attacks 100 Summary 101 Chapter 7 WPA, RSN, and IEEE 802.11 і 103 Relationship Between Wi-Fi and IEEE 802.11 103 What Is IEEE 802.1 li? 104 What Is WPA? 105 Differences Between RSN and WPA 106 Security Context 107 Keys 108 Security Layers 110 How the Layers Are Implemented 111 Relationship of the Standards 113 List of Standards 113 Pictorial Map 114 Summary 115 Chapter 8 Access Control: IEEE 802.1 Χ, ΕΑΡ, and RADIUS 117 Importance of Access Control 117 Authentication for Dial-in Users 120 IEEE 802. ЇХ 122 IEEE 802. IX in a Simple Switched Hub Environment 124 IEEE 802. IX in Wi-Fi LANs 127 ΕΑΡ Principles 129 ΕΑΡ Message Formats 131 EAPOL 133 EAPOL-Start 133 EAPOL-Key 134 EAPOL-Packet 134 EAPOL-Logoff 134 Messages Used in IEEE 802. IX 135 Authentication Sequence 135 Implementation Considerations 137 RADIUS — Remote Access Dial-In User Service 138 RADIUS Mechanics 140 ΕΑΡ over RADIUS 144 Use of RADIUS in WPA and RSN 146 Summary 147 Chapter 9 Upper-Layer Authentication 149 Introduction 149 Who Decides Which Authentication Method to Use? 150 Use of Keys in Upper-Layer Authentication 151 Symmetric Keys 151 Asymmetrie Keys 151 Certificates and Certification Authorities 153 A Detailed Look at Upper-Level Authentication Methods 155 Transport Layer Security (TLS) 155 Functions oj TLS 156 Handshake Exchange í 59 Relationship of TLS Handshake and WPA /RSN 164 TLS over ΕΑΡ 165 Summary of TLS 169 Kerberos V5 169 Using Tickets 169 Kerberos Tickets 171 Obtaining the Ticket-Granting Ticket 171 Service Tickets 172 Cross-Domain Access 174 How Tickets Work 176 Use of Kerberos in RSN 178 Cisco Light ΕΑΡ (LEAP) 184 Protected ΕΑΡ Protocol (PEAP) 186 Phase 1 188 Phase 2 189 Status of PEAP 189 Authentication in the Cellular Phone World: EAP-SIM 189 Overview of Authentication in a GSM Network 191 Linking GSM Security to Wi-Fi LAN Security 192 EAP-SIM 193 Status of GSM-SIM Authentication 196 Summary 196 Chapter 10 WPA and RSN Key Hierarchy 199 Pairwise and Group Keys 199 Pairwise Key Hierarchy 201 Creating and Delivering the PMK 201 Computing the Temporal Keys 203 Exchanging and Verifying Key Information 204 Completing the Handshake 207 Group Key Hierarchy 207 Summary of the Key Establishment Process 210 Key Hierarchy Using AES-CCMP 211 Mixed Environments 212 Summary of Key Hierarchies 212 Details of Key Derivation for WPA 214 Four- Way Handshake 217 Group Key Handshake 223 Nonce Selection 224 Computing the Temporal Keys 225 Summary 229 Chapter 11 TKIP 231 What Is TKIP and Why Was It Created? 231 TKIP Overview 234 Message Integrity 235 IV Selection and Use 238 Per-Packet Key Mixing 243 TKIP Implementation Details 245 Message Integrity — Michael 249 Countermeasures 249 Computation of the MIC 252 Per-Packet Key Mixing 255 Substitution Table or S-Box 256 Phase 1 Computation 257 Phase 2 Computation 258 Summary 259 Chapter^ AES-CCMP 261 Introduction 261 Why AES? 262 AES Overview 264 Modes of Operation 264 Offset Codebook Mode (OCB) 269 How CCMP Is Used in RSN 269 Steps in Encrypting a Transmission 270 CCMP Header 271 Overview of Implementation 272 Steps in Encrypting an MPDU 273 Decrypting MPDUs 277 Summary 278 Chapter 13 Wi-Fi LAN Coordination: ESS and IBSS 279 Network Coordination 279 ESS Versus IBSS 280 Joining an ESS Network 280 WPA/RSN Information Element 282 Validating the Information Elements 283 Preauthentication Using IEEE 802. IX 283 IBSS Ad -Нос Networks 285 Summary 289 Part III Wi-Fi Security in the Real World 291 Chapter 14 Public Wireless Hotspots 293 Development of Hotspots 293 Public Wireless Access Defined 294 Barriers to Growth 294 Security Issues in Public Hotspots 296 How Hotspots Are Organized 297 Subscribers 298 Access Points 299 Hotspot Controllers 300 Authentication Server 302 Different Types of Hotspots 303 Airports 303 Hotels 303 Coffee Shops 303 Homes 304 How to Protect Yourself When Using a Hotspot 305 Personal Firewall Software 305 Virtual Private Network (VPN) 306 Summary 308 Chapter 15 Known Attacks: Technical Review 311 Review of Basic Security Mechanisms 311 Confidentiality 3Í2 Integrity 314 Review of Previous IEEE 802.11 Security Mechanisms 316 Confidentiality 316 RC4andWEP 316 Integrity and Authentication 321 Attacks Against the Previous IEEE 802.11 Security Mechanisms 322 Confidentiality 322 Access Control 329 Authentication 330 Man-in-the-Middle Attacks 331 Management Frames 33 í ARP Spoofing 332 Problems Created by Man-in-the-Middle Attacks 333 802. lx and ΕΑΡ 333 PEAP 334 Denial-of-Service Attacks 334 Layer 2 Denial-of-Service Attacks Against All Wi-Fi-Based Standards 335 WPA Cryptographic Denial-of-Service Attack 335 Summary 336 Chapter 16 Actual Attack Tools 337 Attacker Goals 338 Process 338 Reconnaissance 338 Example Scenarios 345 Planning 346 Collection 348 Analysis 349 Execution 350 Other Tools of Interest 351 Airsnort 351 Airjack 352 Summary 353 Chapter 17 Open Source Implementation Example 355 General Architecture Design Guidelines 355 Protecting a Deployed Network 357 Isolate and Canalize 357 Upgrade Equipment's Firmware to WPA 351 What to Do If You Can't Do Anything 358 Planning to Deploy a WPA Network 359 Deploying the Infrastructure 360 Add a RADIUS Server for IEEE 802. IX Support 3 60 Use a Public Key Infrastructure for Client Certificates 360 Install Client IEEE 802. IX Supplicant Software 360 Practical Example Based on Open Source Projects 361 Server Infrastucture 361 Building an Open Source Access Point 3 74 Making It All Work 376 Summary 383 Acknowledgments 384 References and More Information 384 Appendixes 385 Appendix A Overview of the AES Block Cipher 387 Finite Field Arithmetic 388 Addition 389 Subtraction 390 Multiplication 390 Division 391 Galois Field GF() 392 Conclusion 397 Steps in the AES Encryption Process 398 Round Keys 399 Computing the Rounds 401 Decryption 403 Summary of AES 405 Appendix В Example Message Modification 407 Appendix С Verifying the Integrity of Downloaded Files 411 Checking the MD5 Digest 411 Checking the GPG Signature 412 Acronyms 417 References 421 Index 425
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publisher	Addison-Wesley
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spelling	Edney, Jon Verfasser aut Real 802.11 security Wi-Fi protected access and 802.11i Jon Edney and William A. Arbaugh 3. print. Boston ; Munich [u.a.] Addison-Wesley 2004 XXI, 451 S. Ill. txt rdacontent n rdamedia nc rdacarrier IEEE 802 11 (DE-588)4633968-1 gnd rswk-swf IEEE 802.11 (Standard) Wireless LANs Security measures Sicherheit (DE-588)4054790-5 gnd rswk-swf Lokales Netz (DE-588)4114441-7 gnd rswk-swf Drahtloses lokales Netz (DE-588)4633975-9 gnd rswk-swf Computersicherheit (DE-588)4274324-2 gnd rswk-swf Lokales Netz (DE-588)4114441-7 s Sicherheit (DE-588)4054790-5 s DE-604 Drahtloses lokales Netz (DE-588)4633975-9 s 1\p DE-604 Computersicherheit (DE-588)4274324-2 s 2\p DE-604 IEEE 802 11 (DE-588)4633968-1 u 3\p DE-604 Arbaugh, William A. Sonstige oth Digitalisierung UB Passau application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016546666&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis 1\p cgwrk 20201028 DE-101 https://d-nb.info/provenance/plan#cgwrk 2\p cgwrk 20201028 DE-101 https://d-nb.info/provenance/plan#cgwrk 3\p cgwrk 20201028 DE-101 https://d-nb.info/provenance/plan#cgwrk
spellingShingle	Edney, Jon Real 802.11 security Wi-Fi protected access and 802.11i IEEE 802 11 (DE-588)4633968-1 gnd IEEE 802.11 (Standard) Wireless LANs Security measures Sicherheit (DE-588)4054790-5 gnd Lokales Netz (DE-588)4114441-7 gnd Drahtloses lokales Netz (DE-588)4633975-9 gnd Computersicherheit (DE-588)4274324-2 gnd
subject_GND	(DE-588)4633968-1 (DE-588)4054790-5 (DE-588)4114441-7 (DE-588)4633975-9 (DE-588)4274324-2
title	Real 802.11 security Wi-Fi protected access and 802.11i
title_auth	Real 802.11 security Wi-Fi protected access and 802.11i
title_exact_search	Real 802.11 security Wi-Fi protected access and 802.11i
title_exact_search_txtP	Real 802.11 security Wi-Fi protected access and 802.11i
title_full	Real 802.11 security Wi-Fi protected access and 802.11i Jon Edney and William A. Arbaugh
title_fullStr	Real 802.11 security Wi-Fi protected access and 802.11i Jon Edney and William A. Arbaugh
title_full_unstemmed	Real 802.11 security Wi-Fi protected access and 802.11i Jon Edney and William A. Arbaugh
title_short	Real 802.11 security
title_sort	real 802 11 security wi fi protected access and 802 11i
title_sub	Wi-Fi protected access and 802.11i
topic	IEEE 802 11 (DE-588)4633968-1 gnd IEEE 802.11 (Standard) Wireless LANs Security measures Sicherheit (DE-588)4054790-5 gnd Lokales Netz (DE-588)4114441-7 gnd Drahtloses lokales Netz (DE-588)4633975-9 gnd Computersicherheit (DE-588)4274324-2 gnd
topic_facet	IEEE 802 11 IEEE 802.11 (Standard) Wireless LANs Security measures Sicherheit Lokales Netz Drahtloses lokales Netz Computersicherheit
url	http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=016546666&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
work_keys_str_mv	AT edneyjon real80211securitywifiprotectedaccessand80211i AT arbaughwilliama real80211securitywifiprotectedaccessand80211i

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