Encryting both file contents and file name with GnuPG
atom at smasher.org
Sun Jan 2 16:35:18 CET 2011
On Sun, 2 Jan 2011, Neil Phillips wrote:
> i was hoping to do the following;
> locate a source file.
> place the name of the source file in a log.
> encrypt the source file name and contents
> add to the log the name of the encrypted file.
> that way i have a list which tells me what the real name of the file is.
> i can use the log to pick which file i want to decrypt.
just hash the file-name.
SHA1 ("secret-1.txt") = d422b71f32b06168db114638fa9778c42d7d0f3c
SHA1 ("secret-2.txt") = d0ab019ba1975dab7c100bc5b4efa020bcd86a5d
SHA1 ("secret-3.txt") = 753b2bd68f7ff5fc44f9142245039375a3a5b2f8
use the hash as the encrypted file name. feel free to add a dot-suffix.
keep that reference in a db or text file and you can recover the original
if you're concerned that the name and/or format of the original file names
are too predictable, concatenate the filename with a "secret" before
SHA1 ("secret-1.txt:secret") = df3d0b4eb1034f7392c60baec6137c62a2d4579a
SHA1 ("secret-2.txt:secret") = 39238faa73f2472e253d5f096b28c8b31c8e8a00
SHA1 ("secret-3.txt:secret") = 9450a1f9cd93a47c8d3621cb7fc3ca0ec1df47b7
762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
"Sometimes I think we're alone in the universe,
and sometimes I think we're not.
In either case the idea is quite staggering."
-- Arthur C. Clarke
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