Sistem Terdistribusi - Exercise

 

EXERCISE 2.18 

 

Question: 

Describe possible occurrences of each of the main types of security threat (threats to processes, threats to communication channels, denial of service) that might occur in the Internet.

 

Answer:

Threats to processes: without authentication of principals and servers, many threats exist. An enemy could access other user’s files or mailboxes, or set up ‘spoof’ servers. E.g. a server could be set up to ‘spoof’ a bank’s service and receive details of user’s financial transactions.

Threats to communication channels: IP spoofing - sending requests to servers with a false source address, man-in-the-middle attacks.

Denial of service: flooding a publicly-available service with irrelevant messages.

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