Re: wiping files
2011/2/9 shimi linux...@shimi.net On Wed, Feb 9, 2011 at 9:50 PM, Uri Even-Chen u...@speedy.net wrote: Thank you. Wiping files is part of pretty good privacy (PGP) - if you want privacy you need to wipe your deleted files. I would trust having them all at encrypted-state at all times (and avoiding using swap) to be a must better approach. I couldn't care less if someone takes my random data which he has no key for, and read it for fun... I suspect this is not too different than reading /dev/random. -- Shimi That's the concept for ZFS secure deletion. As per http://www.c0t0d0s0.org/archives/5793-Secure-Deletion-with-ZFS.html : snip Use encryption and when you want to delete the data throw away the matching key. snip And this is exactly the way, secure deletion will be done with ZFS. It´s done by encryption. You will be able to define an encryption key by dataset and when you want to delete a dataset securely just throw a way the key. Remember that creating a dataset is as easy as creating a directory in ZFS. ZFS Crypto will be the solution for the secure delete challenge. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: wiping files
On Tue, Feb 15, 2011 at 21:30, Michael Tewner tew...@gmail.com wrote: 2011/2/9 shimi linux...@shimi.net On Wed, Feb 9, 2011 at 9:50 PM, Uri Even-Chen u...@speedy.net wrote: Thank you. Wiping files is part of pretty good privacy (PGP) - if you want privacy you need to wipe your deleted files. I would trust having them all at encrypted-state at all times (and avoiding using swap) to be a must better approach. I couldn't care less if someone takes my random data which he has no key for, and read it for fun... I suspect this is not too different than reading /dev/random. -- Shimi That's the concept for ZFS secure deletion. As per http://www.c0t0d0s0.org/archives/5793-Secure-Deletion-with-ZFS.html : snip Use encryption and when you want to delete the data throw away the matching key. snip And this is exactly the way, secure deletion will be done with ZFS. It´s done by encryption. You will be able to define an encryption key by dataset and when you want to delete a dataset securely just throw a way the key. Remember that creating a dataset is as easy as creating a directory in ZFS. ZFS Crypto will be the solution for the secure delete challenge. Secure deletion is different than encryption! Remember that no encryption is 100% safe. With encryption it's still possible to read your data, if somebody finds your key; it's possible that in the future they will be able to decrypt those encryptions; and you might even give the key. With secure deletion it's not possible. Once you delete files they are gone! If somebody is able to read them then it's not secure deletion. And if you have a file you want to encrypt, you should securely delete the original file after encryption, otherwise you didn't do anything. If you just encrypt the file and delete the original file (not securely), then it's still on your hard disk! Secure deletion is very important. Uri Even-Chen Mobile Phone: +972-50-9007559 E-mail: u...@speedy.net Website: http://www.speedy.net/ ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: wiping files
On Wed, Feb 9, 2011 at 11:24 AM, Uri Even-Chen u...@speedy.net wrote: Hi everyone, I'm looking for a free software to wipe files (permanently delete files) on Windows. In the past I used PGP, but I prefer a free software. I'm using TrueCrypt, but I didn't find any way to wipe files with TrueCrypt. I tried Google but I can't find this software. You are aware that both the programs you specified are for encryption and not for wiping files, right? -- Shimi ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: wiping files
On Wed, Feb 9, 2011 at 12:51, shimi linux...@shimi.net wrote: On Wed, Feb 9, 2011 at 11:24 AM, Uri Even-Chen u...@speedy.net wrote: Hi everyone, I'm looking for a free software to wipe files (permanently delete files) on Windows. In the past I used PGP, but I prefer a free software. I'm using TrueCrypt, but I didn't find any way to wipe files with TrueCrypt. I tried Google but I can't find this software. You are aware that both the programs you specified are for encryption and not for wiping files, right? PGP can be used to wipe files. I use TrueCrypt for encryption. Uri Even-Chen Mobile Phone: +972-50-9007559 E-mail: u...@speedy.net Website: http://www.speedy.net/ ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: wiping files
On Wed, Feb 9, 2011 at 1:01 PM, Uri Even-Chen u...@speedy.net wrote: On Wed, Feb 9, 2011 at 12:51, shimi linux...@shimi.net wrote: On Wed, Feb 9, 2011 at 11:24 AM, Uri Even-Chen u...@speedy.net wrote: Hi everyone, I'm looking for a free software to wipe files (permanently delete files) on Windows. In the past I used PGP, but I prefer a free software. I'm using TrueCrypt, but I didn't find any way to wipe files with TrueCrypt. I tried Google but I can't find this software. You are aware that both the programs you specified are for encryption and not for wiping files, right? PGP can be used to wipe files. I use TrueCrypt for encryption. It's just a file shredder (similar to Linux's 'shred'), it has nothing to do with PGP's [encryption] functionality... You're looking for a free shredding tool for Windows? http://www.google.com/search?q=shred+utility+for+windows 's first result: http://www.fileshredder.org/ -- Shimi ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: wiping files
On Wed, Feb 9, 2011 at 11:24 AM, Uri Even-Chen u...@speedy.net wrote: Hi everyone, I'm looking for a free software to wipe files (permanently delete files) on Windows. In the past I used PGP, but I prefer a free software. I'm using TrueCrypt, but I didn't find any way to wipe files with TrueCrypt. I tried Google but I can't find this software. Hmm... You use Windows. You are looking for tools. You prefer free software. How come you don't install Cygwin on every Windows box as the first thing after first boot? ;-) It comes with shred(1). (I am assuming this is what you mean by wyping files). -- Oleg Goldshmidt | o...@goldshmidt.org ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
RE: wiping files
Hi, If you're stuck with Windows, then Eraser (http://eraser.heidi.ie/) is a nice shred(1) equivalent + integration into Windows (e.g., right-click on a file gives you 'Erase' in the menu, support for copy+erase original, etc.). Rony -Original Message- From: linux-il-boun...@cs.huji.ac.il [mailto:linux-il-boun...@cs.huji.ac.il] On Behalf Of Uri Even-Chen Sent: Wednesday, February 09, 2011 11:24 AM To: linux-il Subject: wiping files Hi everyone, I'm looking for a free software to wipe files (permanently delete files) on Windows. In the past I used PGP, but I prefer a free software. I'm using TrueCrypt, but I didn't find any way to wipe files with TrueCrypt. I tried Google but I can't find this software. Thanks, Uri Even-Chen Mobile Phone: +972-50-9007559 E-mail: u...@speedy.net Website: http://www.speedy.net/ ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: wiping files
Thank you. Wiping files is part of pretty good privacy (PGP) - if you want privacy you need to wipe your deleted files. Uri Even-Chen Mobile Phone: +972-50-9007559 E-mail: u...@speedy.net Website: http://www.speedy.net/ On Wed, Feb 9, 2011 at 13:07, shimi linux...@shimi.net wrote: On Wed, Feb 9, 2011 at 1:01 PM, Uri Even-Chen u...@speedy.net wrote: On Wed, Feb 9, 2011 at 12:51, shimi linux...@shimi.net wrote: On Wed, Feb 9, 2011 at 11:24 AM, Uri Even-Chen u...@speedy.net wrote: Hi everyone, I'm looking for a free software to wipe files (permanently delete files) on Windows. In the past I used PGP, but I prefer a free software. I'm using TrueCrypt, but I didn't find any way to wipe files with TrueCrypt. I tried Google but I can't find this software. You are aware that both the programs you specified are for encryption and not for wiping files, right? PGP can be used to wipe files. I use TrueCrypt for encryption. It's just a file shredder (similar to Linux's 'shred'), it has nothing to do with PGP's [encryption] functionality... You're looking for a free shredding tool for Windows? http://www.google.com/search?q=shred+utility+for+windows 's first result: http://www.fileshredder.org/ -- Shimi ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: wiping files
On Wed, Feb 9, 2011 at 9:50 PM, Uri Even-Chen u...@speedy.net wrote: Thank you. Wiping files is part of pretty good privacy (PGP) - if you want privacy you need to wipe your deleted files. I would trust having them all at encrypted-state at all times (and avoiding using swap) to be a must better approach. I couldn't care less if someone takes my random data which he has no key for, and read it for fun... I suspect this is not too different than reading /dev/random. -- Shimi ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
