On Thu, 18 Nov 1993, Matthew J Ghio wrote:
tcmay@netcom.com (Timothy C. May) wrote:
Also an argument for using stegonography, to obscure the fact that one has encrypted files. Companies or universities may have simplistic policies banning encrypion as a matter of policy, for various and sundry reasons, and may snoop through networked machines looking for encrypted files (high entropy, characteristic file types, etc.).
Packing those sensitive resumes and job applications in an innocent photo of the dean may be a good idea.
Actually, you could fool a lot of people by creating a hidden disk partition. Nobody would know there was anything hidden unless they did a detailed sector-scan of the disk. Is there any good software for doing this with modern operating systems? It used to be real easy to do stuff like that in the old days when OS were simple and hackable. Once someone showed me a trick on an old, old, Apple DOS; you could change one byte in RAM, and viola, a totally new directory appeared on the disk! Pretty cute trick. Too bad things ain't that simple anymore. :)
Ah, but they are, on mac anyways...pop open ResEdit (available from ftp.apple.com or in most book stores or development packages), choose 'get file/folder info' from the file menu, and pick any directory in a standard dir/file browser which comes up. When the info box comes up, just click in the 'invisible' box. When u exit ResEdit, it will ask u if u want to save changes. Click 'yes', and...voila...an invisible subdirectory. Many programs make this interface even easier, too. Jim Wise wisej@acf4.edu jaw7254@acfcluster.nyu.edu