A
a a
Guest
The idiot whit3rd <whit3rd@gmail.com> persisting in being an Off-topic troll...
--
whit3rd <whit3rd@gmail.com> wrote:
--
whit3rd <whit3rd@gmail.com> wrote:
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Before a person gives his laptop away and wants to erase all info/data...
J
Jan Panteltje
Guest
On a sunny day (Mon, 2 Oct 2023 03:16:05 -0700) it happened Don Y
<blockedofcourse@foo.invalid> wrote in <ufe598$2t0bb$3@dont-email.me>:
Depends, I use sequential sector based records for for example location and altitude in my drone SDcard.
Faster simpler better.
https://panteltje.nl/panteltje/quadcopter/index.html
A file system is not always needed, especially if you only have a
lot of the same data data records sequential in time
And if I wanted to encrypt something and store it I am free to put in anywhere in FLASH
But OK for Linux and widblows users ....
<blockedofcourse@foo.invalid> wrote in <ufe598$2t0bb$3@dont-email.me>:
On 10/2/2023 1:27 AM, Martin Brown wrote:
That is about what the standard zappers do except that you have to do it two or
three times over to weaken residual signals. It depends what technical level of
adversary you expect to be going up against.
Writing a file implies you have a file SYSTEM.
Depends, I use sequential sector based records for for example location and altitude in my drone SDcard.
Faster simpler better.
https://panteltje.nl/panteltje/quadcopter/index.html
A file system has metadata that is typically not stored in the file
itself. So, a record of the (deleted) files still exists.
A file system is not always needed, especially if you only have a
lot of the same data data records sequential in time
And if I wanted to encrypt something and store it I am free to put in anywhere in FLASH
But OK for Linux and widblows users ....
A
a a
Guest
The arsehole Jan Panteltje <alien@comet.invalid> persisting in being an Off-topic troll...
--
Jan Panteltje <alien@comet.invalid> wrote:
--
Jan Panteltje <alien@comet.invalid> wrote:
Path: not-for-mail
From: Jan Panteltje <alien@comet.invalid
Newsgroups: sci.electronics.design
Subject: Re: Before a person gives his laptop away and wants to erase all
info/data
Date: Tue, 03 Oct 2023 05:42:59 GMT
Message-ID: <ufg9l3$t9if$1@solani.org
References: <b8fd4d7f-ee53-4f2d-a410-668c94ec5a8en@googlegroups.com> <58394583-8e8d-4452-b8a3-c5bac1dba4bcn@googlegroups.com> <u30jhit90if6ja0e96kevm1519qncrmv36@4ax.com> <ufduub$2rrc8$4@dont-email.me> <ufe598$2t0bb$3@dont-email.me
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J
Jasen Betts
Guest
On 2023-10-01, whit3rd <whit3rd@gmail.com> wrote:
These drives will show a time of 2 minutes for SATA secure erase
\"2min for SECURITY ERASE UNIT\"
This is for most server drives and many desktop drives, also some USB hard
drives.
(in practice it takes closer to 2 seconds, but it\'s an interger field (byte?) and
the measuring unit is 2 minutes)
--
Jasen.
ðºð¦ Слава УкÑаÑнÑ
On Friday, September 29, 2023 at 4:27:27â¯PM UTC-7, gggg gggg wrote:
Is there a simple command that will wipe out all info/data?
Yes, but it\'ll cost ya. There are disk drives that secure the data by
encrypting on-the-fly all the time, and decrypt on-the-fly so it all
happens transparently. They\'re \'enterprise\' models, sometimes
with odd (SAS, fibre channel, whatever-it-is-this-decade) connection
requirements.
Those drives store an internal key that can be overwritten when you want
to lose the data. Even \'bad blocks\' are encrypted, so the loss of the
key makes every bit of the data on the drive into... semi-random bits.
These drives will show a time of 2 minutes for SATA secure erase
\"2min for SECURITY ERASE UNIT\"
This is for most server drives and many desktop drives, also some USB hard
drives.
(in practice it takes closer to 2 seconds, but it\'s an interger field (byte?) and
the measuring unit is 2 minutes)
--
Jasen.
ðºð¦ Слава УкÑаÑнÑ
D
Don Y
Guest
On 9/30/2023 6:13 PM, whit3rd wrote:
I don\'t know of exploits to recover the data after the keys are \"wiped\"
but suspect such an exploit DOES exist. And, given that the \"erasure\"
is only accomplished at the gateway to the device (i.e., all of the encrypted
data STILL resides on the device), wouldn\'t count on that as a viable way to
protect sensitive data:
<https://kb.cert.org/vuls/id/395981/>
<https://www.dell.com/support/kbdoc/en-us/000130689/self-encrypting-drives-vulnerabilities-cve-2018-12037-and-cve-2018-12038-mitigation-steps-for-dell-encryption-products>
<https://arstechnica.com/gadgets/2021/08/how-to-go-from-stolen-pc-to-network-intrusion-in-30-minutes/>
(Note that software-based approaches have already been shown to be vulnerable)
Think REALLY hard before letting media that contains/contained \"important\"
data leave your physical control. Encryption in communications is a
different beast, entirely; the data likely has temporal sensitivity
AND the keys can be changed, dynamically. Not so for large blocks of
largely static data!
On Friday, September 29, 2023 at 4:27:27â¯PM UTC-7, gggg gggg wrote:
Is there a simple command that will wipe out all info/data?
Yes, but it\'ll cost ya. There are disk drives that secure the data by
encrypting on-the-fly all the time, and decrypt on-the-fly so it all
happens transparently. They\'re \'enterprise\' models, sometimes
with odd (SAS, fibre channel, whatever-it-is-this-decade) connection
requirements.
Those drives store an internal key that can be overwritten when you want
to lose the data. Even \'bad blocks\' are encrypted, so the loss of the
key makes every bit of the data on the drive into... semi-random bits.
I don\'t know of exploits to recover the data after the keys are \"wiped\"
but suspect such an exploit DOES exist. And, given that the \"erasure\"
is only accomplished at the gateway to the device (i.e., all of the encrypted
data STILL resides on the device), wouldn\'t count on that as a viable way to
protect sensitive data:
<https://kb.cert.org/vuls/id/395981/>
<https://www.dell.com/support/kbdoc/en-us/000130689/self-encrypting-drives-vulnerabilities-cve-2018-12037-and-cve-2018-12038-mitigation-steps-for-dell-encryption-products>
<https://arstechnica.com/gadgets/2021/08/how-to-go-from-stolen-pc-to-network-intrusion-in-30-minutes/>
(Note that software-based approaches have already been shown to be vulnerable)
Think REALLY hard before letting media that contains/contained \"important\"
data leave your physical control. Encryption in communications is a
different beast, entirely; the data likely has temporal sensitivity
AND the keys can be changed, dynamically. Not so for large blocks of
largely static data!
A
a a
Guest
The arsehole Don Y <blockedofcourse@foo.invalid> persisting in being an Off-topic troll...
--
Don Y <blockedofcourse@foo.invalid> wrote:
--
Don Y <blockedofcourse@foo.invalid> wrote:
Path: not-for-mail
From: Don Y <blockedofcourse@foo.invalid
Newsgroups: sci.electronics.design
Subject: Re: Before a person gives his laptop away and wants to erase all
info/data
Date: Fri, 6 Oct 2023 02:32:39 -0700
Organization: A noiseless patient Spider
Lines: 32
Message-ID: <ufok80$1fkp6$1@dont-email.me
References: <b8fd4d7f-ee53-4f2d-a410-668c94ec5a8en@googlegroups.com
58394583-8e8d-4452-b8a3-c5bac1dba4bcn@googlegroups.com
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A
a a
Guest
The idiot Jasen Betts <usenet@revmaps.no-ip.org> persisting in being an Off-topic troll...
--
Jasen Betts <usenet@revmaps.no-ip.org> wrote:
--
Jasen Betts <usenet@revmaps.no-ip.org> wrote:
Path: not-for-mail
From: Jasen Betts <usenet@revmaps.no-ip.org
Newsgroups: sci.electronics.design
Subject: Re: Before a person gives his laptop away and wants to erase all
info/data
Organization: JJ\'s own news server
Message-ID: <ufo2mq$prn$2@gonzo.revmaps.no-ip.org
References: <b8fd4d7f-ee53-4f2d-a410-668c94ec5a8en@googlegroups.com
58394583-8e8d-4452-b8a3-c5bac1dba4bcn@googlegroups.com
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A
a a
Guest
On Friday, 6 October 2023 at 18:04:50 UTC+2, a a wrote:
don\'t be silly
Laptops by Dell come with OS installed in the BIOS,
supported by LoJack remote access functionality
so you can do nothing
to wipe out or erase the BIOS
The arsehole Don Y <blocked...@foo.invalid> persisting in being an Off-topic troll...
--
Don Y <blocked...@foo.invalid> wrote:
Path: not-for-mail
From: Don Y <blocked...@foo.invalid
Newsgroups: sci.electronics.design
Subject: Re: Before a person gives his laptop away and wants to erase all
info/data
Date: Fri, 6 Oct 2023 02:32:39 -0700
Organization: A noiseless patient Spider
Lines: 32
Message-ID: <ufok80$1fkp6$1...@dont-email.me
References: <b8fd4d7f-ee53-4f2d...@googlegroups.com
58394583-8e8d-4452...@googlegroups.com
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don\'t be silly
Laptops by Dell come with OS installed in the BIOS,
supported by LoJack remote access functionality
so you can do nothing
to wipe out or erase the BIOS
A
a a
Guest
>
Yet one more #veryStupidByLowIQaa post.
Yet one more #veryStupidByLowIQaa post.