End-to-End Encrypted Messaging

End-to-End
Encrypted Messaging
	Contents
	Preface
	Acknowledgments
	Chapter 1
Introduction
		References
	Chapter 2
Internet Messaging
		2.1 INTRODUCTION
		2.2 E-MAIL
			2.2.1 Internet Message Format
			2.2.2 E-Mail Protocols
		2.3 INSTANT MESSAGING
		2.4 FINAL REMARKS
		References
	Chapter 3
Cryptographic Techniques
		3.1 INTRODUCTION
			3.1.1 Cryptology
			3.1.2 Cryptographic Systems
			3.1.3 Historical Background Information
		3.2 CRYPTOSYSTEMS
			3.2.1 Unkeyed Cryptosystems
			3.2.2 Secret Key Cryptosystems
			3.2.3 Public Key Cryptosystems
		3.3 CERTIFICATE MANAGEMENT
			3.3.1 Introduction
			3.3.2 X.509 Certif cates
			3.3.3 OpenPGP Certif cates
			3.3.4 State of the Art
		3.4 FINAL REMARKS
		References
	Chapter 4
Secure Messaging
		4.1 THREATS AND ATTACKS
			4.1.1 Passive Attack
			4.1.2 Active Attacks
		4.2 ASPECTS AND NOTIONS OF SECURITY
		4.3 FINAL REMARKS
		References
	Chapter 5
OpenPGP
		5.1 ORIGINS AND HISTORY
		5.2 TECHNOLOGY
			5.2.1 Preliminary Remarks
			5.2.2 Key ID
			5.2.3 Message Format
			5.2.4 PGP/MIME
			5.2.5 Cryptographic Algorithms
			5.2.6 Message Processing
			5.2.7 Key Management
		5.3 WEB OF TRUST
			5.3.1 Keyrings
			5.3.2 Trust Establishment
			5.3.3 Key Revocation
			5.3.4 Key Servers
		5.4 SECURITY ANALYSIS
			5.4.1 Specif cation
			5.4.2 Implementations
		5.5 FINAL REMARKS
		References
	Chapter 6
S/MIME
		6.1 ORIGINS AND HISTORY
		6.2 TECHNOLOGY
			6.2.1 Message Formats
			6.2.2 Cryptographic Algorithms
			6.2.3 Signer Attributes
			6.2.4 Enhanced Security Services
		6.3 CERTIFICATES
		6.4 SECURITY ANALYSIS
		6.5 FINAL REMARKS
		References
	Chapter 7
Evolutionary Improvements
		7.1 WKD AND WKS
		7.2 DNS-BASED DISTRIBUTION OF PUBLIC KEYS
		7.3 OPPORTUNISTIC ENCRYPTION
			7.3.1 Autocrypt
			7.3.2 p≡p
		7.4 WEB-BASED SOLUTIONS
		7.5 FINAL REMARKS
		References
	Chapter 8
OTR
		8.1 ORIGINS AND HISTORY
		8.2 TECHNOLOGY
			8.2.1 OTR AKE
			8.2.2 Diff e-Hellman Ratchet
			8.2.3 Message Processing
		8.3 SECURITY ANALYSISIn 2011, a group of researchers from
		8.4 FINAL REMARKS
		References
	Chapter 9
Signal
		9.1 ORIGINS AND HISTORY
		9.2 TECHNOLOGY
			9.2.1 Key Agreement and Session Establishment
			9.2.2 Double Ratchet Mechanism
			9.2.3 Authentication Ceremony
			9.2.4 Group Messaging
		9.3 SECURITY ANALYSIS
		9.4 IMPLEMENTATIONS
			9.4.1 Viber
			9.4.2 Wire
			9.4.3 Riot
		9.5 FINAL REMARKS
		References
	Chapter 10
WhatsApp
		10.1 ORIGINS AND HISTORY
		10.2 IMPLEMENTATION DETAILS
			10.2.1 Transport Layer Security and Complementary Technologies
			10.2.2 Cryptographic Algorithms and Key Generation
			10.2.3 Message Attachments
			10.2.4 Group Messaging
		10.3 SECURITY ANALYSIS
		10.4 FINAL REMARKS
		References
	Chapter 11 Other E2EE Messengers
		11.1 IMESSAGE
		11.2 WICKR
		11.3 THREEMA
		11.4 TELEGRAM
		References
	Chapter 12
Privacy Issues
		12.1 INTRODUCTION
		12.2 SELF-DESTRUCTING MESSAGING
		12.3 ONLINE PRESENCE INDICATION
		12.4 FINAL REMARKS
		References
	Chapter 13
Conclusions and Outlook
		References
	Appendix A
Mathematical Notation
	Appendix B
Abbreviations and Acronyms
	About the Author
	Index