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Article #539185Re: SOLUTIONS MANUAL: Advanced Engineering Mathematics, 7th Ed by Peter V. O'Neil
From: Ahem A Rivets Shot
Date: Fri, 13 Apr 2018 14:08
Date: Fri, 13 Apr 2018 14:08
35 lines
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3268 bytes
On 13 Apr 2018 10:48:12 GMT Huge <Huge@nowhere.much.invalid> wrote: > On 2018-04-13, Ahem A Rivet's Shot <ste...@eircom.net> wrote: > > On Wed, 11 Apr 2018 15:25:58 +0100 > > Rob Morley <nos...@ntlworld.com> wrote: > > > >> On 11 Apr 2018 08:47:52 GMT > >> Jorgen Grahn <grahn...@snipabacken.se> wrote: > >> > >> > Someone (in rec.games.roguelike.nethack I think) suggested they > >> > may be steganographic messages. > >> > > >> Because changing the least-significant-bit doesn't garble ASCII at > >> all. ;-) > > > > Which is why you don't use that technique with ASCII. A really > > simple technique for ASCII involves varying spacing after full stops and > > commas. Use two spaces for a 1, one space for a 0. End the paragraph > > to end the number (9 in this case). > > Good luck with fitting any amount of data like that into a 23 word request > for a ripped off manual. It is a feature (deliberate part of the design) that steganography only provides a tiny fraction of the data used by the carrier. In the case of the original post the somewhat random selection of case, abbreviations and punctuation could carry a few bits - it doesn't take many to pass a useful message if the meanings are predefined. -- Steve O'Hara-Smith | Directable Mirror Arrays C:\>WIN | A better way to focus the sun The computer obeys and wins. | licences available see You lose and Bill collects. | http://www.sohara.org/
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