DiscusiionSUBJECT: Cryptography
DISCUSSION
Review attached pdf document.
After reading chapter 19, determine the impact that cryptography plays on email exchange. Should a company encrypt their email traffic and what would be the disadvantage for encrypting the data
Make sure to cover 300 words and 2 references
Stallings_8e_Accessibl
e_fullppt_19.pdf
Cryptography and Network Security:
Principles and Practice
Eighth Edition
Chapter 19
Electronic Mail Security
Copyright © 2020 Pearson Education, Inc. All Rights Reserved.
Copyright © 2020 Pearson Education, Inc. All Rights Reserved.
Figure 19.1 Function Modules and Standardized
Protocols Used between them in the Internet Mail
Architecture
Copyright © 2020 Pearson Education, Inc. All Rights Reserved.
Email Protocols
• Two types of protocols are used for transferring email:
– Used to move messages through the Internet from
source to destination
▪ Simple Mail Transfer Protocol (SMTP)
– Used to transfer messages between mail servers
▪ IMAP and POP are the most commonly used
Copyright © 2020 Pearson Education, Inc. All Rights Reserved.
SMTP
• Simple Mail Transfer Protocol
• Is a text-based client-server protocol
• Encapsulates an email message in an envelope and is
used to relay the encapsulated messages from source to
destination through multiple MTAs
• Was originally specified in 1982 as RFC 821
• The term Extended SMTP (ESMTP) is often used to refer
to later versions of SMTP
Copyright © 2020 Pearson Education, Inc. All Rights Reserved.
Mail Access Protocols
POP3
• Post Office Protocol
• Allows an email client to
download an email from
an email server (MTA)
• POP3 user agents
connect via TCP to the
server
• After authorization, the UA
can issue POP3
commands to retrieve and
delete mail
IMAP
Internet Mail Access
…
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