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Security, Digital Certificates, Digital Signature, X (Vulnerabilities) -…

- - - - Threats
        
        thing that poses danger to an asset
        
        in terms of
- - - - Scanning
        
        Gain Access
        
        Maintain Access
        
        Covering tracks
        
        remain undetected
        
        ownership of system
        
        exploit the system
        
        network with for ports or apps
      - gather information
  - - - influence the behaviour of group of people like tricking someone to gain information
    - - A fake web page which looks exactly like a popular website
    - - a hacker takes over a session between you and another individual
    - - involves someone from the inside
    - - sends more data to an application than is expected.
    - - Dictionary attack
        
        Hybrid attack.
      - Brute-force attack
    - - modifies the source address to appear as someone else
- - - - prevent or allow access based on ip address or MAC address
    - - all incoming packets must be a response to a request
  - - - watch the network and if there is a bad traffic flow it send alarm
    - - Stops the bad traffic flow
        
        Signature-based
        
        perfect match
        
        Anomalyy-based
        
        based line of what is normal
        
        Behavior-based
        
        observe and report
  - - - same key for encryption and decryption
    - - 2 keys one public for encryption and the other private for decryption