Hi, this is really not something cryptsetup does. There is some application or script that your distribution uses to implement this functionality, so you have to look there. Cryptsetup stores the master-key in kernel-memory while the LUKS container is mapped (open) and wipes it from memory on luksClose. Cryptsetup never stores the passphrase. You can get the master-key from a mapped device from the kernel (as root), though. FAQ Item 6.10 explains how. (http://code.google.com/p/cryptsetup/wiki/FrequentlyAskedQuestions) Arno On Mon, Dec 08, 2014 at 13:06:14 CET, Jian-Ming Zheng wrote: > Hi, > > When I attach a hard disk with LUKS encrypted partition to a Linux > machine, a window will pop up and a password or passphrase is required > to unlock the encrypted partition. In addition to forget passphrase > immediately, I can choose to 1) remember passphrase until I logout or > 2) remember forever. I am curious about where the entered passphrase > is kept in the two cases? > > Thanks. > _______________________________________________ > dm-crypt mailing list > dm-crypt@xxxxxxxx > http://www.saout.de/mailman/listinfo/dm-crypt -- Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@xxxxxxxxxxx GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 ---- A good decision is based on knowledge and not on numbers. -- Plato If it's in the news, don't worry about it. The very definition of "news" is "something that hardly ever happens." -- Bruce Schneier _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
