Slave Keys

If I make a slave key on my main and pass it to an alt on another account (without attuning it), can that alt then attune the slave key to an alt on the main account? or can it only be attuned by the character that made the key?
Telcular wrote:The time to login is very quick, and if you just close the game by pressing the X, then your char stays logged in for abit, around a minute or so i think.
The way i´ve done it, is have the 2 characters logged off at the same place, log in on the toon that needs a key, and then press the X to close down.
Then instantly start up the game again and log into the main toon. If you´re quick, there should be plenty of time to attune the key to your other char while it´s slowly logging out.
Then you just place the now-attuned key somewhere, log over to the slave char again and pick up the key, and done.