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Re: Encrypt existing Time Machine backups?

Subject Re: Encrypt existing Time Machine backups?
Newsgroups comp.sys.mac.apps, comp.sys.mac.hardware.storage, comp.sys.mac.system
References (9 earlier) <mvesrs$7l4$1@dont-email.me> <6Kmdne4aRMfDM4bLnZ2dnUU7-d-dnZ2d@giganews.com> <RcKdnd_Z4twJJobLnZ2dnUU7-VGdnZ2d@giganews.com> <mvh4a3$i0g$1@dont-email.me> <d82n6uF6lacU1@mid.individual.net>
From Alan Browne <alan.browne@freelunchvideotron.ca>
Date 2015-10-12 17:39 -0400
Message-ID <mdadnRPob60FtYHLnZ2dnUU7-RmdnZ2d@giganews.com> (permalink)

Cross-posted to 3 groups.

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On 2015-10-12 17:32, Jolly Roger wrote:
> On 2015-10-12, John Somerset <somerset@nospam.com> wrote:
>> On 10/12/15 9:54 AM, Alan Browne wrote:
>>> On 2015-10-12 08:58, Alan Browne wrote:
>>>> On 2015-10-11 19:56, John Somerset wrote:
>>
>>>>> Oh, I thought that encrypting a disk, as with Filevault, meant the whole
>>>>> disk had to be unencrypted to work. If memory can grab only what it
>>>>> needs, that sounds much faster.
>>>
>>> Doh.  I really misread what you wrote when I replied with the stuff below.
>>>
>>> But yes, the drive remains encrypted and the data from the FileVaulted
>>> drive is decrypted in memory on your Mac as needed, file by file (or
>>> probably block by block)
>>>
>> Am I correct that if I encrypted a folder, I couldn't get at any file
>> without decrypting the whole folder?
>
> It's my understanding that with FileVault 2 full disk encryption, it is
> not folders and files, but individual *blocks* of the volume. FileVault
> encrypted disks are CoreStorage logical volume groups that work with the
> LVM built into OS X. Encryption and decryption work at the logical
> volume level rather than the file system level.

I took that question to be for a given folder encrypted into a DMG. 
Otherwise agree with what you wrote.

>
>> Correct or not, that was my concept of it.  That's why I assumed
>> Filevault needed to decrypt a disk to get access to any of it.  It
>> sounded time-consuming, with disaster always lurking.
>
> FileVault 2 in particular is extremely simple, reliable, and safe, and
> is used by millions of Apple customers daily.

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Thread

Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 12:37 -0500
  Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-11 17:45 +0000
    Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-11 13:57 -0400
      Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 13:05 -0500
      Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-11 18:07 +0000
        Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 13:11 -0500
          Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-11 18:17 +0000
            Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 14:07 -0500
              Re: Encrypt existing Time Machine backups? nmassello@yahoo.com (Neill Massello) - 2015-10-11 15:16 -0600
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-11 17:37 -0400
                Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 17:48 -0500
                Re: Encrypt existing Time Machine backups? nospam <nospam@nospam.invalid> - 2015-10-11 18:53 -0400
                Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 17:58 -0500
                Re: Encrypt existing Time Machine backups? nmassello@yahoo.com (Neill Massello) - 2015-10-12 00:38 -0600
                Re: Encrypt existing Time Machine backups? nospam <nospam@nospam.invalid> - 2015-10-12 12:01 -0400
                Re: Encrypt existing Time Machine backups? nmassello@yahoo.com (Neill Massello) - 2015-10-12 00:38 -0600
                Re: Encrypt existing Time Machine backups? nospam <nospam@nospam.invalid> - 2015-10-12 12:01 -0400
                Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 17:52 -0500
                Re: Encrypt existing Time Machine backups? John Somerset <somerset@nospam.com> - 2015-10-11 19:56 -0400
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 08:58 -0400
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 09:54 -0400
                Re: Encrypt existing Time Machine backups? John Somerset <somerset@nospam.com> - 2015-10-12 16:15 -0400
                Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-12 21:32 +0000
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 17:39 -0400
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 17:38 -0400
                Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-12 22:27 +0000
                Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-12 02:31 +0000
                Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-13 01:58 -0500
                Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-13 07:09 +0000
                Re: Encrypt existing Time Machine backups? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2015-10-12 03:04 +0000

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