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by marcosdumay 4773 days ago
It aledgely encripts all your data at the local machine, before sending it to the server.

Now, of course, if you are truly paranoid, you'll want to review their code first. I don't get why I can't simply mount a volume with encription and write there. Using code that is already on my machine (on the kernel, nonetheless) would make it a much simpler decision.
3 comments
cperciva 4773 days ago
I don't get why I can't simply mount a volume with encription and write there.

You can (and you could even use tarsnap to back up the encrypted filesystem image if you want), but writing your data to an encrypted filesystem tends to expand the amount of data changing -- in the extreme case, if you create a copy of a file you'll write that many blocks of new encrypted data which needs to be backed up, whereas tarsnap would just say "hey, I recognize all these blocks, it's those ones I backed up earlier" -- so Tarsnap's encrypted backups of a filesystem tend to be many times more efficient than backups of an encrypted filesystem.

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profquail 4773 days ago
Did you just assume the source code wasn't available? It's not linked from the front page of the site, but if you go to the 'Download' page, it's right there for your review:

https://www.tarsnap.com/download.html

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objectivefs 4773 days ago
I don't get why I can't simply mount a volume with encription and write there.

If you want to mount an encrypted filesystem stored on S3, you might want to try ObjectiveFS. https://objectivefs.com

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