On Fri, 17 Apr 2015 14:25:36 -0700
David Christensen wrote:
> On 04/17/2015 12:41 PM, Reco wrote:
...
> > [Perl's Math::Random::ISAAC::XS] doesn't seem to use kernel-based entropy
> > at all. Thank
> > you for pointing me out at it, now I know it so I avoid it.
>
> ISAAC is very useful when I
On 04/17/2015 12:41 PM, Reco wrote:
And 'shred' uses /dev/urandom in turn:
$ strace -e trace=file shred -s 100M - > /dev/null
…
open("/usr/lib/locale/locale-archive", O_RDONLY) = 3
open("/dev/urandom", O_RDONLY) = 3
Although, according to strace, 'shred' cheats and only reads 2k bytes
fr
Hi.
On Fri, 17 Apr 2015 12:08:31 -0700
David Christensen wrote:
> 1. I use 'shred' when I want to fill a disk or partition with random
> numbers. It is ~1.7 orders of magnitude faster than /etc/urandom.
And 'shred' uses /dev/urandom in turn:
$ strace -e trace=file shred -s 100M - > /dev/nu
I don't think it's quite this simple:
On 04/16/2015 06:56 PM, Celejar wrote:
> I don't think it's quite this simple:
> 1) OpenSSl thinks /dev/urandom is good enough for crypto:
> https://www.openssl.org/support/faq.html#USER1
> 2) Perl's Math::Random::Secure also thinks it's generally good enough
On Wed, 15 Apr 2015 08:30:04 -0700
David Christensen wrote:
...
> /dev/random is for cryptographically secure random numbers, such as for
> cryptographic keys. It requires a source of entropy to operate, and
> will block until entropy is available. Thus, on most desktop computers,
> it is o
On 04/16/2015 12:31 PM, ken wrote:
... remembering that partitioning also detects and marks bad blocks,
I was then wondering if this was done also by the writing of LUKS container
alone.
It is my understanding that the drive firmware is where "bad blocks" are
detected and marked. I expect th
On Thu, Apr 16, 2015, at 16:31, ken wrote:
> After thinking about it, and remembering that partitioning also detects
> and marks bad blocks, I was then wondering if this was done also by the
> writing of LUKS container alone. Anyone know?
The typical install will have the LUKS container (actua
On 04/15/2015 12:33 PM, David Christensen wrote:
On 04/15/2015 08:01 AM, ken wrote:
What options or features does one get by putting the LUKS container in a
partition rather than putting it on a raw drive?
I am not aware of any technical advantages or disadvantages of LUKS on a
raw drive vs. L
On Wednesday 15 April 2015 18:33:56, David Christensen wrote :
> On 04/15/2015 08:01 AM, ken wrote:
> > What options or features does one get by putting the LUKS container in a
> > partition rather than putting it on a raw drive?
>
> I am not aware of any technical advantages or disadvantages of L
On 04/15/2015 08:01 AM, ken wrote:
What options or features does one get by putting the LUKS container in a
partition rather than putting it on a raw drive?
I am not aware of any technical advantages or disadvantages of LUKS on a
raw drive vs. LUKS on a partition. For me, it's more a matter o
You can try this guide:
http://kaivanov.blogspot.com/2015/03/block-device-encryption-with-cryptsetup.html
On Wed, Apr 15, 2015 at 4:53 AM, Stephen R Guglielmo
wrote:
> Hi list,
>
> I have a USB external HDD that I would like to encrypt with a
> passphrase. After looking into filesystems, I deci
On 04/15/2015 05:17 AM, Frédéric Marchal wrote:
I understand that filling the encrypted partition (/dev/mapper/backup2) with
zeros is equivalent to filling the unencrypted partition (/dev/sdb1) with
random data as explained by other procedures.
I've found 'shred' to be the fastest way to fill a
On 04/15/2015 10:50 AM, David Christensen wrote:
On 04/15/2015 05:04 AM, Petter Adsen wrote:
http://www.cyberciti.biz/hardware/howto-linux-hard-disk-encryption-with-luks-cryptsetup-command/
That article shows how to create a LUKS container on the raw drive. I
prefer creating a partition tabl
On Wed, 15 Apr 2015 07:50:50 -0700
David Christensen wrote:
> On 04/15/2015 05:04 AM, Petter Adsen wrote:
> > http://www.cyberciti.biz/hardware/howto-linux-hard-disk-encryption-with-luks-cryptsetup-command/
>
> That article shows how to create a LUKS container on the raw drive.
> I prefer creati
On 04/15/2015 05:04 AM, Petter Adsen wrote:
http://www.cyberciti.biz/hardware/howto-linux-hard-disk-encryption-with-luks-cryptsetup-command/
That article shows how to create a LUKS container on the raw drive. I
prefer creating a partition table, creating one large primary partition,
and putt
On Wednesday 15 April 2015 13:53:20, Stephen R Guglielmo wrote :
> Hi list,
>
> I have a USB external HDD that I would like to encrypt with a
> passphrase. After looking into filesystems, I decided to go with Ext4.
> What's the recommended way of encrypting a drive? Do I partition it
> first, then
On Wed, 15 Apr 2015 07:53:20 -0400
Stephen R Guglielmo wrote:
> Hi list,
>
> I have a USB external HDD that I would like to encrypt with a
> passphrase. After looking into filesystems, I decided to go with Ext4.
> What's the recommended way of encrypting a drive? Do I partition it
> first, then
HI Jon,
I've been using truecrypt (available for windows, mac and linux) for a
while without problems. It works as a file inside a partiiton on any
available system (lvm or not) and can be installed even using fat or
other basic filesystems.
The solutions uses a graphical interface, and can be sc
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