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A comment on Reading privileged memory with a side-channel. Parent comment

Re:Reading privileged memory with a side-channel by pgt on Friday January 05, 2018 @01:12PM (#16080365)
I don't understand this explanation :/ Why is the room considered restricted if you can go inside? Do I know how all books that exist in the library? How does the order of the thrown out books pertain to the secret book?
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Re:Reading privileged memory with a side-channel by ohazi on Saturday January 06, 2018 @04:21AM (#16084535)
> Why is the room considered restricted if you can go inside?

That's the bug. The guard only checks to see whether you're supposed to have access after you walk in and start (speculatively) rearranging books. One way to fix this bug would be to have the guard check your access at the door.

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