Discussion: Please suggest backup/encryption strategy

[garnet]

Hi all,

I have a linux box with a folder of important documents. Some of these documents are changed at irregular intervals. What I am after is a routine for backing up and encrypting them.

In general here's what I want.
A script runs on the folder every day and only backups the new/modified files. By backup I mean puts them in an archive file and encrypts them. I need something with industry strength encryption.
Then it uploads (ftp, webdav other) the encrypted archive to a cloud storage (I need 2 of these). We are talking small files here (< 10mb)

Any ideas on

what to use to archive only modified/new files (rsynch, tar, gzip)?
what to use to encrypt the archive?
What encryption to use?
where to upload?
some detail on the process

will be appreciated.

[jdk]

Check out SpiderOak.

It is an encrypted cloud backup service with client software that runs on multiple platforms. I pay for 100GB, but you can get 2 GB for free. We run five operating systems in our home and SpiderOak supports four of them.

You can set the client to detect changes to a directory and upload when necessary. No idea about recovering previous versions of a file like ZFS or Time Machine since I have never used that function.

[Tedy1939]

We are talking small files here (< 10mb)

Any ideas on

What encryption to use?
where to upload?

Hi.
The "industry standard" as far as encryption goes should still be AES. As your files are small, and do not have to be rewritten too much, I suggest you use a two layer encryption.
AES-Serpent should be a good choice (in that order). It is slower, but MUCH safer.

Do you see any possibility to save the data locally? On a USB or external HDD? I'd not advise uploading sensitive data to anywhere.

[garnet]

We are talking small files here (< 10mb)

Any ideas on

What encryption to use?
where to upload?

Hi.
The "industry standard" as far as encryption goes should still be AES. As your files are small, and do not have to be rewritten too much, I suggest you use a two layer encryption.
AES-Serpent should be a good choice (in that order). It is slower, but MUCH safer.

Do you see any possibility to save the data locally? On a USB or external HDD? I'd not advise uploading sensitive data to anywhere.

thanks for that. I can save the data locally, yes, and I do but since it is important data, cloud storage is also needed. It is not so much of sensitive data, but important one. So uploading it on some cloud (actually on 2 clouds) is desired. Any suggestions on such clouds - to be able to upload data from a linux OS. I need at least 3 to be able to select 2.
What is your concern if the data is encrypted?