A hypothetical computer science department povides a Hypothetical
Computer Science Instructional Facility. Students do their homework on
the HCSIF computers. Suppose a student in a beginning programming class
writes a program but fails to use the protection mechanisms to prevent
others from reading it. A second student reads the first student's
If the security policy of the HCSIF says that students are not allowed
to read homework-related files from other students, has the second
student violated security? Has the first?
If the first student had used the protection mechanisms to prevent
other students from reading the file, but the second student figured
out a way to read the file, would your answer to part 1 change? If so,
If the first student told the second student to "feel free
to look at my answer, just don't copy it," would your answer to
part 1 change? If so, how?
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Page last modified on 1/23/97