Truecrypt II / alterative self contained secure file

Does anyone know whether Truecrypt  (or any other encryption software) can be mounted remotely on an online backup / cloud storage place, so that I can simply click on the remote file, open it after entering my password, and then drag and drop files to it either via Windows Explorer if on my PC or via the Mac Finder if on my iMAC?

Also, I once had a free encryption tool I think came with my USB 16gb Bytestor drive, but no longer have it, which allowed me to do the above i.e. double click the self contained file, enter the password which then opens the folder for viewing.  I dont think it was Truecrypt as I didnt need to mount any file, it all just opened automatically after entering the password.  Any such software exist?
abdb469Asked:
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Rich RumbleSecurity SamuraiCommented:
You can do that with a Zip or 7Zip file, zip is more universal. TC does not allow you to simply double-click a file that contains a TC file and open up, this goes against it's most basic idea of plausible deniability. The 7zip program allows you to use 256-bit AES crypto for zip or 7z archive types, there is an install for mac/apple.
-rich
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btanExec ConsultantCommented:
Can check out below
 http://www.boxcryptor.com/ - however it state does not support window.file sharing. Encrypted data is stored in an arbitrary directory of your choice, e.g. one that is synced to the cloud like your Dropbox folder. When reading files, BoxCryptor decrypts them in real-time so that they are accessible as any other unencrypted file....

There is another called secretsync @ http://getsecretsync.com/ss/ but this maybe different scheme which uou may want to consider, secure backup access.

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abdb469Author Commented:
breadtan,
Just so that I'm clear, what do you mean by Windows file sharing?  Do you mean for example the ability to transfer files from my windows pc to my mac via my network?

So when using boxcryptor in a cloud enironment like Dropbox (I have to try it myself when I get a moment), are you saying I can open the equivalent of a container whilst its on the cloud server and add files incrementally to it and then close it again on the server, therefore all in all I dont need to keep sending across an encrypted large container file just because I added a Word document to it?  If that is the case, then it sounds good, although looks like they are charging for any user who need a large file over 2gb.

rich,
I'm not look for a zip file type solution.  I havent looked at 7zip yet.  How does that work?


Does anyone know if my USB flash drive is encrypted in NTFS format, it wont work on a mac right?  It has to be FAT 16 or 32?
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btanExec ConsultantCommented:
This article review boxcryptor. e.g it encrypt local folder that you syncwith dropbox and files are protected transparent when you drop into the local folder specified in boxcryptor setup of target folder. I saw in its faq not supporting file sharing for network drive which is the simple file sharing with other user
 http://www.groovypost.com/howto/review/boxcryptor-truecrypt-alternative-dropbox/
 https://boxcryptorsupport.uservoice.com/knowledgebase/articles/35114-can-i-share-a-folder-within-my-boxcryptor-drive-ov

but it does say the source folder can be on network drive in below link, probably not access by other user but restrict to owner. Better with test
 https://boxcryptorsupport.uservoice.com/knowledgebase/articles/35115-are-there-any-known-issues-when-the-source-folder-
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Rich RumbleSecurity SamuraiCommented:
Fat32 if you want anything over a few Gig's. 7zip is an archive solution, it doesn't have to compress data, but it's typically a plus if you do. 7zip is a popular LZMA compession algorithm used in many file formats such as Linux RPM files. 7zip understands and can decompress many file formats, like iso, tar,gz,zip,cab, exe and even dll's... it can only create a limited amount of archives like zip, 7z, bz, bz2, tar/gz. I made the suggestion of using a zip program for three reasons, one is compression is often a good idea for large amounts of data and 7zip is extremely good at compression and is multi-threaded. Second, when you try to extract an archive that is password protected you are prompted for the password. Third, the encryption used by 7zip, especially the 7z archives, the AES-256 is very strong crypto.
-rich
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Rich RumbleSecurity SamuraiCommented:
Also using 7z allows you to still store plain-text on your USB drive or in the cloud, so you can have the executable stored on your USB so it can be used on windows/mac/linux without you having to install 7z on everything you want to access the files from. You can store the 7z programs in the cloud as well.
-rich
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btanExec ConsultantCommented:
You may want to check out this, rather old article saying fat32 is alright but ntfs is read only, not write. There is a way out highlighted in the link.
 http://techqa.wordpress.com/2008/07/07/can-mac-read-and-write-to-ntfs-drives/

By the way boxcrypt has a portable version esp useful if you cannot install the software amd needed to still decrypt the data. Fyi
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abdb469Author Commented:
I'm trying to use truecrypt on a livedrive account where I have mapped a virtual drive to my PC, but it wont allow me to create a container, it says invalid function.  Is it possible to create a large container on a virtually mapped drive?
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Rich RumbleSecurity SamuraiCommented:
A TC container is just a file, and when mounted should give you yet another drive. I don't think you'd have a problem creating one on an already mounted drive, and or copying on to that mounted drive. If it's really large maybe you make it local, and copy it to the livedrive. I've never tried it to such a remote location before.
-rich
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btanExec ConsultantCommented:
Truecrypt does not encrypted already network mapped drive but it can create a vitrual volume and mount as another drive. Agree with what richrumble mentioned. Windows efs can do network mapped drive but it is send in clear when datat send across network to file server..truecrypt is not file base encryption. But it can do partition enxryption locally, not mapped drive volume that I know of though...cant find specific in tc faq and doc too...
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abdb469Author Commented:
I'm not trying to map or encrypt a virtual drive, simply trying to create a volume container on the mapped drive.  I think I'm
Making a basic mistake somewhere.  Seems to only work if I create a file in a sub folder of a virtual cloud drive eg L:\test\testfile but not L:\testfile
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Rich RumbleSecurity SamuraiCommented:
TC container is encrypted, at all times. You can copy it anywhere you want (as far as I know) and when you want to open it, you will enter a password or use a keyfile, then once that succeeds, you will get ANOTHER drive mounted. The file isn't decrypted on disk, so losing connection or power on your computer will not expose the data inside the TC container. If your having an issue creating l:\testfile then maybe you can make c:\testfile using TC and move/copy to l:\testfile instead? Then when you use TC to browse to l:\testfile, enter the password, you should have a new drive (m: for example)
-rich
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abdb469Author Commented:
I agree with everything in your last comment but my point is I cannot create the TC on my local c drive and move it because of lack of space for the size of container I want to create.

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abdb469Author Commented:
any further update?
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Rich RumbleSecurity SamuraiCommented:
I don't know why it works in a subfolder and not the root folder other than it sounds like a permissions issue. But TC should have the same permission as the account that is running it.
-rich
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abdb469Author Commented:
will try again this weekend.
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