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  • CS406: Information Security (2018)
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  • Unit 1: Computer Security Concepts
  • Unit 2: Basic Cryptographic Concepts
  • Unit 3: Public-Key Encryption
  • Unit 4: Access Control Mechanisms
  • Unit 5: Security Solutions
  • Unit 6: Firewalls, Intrusion Detection, and Intrusion Prevention
  • Unit 7: Physical Security
  • Unit 8: Malicious Software and Software Security
  • Unit 9: Security Risk Management
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CS406: Information Security (2018)

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Back to course 'CS406: Information Security (2018)'
  • Unit 5: Security Solutions

    In this unit, we explore some of the common solutions for security issues that are currently in use. For securing web-based applications such as e-Commerce, Secure Sockets Layer (SSL) is a commonly used solution to enable security of transactions. It makes use of public-key based encryption and symmetric encryption during the transaction to ensure security. We also look into a protocol called Internet Protocol Security (IPSec) to secure communications.

    Completing this unit should take you approximately 5 hours.

    • Unit 5 Learning Outcomes Page
    • 5.1: Security Protocols and Solutions

      • Indian Institute of Technology, Kharagpur: Indranil Sengupta's "Basic Cryptographic Concepts" Page

        Watch this video about cryptographic concepts related to Secure Sockets Layer (SSL), Secure Shell (SSH), and Internet Protocol Security (IPSec).

    • 5.2: Internet Protocol Security

      • Gary C. Kessler's "An Overview of Cryptography: IP Security (IPSec) Protocol" URL

        Read section 5.6 about Internet Protocol for securing communications. After reading this section, describe the two modes for IPSec: AH and ESP. Also try to explain how to use AH and ESP to build VPN (tunnel mode and transport mode).

    • 5.3: Secure Sockets Layer

      • Gary C. Kessler's "An Overview of Cryptography: The SSL Family of Secure Transaction Protocols for the World Wide Web" URL

        Read section 5.7 about the SSL family of protocols for securing transactions over the Internet. When reading this section, please pay special attention to the diagram in Figure 5. You need to be able to explain the message flows in Figure 5 for SSL/TLS.

    • 5.4: Pretty Good Privacy

      • Gary C. Kessler's "An Overview of Cryptography: Pretty Good Privacy (PGP)" URL

        Read section 5.5 about Pretty Good Privacy (PGP), one of today's most widely used public-key cryptography programs.

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