How can I encrypt and password protect an external hard drive for crossplatform?

I would like to encrypt and password protect 2 external hard drives, however it must be accessible for windows users, Mac OS uers and Linux users.
100questionsAsked:
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Owen RubinConsultantCommented:
One of the few cross platform encryption for drives was "TrueCrypt", but it was found to have security issues, maybe.

Have a look at this website for info on what you ask:
http://www.howtogeek.com/195124/how-to-easily-encrypt-files-on-windows-linux-and-mac-os-x/
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100questionsAuthor Commented:
Thank you, however none of the solutions listed on that webpage will encrypt an external hard drive which can be used by Windows, MAC and Linux.    That is what I am looking for.   I am not willing to risk using Truecrypt.
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Owen RubinConsultantCommented:
Yea, sorry. It appears that Truecrypt is the only solution right now.

Question: Does the same data need to be available to all three OSs? If not, you could partition the drive and use encryption for each partition for each OS.

The killer here is typically the encryption is done at the driver level, and I am not sure of any drivers that work on all three operating systems.

Sorry I do not have a better answer.  

Have you looked at GNU Privacy Guard? I do not know if it works as you needed, but they have solutions for all operating systems. Just do not know if they work on a single drive at the same time.  https://www.gnupg.org/

Good luck. If you find a solution, please post it back here.
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100questionsAuthor Commented:
Thanks. Yes, the same data needs to be accessible by all OSs.
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Owen RubinConsultantCommented:
FYI McKnife, I could not follow that link. It came up bad.
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McKnifeCommented:
Sorry, it's http://www.withopf.com/tools/securstick/ and I meant to post the translation which is just ontop of that page.
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Carlos IjalbaSenior SysadminCommented:
Just one thing: Truecrypt does not really have security issues yet, it's just that after the WinXP end of support, the developers have stopped all development and bug fixing, the project is now closed.

Which means that if any security flaws or bugs appear, they won't be fixed by anybody, and so they recommend to use BitLocker. But the good thing about TrueCrypt, was precisely it's portability, it0s quite a shame, I still use it, but I don't know for how much longer.
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McKnifeCommented:
> But the good thing about TrueCrypt, was precisely it's portability
Try it. You will need admin rights to use it in portable mode on other windows installations. The software I linked does not.
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100questionsAuthor Commented:
Unsure if this works.  Unfortunately I am restricted as to asking more questions unless I close abandoned questions.
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McKnifeCommented:
100questions, why didn't you use mine? It is portable for Linux, windows and MAC. It does not require admin rights (whereas truecrypt portable does!) and it is free, too. I don't quite understand it.
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McKnifeCommented:
http:#a40390798 is a solution.
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Owen RubinConsultantCommented:
I suggest my original comment as a partial solution ( http:#a40389380), with Carlos's answer as a supporting answer ( http:#a40391003), then McKnife's answer as an alternate solution ( http:#a40390798). I'm sorry, If my links are bad, your mobile platform editing is so bad on an iPad.)

As for McKnife's suggested answer, it sure would be nice if he could recognize that his was not the ONLY Solution that answered the question.
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McKnifeCommented:
Hi orrubin!
I didn't mean to say mine was the only solution. But I find it hard to suggest your answers for I have never used them myself - I didn't use truecrypt on a Mac at all, nor did I use it very much on Linux - I hope you understand.
Since truecrypt is not truly portable, as I pointed out before (admin rights needed, at least on windows!), I still suggest to use mine :)
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Owen RubinConsultantCommented:
Ok. Understood. I have never used yours either, but I did go check it out (how I detected the bad link originally) thanks for clarifying.

And yes, I assume he had admin rights since he was attaching drives.
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