Questions on information systems?

why can't you find information online about a particular student? When you google a students name, how come there is no information about that person, no school records or anything from school?

I'm doing a report on school information systems and how schools ensure that no data is leaked onto the internet.

How does the school protect data from third parties and what is done to prevent hackers?

What type of securities are in place to avoid having malware downloaded?

What is done to ensure that the school computer system is not vulnerable?

How is data entered/manipulated into the school information system? Who is in charge of it? How is it done? Are only passwords required? What is done to make sure that data ENTERED is correct and filed in the right compartments eg under the student concerned and not someone else?

Also, what are the advantages and disadvantages of information systems?

What should I talk about for file management and back up procedures?

Most importantly,what is 'Input storage retrieval and manipulation of data within an information system' and what should i talk about.

What are the legal and ethical issues that school have to deal with for keeping/distributing/ storing personal information about students.

Please be as detailed as you can. It would be even better if you could back it up with evidence and give examples.

Your help is hugely appreciated!