9. Explain the difference between IDS and Firewalls a. Bob has received a message from Alice. The message is encrypted with Bob's public key (that Alice has obtained from a Certification Authority (CA)). Bob can read the message after decrypting it with his private key. What does Bob now for sure? b. If Alice wants to send an email with confidentiality, message integrity and sender authentication, what keys does she have to use and what steps does she have to take? c. Is using public / private key encryption is more secure than using symmetric key encryption?
9. Explain the difference between IDS and Firewalls a. Bob has received a message from Alice. The message is encrypted with Bob's public key (that Alice has obtained from a Certification Authority (CA)). Bob can read the message after decrypting it with his private key. What does Bob now for sure? b. If Alice wants to send an email with confidentiality, message integrity and sender authentication, what keys does she have to use and what steps does she have to take? c. Is using public / private key encryption is more secure than using symmetric key encryption?
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Transcribed Image Text:9. Explain the difference between IDS and Firewalls
a. Bob has received a message from Alice. The message is encrypted with Bob's public
key (that Alice has obtained from a Certification Authority (CA)). Bob can read the
message after decrypting it with his private key. What does Bob now for sure?
b. If Alice wants to send an email with confidentiality, message integrity and sender
authentication, what keys does she have to use and what steps does she have to
take?
c. Is using public / private key encryption is more secure than using symmetric key
encryption?
d. Why do we also use symmetric key encryption?
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