Hiding out in plaintext : covert messaging with bitwise summations
نویسندگان
چکیده
vi CHAPTER 1. GENERAL INTRODUCTION 1 1.1 Problem Statement 1 1.2 Thesis Organization 1 1.3 Overview of Network Covert Channels 2 1.4 Overview of Information Hiding in TCP/IP 3 1.5 Network Layer 5 1.5.1 Do not Fragment Bit 5 1.5.2 IP Identification Field 6 1.5.3 IP Header Checksum 6 1.5.4 ICMP Data 6 1.6 Transport Layer 7 1.6.1 TCP Time Stamps 7 1.6.2 Sequence and Acknowledgment Fields 9 1.7 Active Wardens 9 1.7.1 Active Wardens – Unstructured Carriers 10 1.7.2 Active Wardens – Structured Carriers 10 1.8 Application Layer 11 1.8.1 Network Drives 12 1.8.2 Word Synonyms 12 1.8.3 DNS Namelookup/Reply 13 1.8.4 SSH 13 1.8.5 Software 15 1.8.6 HTTP Queries 16 1.9 Network Traffic Analysis Metrics 18 CHAPTER 2. HYPOTHESIS 20 2.1 Hypothesis Overview 20 2.2 Bitwise Summation Theory 21 2.2.1 Practical Bandwidth Limitations 23 2.2.2 Effect of Syntax and Semantics 23 2.2.3 Ad-Hoc Interval Method 24 2.2.4 Cryptographic (Blind) Interval Method 24 CHAPTER 3. METHODS 26 3.1 Data Sample 26
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تاریخ انتشار 2005