Puzzle of the Day

A hypothetical computer science department povides a Hypothetical Computer Science Instructional Facil-
ity. 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 sec-
ond student reads the first studentēs program.

1.	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?

2.	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, 
how?

3.	If the first student told the second student to Ņfeel free to look at my answer, just donēt copy it,æ would 
your answer to part 1 change? If so, how?