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File by file encryption instead of filesystem encryption
- From: Kelly Jones <kelly dot terry dot jones at gmail dot com>
- To: cygwin at sourceware dot org
- Date: Sat, 23 May 2009 09:47:24 -0700
- Subject: File by file encryption instead of filesystem encryption
Are there any cygwin/Windows programs that will encrypt a file, but
leave it usable, similar to what TrueCrypt does for filesystems?
TrueCrypt takes a large file (call it "encryptfs") and mounts it on a
drive (call it "M:"). After you enter your passphrase, Windows sees M:
as a normal drive.
However, encryptfs is still encrypted, and you can copy it to make
encrypted backups.
This is great in theory, but has some problems in practise:
% Even w/ rsync, even using --partial, copying over a large file is
slow and prone to errors.
% You have to unmount "encryptfs" to back it up; otherwise, Windows
says the file is busy.
So, I was looking for a file-by-file solution, where "encrypt1" would
be an encrypted file, and "myfile" would be a psuedo-file based on
encrypt1 that Windows would see as a regular file.
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