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El. knyga: Secure Messaging on the Internet

  • Formatas: 282 pages
  • Išleidimo metai: 31-Jan-2014
  • Leidėjas: Artech House Publishers
  • ISBN-13: 9781608077182
Kitos knygos pagal šią temą:
  • Formatas: 282 pages
  • Išleidimo metai: 31-Jan-2014
  • Leidėjas: Artech House Publishers
  • ISBN-13: 9781608077182
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Internet messaging (standard emails, chats, instant messages, etc) is inherently insecure. Several frameworks to reduce this insecurity have been proposed, but none has seen wide application,a nd there are problems with all of them. This book, a largely rewritten and expanded second edition of the previous Secure Messaging with PGP and S/MIME by the same author provides a much-needed overview of the state of secure messaging and describes several implementations in detail. After a description of the Internet Message Format, the author discusses various cryptographic techniques, certificate management and general issues with secure messaging (various attacks and points of implementation), before providing a detailed analysis of the strengths and shortcomings of the two main tools used to secure message exchanges (OpenPGP and S/MIME). Further chapters look at some of the more specific problems and solutions for web-based messaging, gateways and certified mail. A chapter on current state of research and open questions and a future outlook conclude the book. Several appendices cover encoding schemes, character sets and public key cryptography standards. Annotation ©2015 Ringgold, Inc., Portland, OR (protoview.com)
Preface xi
Acknowledgments xv
Chapter 1 Introduction 1(8)
Chapter 2 Internet Messaging 9(24)
2.1 Introduction
9(4)
2.2 Internet Message Format
13(8)
2.2.1 Header Section
14(4)
2.2.2 Message Body
18(1)
2.2.3 MIME
18(3)
2.3 Internet Messaging Protocols
21(8)
2.3.1 Message Transfer and Delivery
22(4)
2.3.2 Message Store Access
26(2)
2.3.3 Directory Access
28(1)
2.4 Final Remarks
29(4)
Chapter 3 Cryptographic Techniques 33(40)
3.1 Introduction
33(9)
3.1.1 Preliminary Remarks
33(2)
3.1.2 Cryptographic Systems
35(2)
3.1.3 Classes of Cryptographic Systems
37(1)
3.1.4 Secure Cryptosystems
38(3)
3.1.5 Historical Background Information
41(1)
3.2 Cryptosystems Overview
42(25)
3.2.1 Unkeyed Cryptosystems
43(5)
3.2.2 Secret Key Cryptosystems
48(6)
3.2.3 Public Key Cryptosystems
54(13)
3.3 Final Remarks
67(6)
Chapter 4 Certificate Management 73(18)
4.1 Introduction
73(5)
4.2 X.509 Certificates
78(6)
4.2.1 Certificate Format
78(3)
4.2.2 Hierarchical Trust Model
81(3)
4.3 OpenPGP Certificates
84(2)
4.3.1 Certificate Format
84(1)
4.3.2 Cumulative Trust Model
85(1)
4.4 Final Remarks
86(5)
Chapter 5 Secure Messaging 91(12)
5.1 Threats and Attacks
91(6)
5.1.1 Passive Attacks
92(2)
5.1.2 Active Attacks
94(3)
5.2 Secure Messaging
97(3)
5.2.1 What Does "Secure Messaging" Mean?
97(2)
5.2.2 How Can "Secure Messaging" Be Implemented?
99(1)
5.3 Final Remarks
100(3)
Chapter 6 OpenPGP 103(46)
6.1 Origins and History
103(3)
6.2 Technology
106(24)
6.2.1 Preliminary Remarks
106(2)
6.2.2 Key ID
108(1)
6.2.3 Message Format
109(5)
6.2.4 PGP/MIME
114(3)
6.2.5 Supported Algorithms
117(5)
6.2.6 Message Processing
122(6)
6.2.7 Cryptographic Keys
128(2)
6.3 Web of Trust
130(11)
6.3.1 Keyrings
130(2)
6.3.2 Trust Establishment
132(5)
6.3.3 Key Revocation
137(2)
6.3.4 Key Servers
139(2)
6.4 Security Analysis
141(3)
6.4.1 Specification
141(1)
6.4.2 Implementations
142(2)
6.5 Final Remarks
144(5)
Chapter 7 S/MIME 149(26)
7.1 Origins and History
149(3)
7.2 Technology
152(18)
7.2.1 Message Formats
153(9)
7.2.2 Cryptographic Algorithms
162(4)
7.2.3 Attributes
166(1)
7.2.4 Enhanced Security Services
167(3)
7.3 Certificates
170(1)
7.4 Security Analysis
171(1)
7.5 Final Remarks
172(3)
Chapter 8 Web-Based Messaging 175(8)
8.1 Introduction
175(2)
8.2 Service Providers
177(3)
8.3 Final Remarks
180(3)
Chapter 9 Gateway Solutions 183(8)
9.1 Introduction
183(2)
9.2 Products and Solutions
185(3)
9.2.1 Totemomail Encryption Gateway
186(1)
9.2.2 SEPPmail
187(1)
9.3 Final Remarks
188(3)
Chapter 10 Certified Mail 191(14)
10.1 Introduction
191(3)
10.2 Solutions
194(6)
10.2.1 Ad Hoc Solutions
194(3)
10.2.2 TTP-Based Solutions
197(3)
10.3 Message Delivery Platforms
200(1)
10.4 Final Remarks
201(4)
Chapter 11 Instant Messaging 205(10)
11.1 Introduction
205(2)
11.2 IM Security
207(3)
11.3 Off-the-Record Messaging
210(3)
11.4 Final Remarks
213(2)
Chapter 12 Research Challenges and Open Questions 215(6)
12.1 Spam Protection
215(2)
12.2 P2P Principles and Technologies
217(2)
12.3 New Approaches and Architectures
219(2)
Chapter 13 Conclusions and Outlook 221(4)
Appendix A Character Sets 225(4)
A.1 ASCII
225(2)
A.2 ISO/IEC 8859
227(1)
A.3 Unicode
227(1)
A.4 ISO/IEC 10646-1, UCS, and UTF-8
228(1)
Appendix B Transfer Encoding Schemes 229(8)
B.1 Quoted-Printable
229(1)
B.2 UU
230(4)
B.3 Base-64
234(1)
B.4 Radix-64
235(2)
Appendix C ASN.1 and Encoding Rules 237(10)
C.1 ASN.1-X.680
237(6)
C.1.1 Simple Types
239(2)
C.1.2 Structured Types
241(1)
C.1.3 Tagged Types
242(1)
C.1.4 Other Types
243(1)
C.2 Encoding Rules-X.690
243(4)
Appendix D Public Key Cryptography Standards 247(4)
Abbreviations and Acronyms 251(6)
About the Author 257(2)
Index 259
Rolf Oppliger is an adjunct professor of computer science at the University of Zurich, Switzerland. He earned his Ph.D. in computer science from the University of Berne, Switzerland.