Lecture-Email-Security-4-19-10 - E l ectr oni c M a i l...

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Electronic Mail Security Ratan Guha CIS 3060 Security in Computing Spring 2010 4-19-10
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E-Mail Security 2 Resources Used Cryptography and Network Security, Fourth Edition, by William Stallings, Chapter 15
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E-Mail Security 3 Outline Outline Pretty Good Privacy Radix 64
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E-Mail Security 4 Pretty Good Privacy Philip R. Zimmerman is the creator of PGP. PGP provides a confidentiality and authentication service that can be used for electronic mail and file storage applications.
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E-Mail Security 5 Why Is PGP Popular? It is availiable free on a variety of platforms. Based on well known algorithms. Wide range of applicability Not developed or controlled by governmental or standards organizations
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E-Mail Security 6 Operational Description Consist of five services: Authentication Confidentiality Compression E-mail compatibility Segmentation
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E-Mail Security 7
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E-Mail Security 8 Compression PGP compresses the message after applying the signature but before encryption The placement of the compression algorithm
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