On Tue, 4 Oct 2011 at 4:39pm, Robert G. Brown wrote > On Tue, 4 Oct 2011, Chi Chan wrote: > >> On Tue, Oct 4, 2011 at 11:58 AM, Rayson Ho <raysonlo...@gmail.com> wrote: >>> BTW, I've heard horror stories related to routing errors with this >>> method - truck drivers delivering wrong tapes or losing tapes >>> (hopefully the data is properly encrypted). >> >> I just read this on Slashdot today, it is "very hard to encrypt a >> backup tape" (really?): >> >> http://yro.slashdot.org/story/11/10/04/1815256/saic-loses-data-of-49-million-patients > > Not if it is encrypted with a stream cipher -- a stream cipher basically > xors the data with a bitstream generated from a suitable key in a > cryptographic-strength pseudorandom number generator (although there are > variations on this theme). As a result, it can be quite fast -- as fast > as generating pseudorandom numbers from the generator -- and it produces > a file that is exactly the size of the original message in length.
For added "no, it's not hard, they're apparently just not very bright" value, LTO4+ includes hardware AES encryption. -- Joshua Baker-LePain QB3 Shared Cluster Sysadmin UCSF _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
