Explain the difference between IDS and Firewalls.

QuestionsCategory: QuestionsExplain the difference between IDS and Firewalls.
Helena asked 6 months ago
  1. 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 know for sure?
  2. If Alice want 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?
  3. Is using public / private key encryption more secure than using symmetric key encryption?
  4. Why do we also use symmetric key encryption?