Alice can read and write to the file x can read the file y a

Alice can read and write to the file x, can read the file y, and can execute the file z. Bob can read x, can read and write to y, and cannot access z.

Write a set of access control lists for this situation. Which list is associated with which file?

Write a set of capability lists for this situation. With what is each list associated?

Solution

1.

File x- Alice: read and write; Bob: read.

File y- Alice: read; Bob: read and write.

File z- Alice: execute.

Each list is associated with the object

2.

Alice’s capabilities:

File x:read,write

File y:read

File z:execute

Bob’s capabilities:

File x: read;

File y:read, write;