Overview

Signal and Messaging Layer Security is a comprehensive guide to signal protocol. Used by widely deployed messengers such as Facebook Messenger, WhatsApp, Wire, Viber, and many others, Signal has become the standard for end-to-end encrypted (E2EE) communication. Despite its widespread adoption, the protocol remains largely unexplained in security literature. This book fills that gap by providing a clear, accessible explanation of the Signal protocol for security professionals with a basic understanding of cryptography.   Beyond the Signal protocol, the book also addresses the crucial challenge of scaling E2EE messaging to group communication. While Signal was designed for two-party messaging, extending its security guarantees to large groups is a complex problem. The second focus of this book is the Messaging Layer Security (MLS) protocol, currently being standardized by the Internet Engineering Task Force (IETF.) MLS is designed for large-scale deployments, enabling secure group messaging for thousands of participants.   By exploring both Signal and MLS, this book offers a deep dive into the protocols shaping secure communication today. It provides a clear and comprehensive guide to understanding the core principles behind modern E2EE messaging. Readers will gain an understanding of forward secrecy, post-compromise security, and the intricacies of encrypted messaging in both one-on-one and group settings making it an essential resource for anyone working in the field of secure communications.

Full Product Details

Author:   Rolf Oppliger
Publisher:   Artech House Publishers
Imprint:   Artech House Publishers
Edition:   Unabridged edition
Dimensions:   Width: 15.20cm , Height: 2.20cm , Length: 22.90cm
Weight:   0.649kg
ISBN:  

9781685690618

ISBN 10:   1685690610
Pages:   304
Publication Date:   31 May 2025
Audience:   Professional and scholarly ,  Professional & Vocational
Format:   Hardback
Publisher's Status:   Active
Availability:   In Print  
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Table of Contents

Chapter 1 Introduction 1.1 Problem Statement 1.2 Historical Summary 1.3 Book Outline   Chapter 2 Cryptographic Toolbox 2.1 Unkeyed Cryptosystems 2.2 Secret Key Cryptosystems 2.3 Public Key Cryptosystems 2.4 Final Remarks   Chapter 3 Evolution 3.1 Phase 1: First Solutions 3.2 Phase 2: Synchronous Messaging 3.3 Phase 3: Asynchronous Messaging 3.4 Phase 4: Group Messaging 3.5 Final Remarks   Chapter 4 Signal Protocol 4.1 Introduction 4.2 X3DH 4.3 PQXDH 4.4 Double Ratchet Mechanism 4.5 User Authentication 4.6 Security Analysis 4.7 Final Remarks   Chapter 5 Group Communication 5.1 Introduction 5.2 Signal Protocol in Groups 5.3 Sender Keys 5.4 More Efficient Technologies and Protocols 5.5 Final Remarks   Chapter 6 MLS Protocol 6.1 Introduction 6.2 Architectural Setting 6.3 Protocol 6.4 Security Analysis 6.5 Final Remarks   Chapter 7 Further Developments and Improvements 7.1 Multi-Device Support 7.2 Cloud Storage 7.3 Self-Destructing Messages 7.4 Private Groups 7.5 Message Franking 7.6 Meta-Data Hiding   Chapter 8 Conclusions and Outlook   Chapter A ECC   Chapter B Quantum Computers and PQC B.1 Quantum Computers B.2 PQC   Chapter C Mathematical Notation   Chapter D Abbreviations and Acronyms   About the Author

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Author Information

Rolf Oppliger Rolf Oppliger leads eSECURITY Technologies, works for the Swiss federal administration, serves as an adjunct professor of computer science at the University of Z, rich, Switzerland, and is the Information Security and Privacy editor at Artech House. He earned his Ph.D. in computer science from the University of Berne, Switzerland.

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