Assuming you are on Debian/Ubuntu, install encfs

$apt-get install encfs  Simply run $ encfs ~/PATH/TO/ENCRYPTED_FOLDER ~/PATH/TO/FOLDER


to create an encrypted version of a folder

$encfs ~/ENCFS/ENC/ ~/ENCFS/CLEAR/ Creating new encrypted volume. Please choose from one of the following options: enter "x" for expert configuration mode, enter "p" for pre-configured paranoia mode, anything else, or an empty line will select standard mode. ?> p Paranoia configuration selected. Configuration finished. The filesystem to be created has the following properties: Filesystem cypher: "ssl/aes", version 3:0:2 Filename encoding: "nameio/block", version 3:0:1 Key Size: 256 bits Block Size: 1024 bytes, including 8 byte MAC header Each file contains 8 byte header with unique IV data. Filenames encoded using IV chaining mode. File data IV is chained to filename IV. File holes passed through to ciphertext. New Encfs Password: Verify Encfs Password:  Then copy a few files into CLEAR (the unencrypted folder), you can see there is the same number and size of files in the encrypted folder ./CLEAR: total 19M -rw-r----- 1 thattommyhall thattommyhall 5.5M Jul 17 17:10 Developing_Backbonedotjs_Applications.epub -rw-r----- 1 thattommyhall thattommyhall 5.2M Jul 17 17:10 Developing_Backbonedotjs_Applications.mobi -rw-r----- 1 thattommyhall thattommyhall 7.7M Jul 17 17:10 Developing_Backbonedotjs_Applications.pdf ./ENC: total 19M -rw-r----- 1 thattommyhall thattommyhall 5.5M Jul 17 17:10 3R4b6qteJLZmTzMGit2cWajhzkVG,rLw6xry2PujL4LSbtg3EgftaMWfhQk4fM5mc-C -rw-r----- 1 thattommyhall thattommyhall 7.7M Jul 17 17:10 EnMiuriWbkgXYz7F9GsAzRlCBSpmHub7kvObd8fyFswVkhlUi-FzHaT7twrIHXsEOy5 -rw-r----- 1 thattommyhall thattommyhall 5.2M Jul 17 17:10 Z8izkCiMcMqBf,9a3a2smF3C6RAHQmicTi8UIgl7eCZfcRnOUVtwDq4kxrLM61Yc-n6   Getting md5 sums for the files. ~/ENCFS/ENC$ md5sum *
027a7ff02f785dbe211a91e9f218bea7  3R4b6qteJLZmTzMGit2cWajhzkVG,rLw6xry2PujL4LSbtg3EgftaMWfhQk4fM5mc-C
bd2635929cfab11349ba5dde73e0b303  EnMiuriWbkgXYz7F9GsAzRlCBSpmHub7kvObd8fyFswVkhlUi-FzHaT7twrIHXsEOy5
08786c915984a10532a2485f0e21ee4e  Z8izkCiMcMqBf,9a3a2smF3C6RAHQmicTi8UIgl7eCZfcRnOUVtwDq4kxrLM61Yc-n6


If you edit one file, just one changes

~/ENCFS/ENC$md5sum * 73a2f5ec8389aba5806b5b3eb267ed72 3R4b6qteJLZmTzMGit2cWajhzkVG,rLw6xry2PujL4LSbtg3EgftaMWfhQk4fM5mc-C bd2635929cfab11349ba5dde73e0b303 EnMiuriWbkgXYz7F9GsAzRlCBSpmHub7kvObd8fyFswVkhlUi-FzHaT7twrIHXsEOy5 08786c915984a10532a2485f0e21ee4e Z8izkCiMcMqBf,9a3a2smF3C6RAHQmicTi8UIgl7eCZfcRnOUVtwDq4kxrLM61Yc-n6  If you create a directory structure, it is recreated in the encrypted folder with an obfuscated name ~/ENCFS/CLEAR$ mkdir -p one/two/three
~/ENCFS/CLEAR$mv Developing_Backbonedotjs_Applications.epub one/two/three/ ~/ENCFS/CLEAR$ cd ..
~/ENCFS$tree ENC/ ENC/ ├── EnMiuriWbkgXYz7F9GsAzRlCBSpmHub7kvObd8fyFswVkhlUi-FzHaT7twrIHXsEOy5 ├── ViMb6X99i1TkJiAoyT-FHKTE │ └── 7EVvTVP53WUQF0SiJFhG-jzO │ └── azretaLwQ40MO38NDhqOlNXJ │ └── mpIK4ZSAq0gRwTeQWOaJRE,rbxSAAW0V4Cp8VdGXFj37q6IRkHVqdwPeSU0sq0JGQi4 └── Z8izkCiMcMqBf,9a3a2smF3C6RAHQmicTi8UIgl7eCZfcRnOUVtwDq4kxrLM61Yc-n6  This fact means that it will play nice with file based backups, except if they do a diff style copy as the whole file is likely to look changed with each update. To remount, simply run the same command as before and enter your password $ encfs ~/ENCFS/ENC/ ~/ENCFS/CLEAR/


You can put the encrypted folder in your Dropbox, copy it to S3, rsync/scp it to a VPS somewhere and they will never be able to see your data, neither will the NSA.

## OSX

Of course, if you use OSX - it’s easier. According to Emmanuel Bernard you just have to remember that the encfs in homebrew uses fuse4x which is now deprecated in favour of OSXfuse and simply do

\$ brew install https://raw.github.com/jollyjinx/encfs.macosx/master/encfsmacosxfuse.rb
`

from a random github repo and wait while it compiles.

## Windows

I did not know that fuse has been ported to windows as dokan and has encfs available here, should be easy enough to set up.

## Android

Cryptonite looks good, but will not be as easy to set up as the others