encoding information in a way so that it can only be decoded if a secret is known; used to prevent exposure of data to other parties

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1
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1answer
191 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 ...
0
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1answer
173 views

Encrypted USB 2.5“ to unencrypted internal 3.5” hard drive copy speed

I am moving data from an external USB 2.5" hard drive (encrypted with cryptsetup) to an unencrypted internal 1TB 3.5" hard drive on a GNU/Linux quad-core headless server with 2GB RAM, using Midnight ...
1
vote
3answers
336 views

Can a mounted encrypted filesystem be safe from root?

I have access to a shared remote computer from which I would like to run some code I have written which uses an interpreter (not a compiled code). I would like to protect this source code from other ...
2
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0answers
329 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 ...
5
votes
1answer
7k 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: ...
2
votes
1answer
677 views

Use Linux to read contents of Windows encrypted folder

Windows allows the selective encrypting of certain files or folders. I currently have a Windows folder that is set to "encrypt contents to secure data". (The Windows partition is NTFS.) If I mount ...
0
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1answer
763 views

setup filename encryption for encrypted home folder in eCryptfs

I used ecryptfs-migrate-home to encrypt my home folder on my Debian (Testing) system. As I am a complete encryption-greenhorn, I don't know yet how to check, if the encryption succeeded. However, I ...
5
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2answers
761 views

conceal home folder completely - is ecryptfs the right choice?

On my Debian-Testing-System, I want to completely conceal the home folders. That means, I not only want the data to be encrypted, but I also want to preclude determining any (or most) information from ...
4
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2answers
433 views

How to lock a directory?

I want to block any kind of access to a certain directory unless a password is provided. It could be my root or account password. The directory is residing on an NTFS partition, and this method needs ...
1
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0answers
157 views

Installing IPSEC on FreeBSD

how to install IPSEC on two FreeBSD 9.0 machines to can send an encrypted packets between them , and let them read the encrypted packets .
4
votes
1answer
468 views

Encrypt word X to /etc/shadow encryption

I've changed my password to X and the shadow file has changed to: ahmad:$1$oYINSKjP$eCkCtJV/2dXerAD57WQPj/:15425:0:99999:7::: I see the encrypted X as $1$oYINSKjP$eCkCtJV/2dXerAD57WQPj/. How can I ...
0
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0answers
2k views

How to bypass WD MyBook Essential external HDD hardware lock?

I have a Western Digital Mybook Essential external HDD 2TB which is password locked. Well with my old OS it showed me that is unlocked, but as I changed the OS it's showing that is locked, I've ...
1
vote
1answer
320 views

How to export a private PGP email key

I have made a keypair for my email address using gnupg. I thought that I should probably keep a backup of it so that if I lose my desktop computer I can continue using the same key. Is this the ...
3
votes
3answers
4k 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
905 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 ...
25
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5answers
52k views

How to create SHA512 password hashes on command line

In Linux I can create a SHA1 password hash using sha1pass mypassword. Is there a similar command line tool which lets me create sha512 hashes? Same question for Bcrypt and PBKDF2.
4
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0answers
617 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) ...
2
votes
1answer
646 views

Which filesystem to use when a samba share should allow for NTFS encryption?

I'm using a NAS (Buffalo LinkStation Pro with SSH access, if that matters) which runs Linux (2.6.31.8 #1 Fri Jun 8 11:07:30 JST 2012 armv5tel GNU/Linux, with smbd --version = Version ...
1
vote
2answers
152 views

Encrypt IP payload + URL

I need to encrypt IP payload + request URL so that my ISP can't understand my requests. Do you know any project such as zebedee except VPNs? Tor doesn't work with my ISP, because SSL was banned, so ...
2
votes
1answer
349 views

How do I specify the keyserver with GPG?

Tutorials online say to use the option --keyserver, like this: gpg --send-keys <keyID> --keyserver 'hkp://keyserver.ubuntu.com:11371' but gpg doesn't recognise the option --keyserver. What ...
4
votes
1answer
278 views

Can linux use a mix of SHA-1 and CRYPT passwords?

We have an automated sync-routine that uses useradd to create new users on a Ubuntu 10.04 machine. The application launching the routine provided both username and CRYPT-encrypted password. However, ...
3
votes
1answer
349 views

Encrypt boot file system

I just tried to set up Debian in a VM (just testing, before installing it on a real system). I have set up 4 drives in total. 2 drives that simulate pen drives, on which I want to install the boot ...
2
votes
1answer
717 views

Is it *really* possible to directly steal a private key if it uses no passphrase?

I've read in various places, such as in this question that using an ssh key pair without a passphrase allows attackers to steal your private key if they gain access to your account. I assumed that by ...
4
votes
1answer
2k views

How to decrypt single EncFS encrypted files?

Is it possible to decrypt single EncFS encrypted files with access to .encfs6.xml configuration file and without the proper directory structure it was created? With a little help from google I found ...
6
votes
3answers
561 views

E-Mail client in linux which allows to search encrypted mail

Is there an E-Mail client for linux which allows to search old gpg encrypted mails (i.e. find all mails which contain a particular keyword in the body, including the encrypted ones).
5
votes
2answers
1k views

How to edit a .gpg file with vi?

So I created a gpg encrypted file with password: gpg -c passwords.txt.gpg how can I open it with vi, edit it, then close it? (So that no passwords.txt file will be created, the decrypted ...
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votes
3answers
2k views

How to create an encrypted container (dynamically expandable) on OpenBSD

On OpenBSD, how/with what I can create an encrypted container that can later be dynamically expanded? Can I do it with GPG? (password protection is enough) So, if I open this container and put files ...
7
votes
1answer
2k views

LVM + LUKS + SSD + Gentoo — making it all work together

I'm finding a lot of conflicting information out there, and as of yet haven't found anyone trying to pull together all of the components that I'm trying to do, so I'm hoping someone who understands ...
4
votes
4answers
3k 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 ...
5
votes
4answers
2k views

Best way to make encrypted backups while preserving permissions to a windows file system

For my home network I wanted to buy a NAS which supports disk encryption and NFS since it is important for me that the backup is encrypted but also that it preserves owner, groups and permissions ...
3
votes
5answers
2k views

Encrypt a password the same way mysql does

I've created a user ... but forgotten the password mysql> create user 'blayo'@'%' identified by 'right'; Which Linux command line tool can encrypt the password the same way mysql 5.5 does ? ...
13
votes
3answers
4k views

Encrypt OfflineIMAP Password

I'm trying to set up OfflineIMAP to authenticate via a gpg encrypted file (that way I can consolidate all my encryption to my gpg-agent process). From the documentation, it seems the only way to ...
1
vote
2answers
1k views

Prevent lots of writes on Ubuntu Server running from flash drive

I would like to have a setting, where Ubuntu Server is installed and booting from a flash drive (SanDisk Cruzer Fit 8GB), with two HDDs running in RAID1 and 4 drives running with RAID0 (only 1 drive ...
4
votes
2answers
393 views

Password protecting a system file? (e.g. /etc/resolv.conf)

I am trying to parental control myself by restricting web access via OpenDNS. The OpenDNS account password will be handed to someone trustworthy. Now, I want to put some restriction on the ...
1
vote
0answers
337 views

Multiple distros in VM with encrypted disk

I want to have a GNU/Linux setup on my computer, where I could use different distributions and isolated environments inside an operating system-level virtual machine. Then I also want to share my ...
6
votes
2answers
1k views

Optimize performance for encrypted disk

Recently I tried to copy 200GB to a 1TB external / USB2 / encrypted disk and it took 36 hours. The same copy when the disk was not encrypted took no longer than 1 hour. I am using dm-crypt (LUKS) ...
3
votes
1answer
515 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 ...
3
votes
1answer
411 views

How to disable timeout of password prompt for partition decryption during boot?

I have a computer running OpenSUSE 12.1, 64-bit, default install. How it works currently: I turn on the computer It goes through the boot process At some point during boot, I am asked for password ...
6
votes
2answers
2k views

Which partitions should I encrypt?

My laptop is currently running Windows and Fedora, but I'm planning to install Arch Linux as my sole OS soon. This current setup is using whole disk encryption through TrueCrypt, but I'm unsure if it ...
1
vote
2answers
267 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
231 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 ...
3
votes
1answer
10k views

How can I shrink a LUKS partition, what does `cryptsetup resize` do?

I am in progress of resizing a LUKS encrypted partition that contains a single ext4 filesystem (no LVM or something). The cryptsetup FAQ recommends to remove the old partition and recreate it, but ...
6
votes
2answers
809 views

How does pre-boot authentication with disk encryption work technically?

I'm looking for a solution to fully encrypt my dual-boot SSD drive (it's still new and empty, and I want to set up encryption before I put anything on it). While there's a lot of chaos on the web ...
1
vote
1answer
1k views

AES-NI accelerated ZFS v31 encryption in Solaris 11

I'm not quite sure if this is the right place to ask this, if not, feel free to migrate it to wherever it fits in. I'm testing the encryption feature in ZFS v31 in a Solaris 11.11.11 VM under ESXi ...
3
votes
1answer
93 views

Encryption of home directory for securing data after harddisk corruption

Always when I install Linux OS (e.g. Ubuntu), there is a possibility to encrypt the home directory. I was asking myself why is this useful. Is it good in the case when my harddrive is corrupted and I ...
5
votes
2answers
1k views

On Mac OS X, how to encrypt a small folder and copy that to Google Drive or DropBox?

On Mac OS X, right now I use the following to back up a small project folder to a USB Flash drive: alias a='alias' a dateseq='date "+%Y-%m-%d %H:%M:%S"' a backup_proj='cp -a ~/code/MyProj ...
0
votes
1answer
1k views

What is the default encryption type of the ssh-keygen?

When generating private/public keys with ssh-keygen what types of keys will it generate if I wont pass -t option followed with the encryption type like rsa?
2
votes
3answers
909 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 ...
7
votes
3answers
1k views

Any reason for encrypted /?

I am a big fan of linux and like trying out new distros now and then. I usually have my home folders and roots in a lvm atop an encrypted partition, but this tends to become cumbersome with every ...
4
votes
2answers
896 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) ...