On Sat, Mar 21, 2015 at 8:37 PM, Lee <[email protected]> wrote: > On 3/21/15, James A. Donald <[email protected]> wrote: >> On 2015-03-22 10:34, James A. Donald wrote: >>> On 2015-03-22 06:13, Lee wrote: >>>> Would a commonly available large binary file make a good one-time pad? >>>> Something like ubuntu-14.10-desktop-amd64.iso12 maybe.. >> >> I wrote: >>> Before you asked the question, probably would have made a good one time >>> pad. >>> >>> Not any more. >> >> Of course, it was never really a one time pad, merely security by >> obscurity - which is quite good, until it is quite bad. > > How is a one time pad not security by obscurity? As soon as the > opponent gets a copy it's game over.
So you're looking for a crypto system which is secure against an attacker having a copy of the key? _______________________________________________ cryptography mailing list [email protected] http://lists.randombit.net/mailman/listinfo/cryptography
