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Lecture Network security: Chapter 29 - Dr. Munam Ali Shah

The topic discussed in this chapter are email security, pretty good privacy, secure/multipurpose internet mail extensions (S/MIME). In this chapter you would be able to present an understanding of how to secure email over the internet, you would be able demonstrate knowledge about PGP and its operation. | Network Security Lecture 29 Presented by: Dr. Munam Ali Shah Part 3 Internet Security (Last Part) Summary of the Previous Lecture We talked about what Internet security is and how to ensure security while browsing through the Internet. We also looked at what spyware are and how do they look like. We discussed few methods that can be used to avoid spywares. Lastly, we explored some examples of Phishing on the Internet Outlines of today’s lecture Email Security Pretty Good Privacy Why PGP is famous PGP Operating Message generation Message Reception Secure/Multipurpose Internet Mail Extensions (S/MIME) Objectives You would be able to present an understanding of how to secure Email over the Internet. You would be able demonstrate knowledge about PGP and its operation. Email Security email is one of the most widely used and regarded network services currently message contents are not secure may be inspected either in transit or by suitably privileged users on destination system 6 In . | Network Security Lecture 29 Presented by: Dr. Munam Ali Shah Part 3 Internet Security (Last Part) Summary of the Previous Lecture We talked about what Internet security is and how to ensure security while browsing through the Internet. We also looked at what spyware are and how do they look like. We discussed few methods that can be used to avoid spywares. Lastly, we explored some examples of Phishing on the Internet Outlines of today’s lecture Email Security Pretty Good Privacy Why PGP is famous PGP Operating Message generation Message Reception Secure/Multipurpose Internet Mail Extensions (S/MIME) Objectives You would be able to present an understanding of how to secure Email over the Internet. You would be able demonstrate knowledge about PGP and its operation. Email Security email is one of the most widely used and regarded network services currently message contents are not secure may be inspected either in transit or by suitably privileged users on destination system 6 In virtually all distributed environments, electronic mail is the most heavily used network-based application. But current email services are roughly like "postcards”, anyone who wants could pick it up and have a look as its in transit or sitting in the recipients mailbox. Email Security Enhancements With the explosively growing reliance on electronic mail for every conceivable purpose, there grows a demand for authentication and confidentiality services. What we want is something more akin to standard mail (contents protected inside an envelope) if not registered mail (have confidence about the sender of the mail and its contents). That is, the “classic” security services listed are desired. confidentiality protection from disclosure authentication of sender of message message integrity protection from modification non-repudiation of origin protection from denial by sender 7 With the explosively growing reliance on electronic mail for every conceivable purpose, there grows a demand for .