The Osiris Reversal Index can you take it back? Every Osiris market action sorted by how long you have to take it back.
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A browser left open on a shared machine

Minutes to undo

Walking away is the action. Not opening the page, not signing in, but standing up and leaving a machine other people can reach. The gap lasts as long as nobody touches it, and that is a length you do not choose.

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Printed as supplied, in no order. Nothing here is watched or timed, so an address that loads is not proof of anything. More about the set

1.The action is leaving, not opening

Everything you did at that desk was ordinary. Signing in was ordinary. The part that created an exposure was standing up, which is worth naming because people do not count it as a decision.

It also means the fix here is physical first and technical second, which is the reverse of most entries in this section.

Window opens
The moment you leave the machine.
Window closes
When you get back, or when somebody else sits down.
What closes it
A person. This is the entry where it is literally footsteps.
Still possible after
Ending the sessions from elsewhere and repairing what was readable.

2.Get back to it, or get in front of it

  1. If the machine is a minute away, go there. Nothing on this list beats arriving first.
  2. If it is not, sign in from a device you control and end every session the account will let you end.
  3. Change the password, which on many systems ends the rest of them.
  4. When you reach the machine, sign out properly, clear the history and close the browser rather than the tab.

Distance decides the order. If you can walk there, walking there is the whole fix. If you cannot, the token is what you can still reach, and that is covered under a session you think is still yours.

Read nextA session you think is still yoursThe half of this problem that travels beyond the room.

3.Locked is not closed

A locked screen stops a passer-by. It does not stop somebody with the machine password, and it ends not one of the sessions running behind it. Everything is still open. It is open behind a door.

A closed laptop with the browser shut is a different thing. The sessions may survive a restart, but nothing is running, nothing is on screen, and no logged-in view is waiting for the first person who taps a key.

Worth stopping forThe common version of this is not a stranger. It is somebody who knows you, sitting down at a machine they were entitled to use, seeing a page you would never have shown them. Nothing was attacked. It was left open.

4.What is left behind besides history

  • Open tabs, which say more than a history list because they say what you were in the middle of.
  • The download folder, which nobody clears and which keeps filenames long after the file is gone.
  • Autofill entries, offered to the next person as soon as they touch a box.
  • Bookmarks, which outlast all of it and get an entry of their own.

5.Two states people treat as one

The first belief is that a locked screen and a closed laptop amount to the same thing. They are two states with two different failure modes, and only one of them has nothing running.

The second is that history is the only thing left behind. History is the trace people know how to clear, which is why it is the least interesting one on the machine. Tabs, downloads and autofill say more, and clearing history reaches none of them.

Also usefulA screenshot you keptThe trace that survives every clear you will ever run.

6.If somebody has already sat down

Assume they read rather than acted, because reading is free and acting is not. Work out what was on screen and what was one click away. Change the password from elsewhere. Then think about what you say to them, since that conversation goes better when you start it. The rest is under what is still possible once a window has shut.

A lock screen is a door in front of a running room.

Behind it everything is live: the tabs, the sessions, the half-typed boxes. The lock keeps out somebody with no password and nothing else, and it never once ends a session.

Questions people send in

Is a private window enough on a shared machine?

It helps with history and saved values. It does nothing about the session that is live on screen while you are away from the desk.

Can I clear the history from another machine?

No. History is local, which is why ending the sessions is the part you can do at a distance and the part worth doing first.

How long is too long to leave it?

There is no number. The boundary is somebody sitting down, and only the room can tell you how likely that is in the next five minutes.