Cryptography and Network Security offers the following features to facilitate learning:

• Throughout the book, refinements and revisions improve pedagogy and user-friendliness, in addition to substantive changes.
• A tremendous amount of original supporting material for students is available online, at two Web locations:
  • The Companion Web site
  • The Premium Content site
• Fundamental security design principles in Chapter 1 includes a section discussing the security design principles listed as fundamental by the National Centers of Academic Excellence in Information Assurance/Cyber Defense. This is jointly sponsored by the U.S. National Security Agency and the U.S. Department of Homeland Security.
• Attack surfaces and attack trees in Chapter 1 includes a new section describing these two concepts, which are useful in evaluating and classifying security threats.
• Email Security: Chapter 19 has been completely rewritten to provide a comprehensive and up-to-date discussion of email security. These discussions include:
  • Email threats and a comprehensive approach to email security.
  • How STARTTLS provides confidentiality and authentication for SMTP.
  • DNSSEC and its role in supporting email security.
  • DNS-based Authentication of Named Entities (DANE) and the use of this approach to enhance security for certificate use in SMTP and S/MIME.
  • Sender Policy Framework (SPF), the standardized way for a sending domain to identify and assert the mail senders for a given domain.
  • Domain-based Message Authentication, Reporting, and Conformance (DMARC), which allows email senders to specify policy on how their mail should be handled, the types of reports that receivers can send back, and the frequency those reports should be sent.
  • Treatment of S/MIME reflects the latest version 3.2.
  • DomainKeys Identified Mail (DKIM) is updated.
• The narrative throughout has been clarified and tightened while the illustrations are new and improved.
• UPDATED! Sage cryptographic algorithms provide numerous examples and are used as the basis for hands-on assignments, offering unmatched means for students to learn this subject.
• UPDATED! Comprehensive, up-to-date surveys of cryptographic algorithms provide an understanding of the important cryptographic algorithms and allow students to assess their relative strengths and weaknesses.
• UPDATED! Comprehensive, up-to-date coverage of IP Security, namely IPSec, one of the most complex and important of the new network security standards.
• UPDATED! A comprehensive and unified discussion of the threats of intruders (hackers) and viruses looks at the distinctions and similarities of the two. Students gain a greater understanding of both topics by exploring the both in the same chapter.
• UPDATED! The material on number theory is consolidated into a single chapter, Chapter 2. This makes for a convenient reference and relevant portions of it can be assigned as needed.
• UPDATED! The chapter on finite fields is updated and expanded with additional text and new figures to enhance understanding.
• UPDATED! The relatively new format-preserving encryption mode of encryption is covered in a new section in Chapter 7. The format is seeing increasing commercial success, which is covered thoroughly in the section.
• UPDATED! The user authentication model in Chapter 15 includes a new description of a general model for user authentication, which helps to unify the discussion of the various approaches.
• UPDATED! The material on cloud security in Chapter 16 is updated and expanded in the new edition to reflect its importance and recent develop