csce201-email - CSCE201 CSCE201 EmailSecurity Fall2010...

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CSCE 201 CSCE 201 Email Security Email Security Fall 2010 Fall 2010
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CSCE 201 - Farkas 2 Electronic Mail Electronic Mail Most heavily used network-based application Over 210 billion per day Used across different architectures and platforms Send e-mail to others connected directly or indirectly to the Internet regardless of host operating systems and protocols NEED: Authentication Confidentiality
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CSCE 201 - Farkas 3 Why Email Security? Why Email Security? Message confidentiality Message integrity Sender authentication Nonrepudiation
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How email works? How email works? TCP sub-protocols: Simple Mail Transfer Protocol (SMTP): outgoing mail, port 25 Post Office Protocol (POP): incoming mail, port 110 CSCE 201 - Farkas 4 SMTP SMTP POP3 Sender Receiver Internet
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Internet Mail Access Protocol POP3: email is downloaded to the client’s computer and deleted from the server IMAP4: email remains on the server
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This note was uploaded on 12/13/2011 for the course CSCE 201 taught by Professor Staff during the Fall '10 term at South Carolina.

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csce201-email - CSCE201 CSCE201 EmailSecurity Fall2010...

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