3
votes
1answer
104 views

md5deep utility giving wrong/different output!

md5deep utility gives different result when calculating hashes. I have used several online tools to calculate hash and they give same result but md5sum or md5deep program on linux gives different ...
0
votes
1answer
26 views

How to encrypt data in Linux while leaving access for certain app

Is there any way to set up Linux in such a way that a regular user can not view or modify an encrypted file (located on an encrypted partition probably), while he at the same time is allowed to work ...
1
vote
2answers
388 views

What are ways to encrypt a password inside an environment variable

I have this file I use to set my username and password before exporting the value. #!/bin/bash echo -n "User:"; read user echo -n "Password:"; read -s password export ...
1
vote
1answer
88 views

Setting up encryption after debian wheezy install

How do you set up encryption on your home dir after the debian wheezy install. I missed the part in the graphical install that sets that up for you. I am using the automatic partition on the whole of ...
4
votes
3answers
268 views

Poor IO due to LUKS/Software RAID/LVM ordering?

I'm trying to determine if I should re-setup my RAID array due to poor IO performance. First off, the system: i7 920 4 4TB WD 5400 Green drives CentOS 6.3 host Secondly, the disk setup: ...
3
votes
1answer
360 views

Verify if a hard drive is encrypted on Linux

How can I verify if a hard drive is encrypted in Fedora 20? If not, does it mean I have to re install Fedora to encrypt it?
5
votes
1answer
267 views

Trying to understand LUKS encryption

I decided to encrypt my root partition with LUKS+LVM. My ThinkPad setup: Samsung 830 128GB SSD 750GB HDD Core 2 Duo 2,5 GHz P9500 8GB RAM But the more I read, the less I understand about those ...
3
votes
3answers
455 views

Best practice to backup a LUKS encrypted device

What's the fastest method to backup and restore a luks encrypted device (e.g. a full encrypted usb-device to a image-file). The usb-device can be decrypted/accessed. I'm looking for a solution to ...
3
votes
1answer
1k views

Resetting password in Linux Mint when disk is encrypted

I have a system (VM, actually) with Linux Mint 15 on it. The disk is encrypted, but I remember that password -- just not the password for my account. I've tried changing the command in GRUB from ro ...
3
votes
1answer
568 views

anonymous url navigation in command line?

Is there any way to anonymize http requests through the command line? In other words, is it possible to wget a page without the requester's IP showing up?
3
votes
3answers
870 views

Encrypting loopback images without using a loopback device

I'm trying to design a firmware update system for an embedded Linux system. My plan is to send an image that can be mounted on the target system, so I don't need to unpack the entire file. I also want ...
3
votes
1answer
68 views

stat on an encrypted volume in osx takes a long time

My workstation is a MacBook Pro with an SSD. For security reasons, my main volume is encrypted. I ran this command on a folder: time find . -exec stat {} + >/dev/null real 0m5.205s user ...
3
votes
1answer
1k views

What's the easiest way to decrypt a disk partition?

I made a mistake of encrypting the entire LVM physical volume (contains both home, root, and swap) when installing a CentOS 6.4 (2.6.32-358.6.1.el6.x86_64) box. I soon came to realize that moving ...
1
vote
1answer
104 views

How to add RAID5 to existing crypto-LVM?

I recently installed Debian Wheezy and let the installer guide partition the disk using a whole partition with encryption (LVM). Later on I've added four disks and setup RAID5 on them (using mdadm). ...
3
votes
2answers
305 views

How to encrypt my system such that suspend to RAM works and is also encrypted

How can I encrypt my system (at best using lvm + dm-crypt/luks) such that suspend to RAM works and that everything is in an encrypted state when suspended to RAM?
1
vote
1answer
431 views

Booting encrypted root partion fails after system update

I have a problem booting my Debian Linux server. After a system update, GRUB loads the initrd and the system should ask for the password, but it doesn't. Instead, I get dropped to BusyBox. After ...
1
vote
1answer
96 views

Which packages contain IPsec implementations and algorithms that use it for encryption?

Which package contains the implementation of IPsec and which package contains the implementation of encryption algorithms that IPsec uses for encryption? I need to use custom crytographic algorithms ...
3
votes
2answers
2k views

How do I configure systemd to activate an encrypted swap file?

My previous question produced the commands to add an encrypted swap file: # One-time setup: fallocate -l 4G /root/swapfile.crypt chmod 600 /root/swapfile.crypt # On every boot: loop=$(losetup -f) ...
6
votes
1answer
1k views

How do I set up an encrypted swap file in Linux?

How do I set up an encrypted swap file (not partition) in Linux? Is it even possible? All the guides I've found talk about encrypted swap partitions, but I don't have a swap partition, and I'd ...
1
vote
1answer
160 views

Overwriting disk before encryption

I'm going to create encrypted lvm on my disk. As a encryption mechanism I choose dmcrypt with LUKS. Here's my question - should I overwrite (for security reasons) whole disk before creating encrypted ...
2
votes
0answers
251 views

How can I mount a dm_crypt device during boot, it fails all the time

EDIT: Problem solved, i updated from Debian 6.0.6 to 7.0.0, everything works now! I have a complex problem at booting. Basically, I have a debian apache box, as a music server in my home network. The ...
3
votes
1answer
4k views

How to remove LUKS encryption?

I tried removing LUKS encryption on my home directory using the following command: cryptsetup luksRemoveKey /dev/mapper/luks-3fd5-235-26-2625-2456f-4353fgdgd But it gives me an error saying: ...
3
votes
3answers
2k views

RAID5 recovery trying with “mdadm --create … missing”

First how I got in this situation: I had an RAID5 array with disks each 2TB (external USB-disks), I then wanted to create a larger encrypted array. Therefore I got 2 additional disks (also 2 TB each) ...
2
votes
1answer
687 views

Fast encryption for home directory with Scientific Linux (ala' RedHat)

I have a T61 with C2D T7300 CPU/4 GByte RAM. I has SL 6.3 on it, and I ticked the encrypt VG during install. If I start a "normal" windows xp on it, its ~slow.. so.. I need a little performance boost ...
3
votes
0answers
389 views

How to set up an encrypted directory to be mounted only during samba access?

(This is not about restricting client access, for which ext3 permissions do the trick) I'd like to encrypt the data on my NAS drive (Buffalo LinkStation Pro with SSH access enabled, if that matters) ...
4
votes
4answers
2k views

Recovering overwritten LVM metadata

Yesterday I was trying using the Debian install in rescue mode in order to fix my Grub (The menu-item for Debian was suddenly gone). Now I wasn't able to fix it and didn't have a lot of time, so I ...
3
votes
1answer
440 views

Followed SSD-optimization advice, now root partition won't mount rw

Tonight I decided I wanted to tweak the configuration of my Debian install on my netbook (Ideapad S10-2) to work better with the SSD I put in it. I have done this before and never had any issues but ...
1
vote
2answers
242 views

File encryption and decryption on Linux using ucrypt

A few years back, I was using the ucrypt utility on CentOS 5. Now I am using Fedora 11 and need ucrypt for file encryption and decryption, but I don't have a backup of the old system. Where can I find ...
2
votes
0answers
189 views

How do create an encrypted system with multiple Linux distributions?

A few weeks ago I created a completely encrypted system on a notebook and must say I like the idea. It's a little bit annoying to enter the password on every boot, but it's nice to know even if I ...
2
votes
3answers
717 views

Is there a good way to encrypt and store a mailbox while still being able to quickly access and search it?

I am wondering if it is possible to : Store a mailbox in a way that the system administrator (ie: root) cannot see it User(s) with the valid credentials would be able to see it AND be able to search ...
4
votes
2answers
644 views

Are there more advanced LUKS key schemes, e.g. 2 of 3 keys needed?

It seems like the two main LUKS encryption options are: USB keyfile (see http://superuser.com/questions/149578/how-can-i-use-a-keyfile-on-a-removable-usb-drive-for-my-encrypted-root-in-debian) ...
3
votes
1answer
3k views

Uninstall the Encrypted LVM function to remove the prompted password entry during Ubuntu Boot

When I installed Ubuntu 11.04 and I was offered the option of enabling "encrypted LVM" for my hard drive. After choosing that option, I am prompted for my password during boot to decrypt the LVM. ...
5
votes
1answer
2k views

Linux: LUKS and multiple hard drives

I have a Debian Linux system (amd64) installed on a RAID-1 system encrypted device (LVM on LUKS) and will have a RAID-6 of >=4 disks where I'll put my data (LUKS and maybe LVM). I think the basic ...
4
votes
2answers
435 views

How to mount an IronKey in OpenBSD?

Being that it's proprietary, maybe this isn't possible but I was wondering if anybody was successful at mounting one of these in OpenBSD. I mounted the two partitions the USB drive creates which are ...
0
votes
2answers
1k views

Grub MD5 Crypt algorithm

How does Grub's MD5 algorithm work? When you run grub-md5-crypt and enter the same password each time you get different results. Generally md5 is supposed to always return the same hash, so why does ...
2
votes
1answer
529 views

How can I encrypt a device with loop-aes under Linux?

Using Fedora/Ubuntu, how can I do it?
1
vote
1answer
334 views

What encryption to use for good performance?

I will install Ubuntu 11.04 to an encrypted VolumeGroup with the installer: http://i.stack.imgur.com/Skil9.png AES Blowfish Serpent Which one is the fastest from these 3? Or Using AES with only a ...
0
votes
2answers
432 views

Is the VG encrypted with dm_crypt OR luks? How to find out?

A system is installed with an encrypted VG. How can I find out if they used dm_crypt or luks? It's running Fedora 14, so I think it's one of those. Or are they the same thing?
-1
votes
3answers
105 views

Does PGPDesktop supports OpenBSD or e.g. Fedora?

Does PGPDesktop support OpenBSD or e.g. Fedora, or can I only encrypt my whole hard drive when I use Windows?
4
votes
3answers
803 views

slow media - disk cache tuning?

Is there any way to make the system more consistent when using LUKS? (or slow storage in general) as it is everything is snappy until the write buffer is full, then everything grinds to a halt as the ...
3
votes
1answer
1k views

Full disc encryption with GRUB2

Does anyone know of a good Howto on how to fully encrypt a HDD (even the /boot!) with GRUB2? Is it possible using fedora 14 or ubuntu 10.04?
4
votes
2answers
990 views

Migration from loop-aes to cryptsetup

I've upgraded my linux installation to kernel 2.6.38-2 (Debian testing). With the new kernel, loop-aes does not compile, so I cannot mount my encrypted volumes. I heared that it is possible to use ...
1
vote
4answers
1k views

How to install Fedora&Ubuntu with encrypted VG's on one disk?

I installed Fedora 14 first, then Ubuntu 10.04. I installed them using dm_crypt/aes256/lvm, so I used encrypted VolumeGroups. At the end of the Ubuntu install it said it cannot install GRUB, so I had ...
2
votes
1answer
562 views

How to make system automatically mount encrypted device in Linux

When I plug my external storage in , I need to automatically mount it as an encrypted device. How do I make this happen ?
15
votes
7answers
10k views

Linux boot loaders supporting full disk encryption?

Are there any Linux boot loaders supporting full disk encryption (a la TrueCrypt). I know there was work towards adding encryption support to GRUB2, but this does not seem to be ready yet. Any other ...
13
votes
3answers
4k views

Full disk encryption with password-less authentication in Linux

I have a fairly standard disk encryption setup in Debian 5.0.5: unencrypted /boot partition, and encrypted sdaX_crypt that contains all other partitions. Now, this is a headless server installation ...