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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29 views

Encrypt entire disk

I have multiple OS on my machine (debian, ubuntu and windows) I already have ubuntu and windows disks encrypted separately. I'm thinking about backing up all my data and reinstalling everything this ...
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1answer
169 views

Using GPG, encrypt a file with private key

I'm setting up a system to update software on a device and I would like to encrypt the update files using a private key that I have created and then decrypt them with the public key. All of the ...
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0answers
92 views

large file encryption with ssh's RSA key pair?

I'd like to work out a way to encrypt arbitrarily large files using users' RSA key pairs they generated for SSH purposes. They have standard id_rsa and id_rsa.pub files, and a PEM version of the pub ...
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137 views

why md5 encrypted password insert into php ldap admin extra {md5}

I am using python script to inter encrypted password into php ldap admin but the problem I am facing is LDAP add extra {md5} before the encrypted password, I simulated the code by creating two files ...
1
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1answer
234 views

USB key not mounting at boot to unlock LUKS system

I am running Debian Jessie. I have 2 hard drives with my various partitions spread across both (not RAID). Both of them are separately LUKS encrypted, and LVMs sit upon both of those. My /boot ...
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154 views

ubuntu 15.04 problem with typing password to decrypt the disk

I have a stupid problem after installation of ubuntu15.04 on lenovo e450. I install ubuntu with full-encryption disk option, but I have a problem. I cannot type password to this password box, but when ...
4
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1answer
163 views

Dropbear terminates before LUKS password prompt on Debian Jessie

I'm trying to use dropbear as a ssh server to unlock an encrypted partition which was created during Debian 8.2 setup. It boots to the password prompt (and unlocks if correct password is typed) but ...
3
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1answer
46 views

Is it necessary to encrypt a swap * file * if it will reside on an encrypted root filesytem?

I'm running Linux on my Laptop and wish to protect my data in case the machine is lost or stolen. I've configured an encrypted ArchLinux environment and have everything working the way that I want. ...
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42 views

Can you create a read only encrypted partition that root cannot write to (or remount)?

I have an encrypted partition that I would like to be mounted as read only. The catch is that I do not want a root user to be able to remount the partition as read-write unless they have the ...
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1answer
202 views

Password protect a PDF file with AES 256

I can't find a free/open-source software that password protects my PDFs with AES 256. pdftk just offers 128-bit strength.. In fact I didn't find any other tool that encrypts PDFs. What tool may I ...
2
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1answer
52 views

Encrypt multimedia files with GPG

Is it possible to encrypt pictures and other files like audio etc with GPG? If yes then how to? If not then why not?.
2
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3answers
110 views

How can I keep rsync from using encryption and compression for the file transfers after the connection is authorized?

I understand that a secure connection (i.e. ssh) is needed to authorize a connection to the remote server. But after that is authorized can the data be transmitted without encryption and compression ...
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3answers
131 views

Encrypt a hash using RSA

I have to encrypt a hash, eg: 2c1400f69867571ab4e60d3b8f01e0b17c7be89e321f91f8a07cd39eeba202e2 using the RSA algorithm by using a public key(eg: mykey.key) that was already provided to me. How do I ...
0
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1answer
126 views

OpenSSL - how to encrypt files with AES key

Our company needs to exchange data with a vendor using 128 bit AES encryption. Everything I've read suggests that AES can encrypt files using a passphrase not a pre-shared key. Is there a way to ...
4
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1answer
98 views

How to not store hdd encryption key on machine, but still mount on boot?

Setup: I'm using a raspberry pi with a USB HDD, running arch linux and syncthing for my own "cloud" sync. Problem: In case of a physical break-in where the HDD pi and HDD is stolen, I'd like to ...
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1answer
736 views

Cannot format device /dev/sda4 which is still in use

When I try to LUKS encrypt a partition on a CentOS 7 server using the command cryptsetup -y luksFormat /dev/sda4, the attempt fails with the error Cannot format device /dev/sda4 which is still in use. ...
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0answers
34 views

Encrypt traffic between enduser and application on AIX server

I have end users with Windows 7 workstations and they are using some special application (based on WS client - Oracle Tuxedo product) to connect Tuxedo server WSL service which listen on port 1419. I ...
0
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1answer
64 views

Add data in a file, but not out of content? (steganography)

I aim to hide data into .txt and .xml files, from Linux OS, aand keep it readable on any OS. With Apple OS (OS X), I used to write 'secrete' data into files (actually in the Resource Fork of the ...
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1answer
34 views

Encrypt External HardDrive that contain Data

Is there an easy way to encrypt my 2To hard-drive that is completely full, without having to buy another one format / encrypt the drive, and then finally transfer all the data over ?
5
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2answers
118 views

Creating a large file with random content: short-cut by copying?

Assume I want to create a large encrypted drive stored in a file using cryptsetup, the first step is to create a random file, assume this should be of size 3T: dd if=/dev/urandom of=$FILE bs=1G ...
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0answers
142 views

Fedora 22, disk-encryption passphrase, POST fails, dracut

I was in the process to install Fedora 22-3 on an Acer desktop with Windows 8 to create a dual-boot system. I believe to have followed reasonable guidelines on how to do this. (I reached up to point ...
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1answer
574 views

Enabling FIPS on a luks encrypted CentOS system breaks boot password

For one of my apps I need to enable FIPS for OpenSSL, while simultaneously using software disk encryption. VM #1 I launched a CentOS VM instance which was software encrypted during install. The ...
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0answers
79 views

Encrypted boot drops to shell, how to set LVM crypttab consistently? 'ALERT! {logical volume path} does not exist'

I used Luks to encrypt my whole hard drive, and created that sda drive as a physical volume. Under that volume, I create a volume group vg00 with my 3 logical volumes lv00_root, lv01_home, and ...
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2answers
170 views

How can I encrypt a large file with OpenSSL using RSA keys?

How can I encrypt a large file with a public key so that no one other than who has the private key be able to decrypt it? I don't want to use GPG!
4
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1answer
1k views

Samsung 850 Evo SSD Hardware Encryption

I'm considering purchasing a 850 Evo but I'm unsure as to the security of the encryption, especially on Linux. My research has shown that bitlocker can be used on windows instead of the insecure ATA ...
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0answers
62 views

Encryption Using Xubuntu with a Keyfile and Password

I am somewhat of a novice with Linux. I was going to use Veracrypt for full disk encryption and then boot to Xubuntu after using a keyfile and password (not even sure if this is possible with ...
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0answers
59 views

/etc/crypttab for anyusb?

On my LUKS-encrypted machine, I have edited my /etc/crypttab to inform the system that a keyfile is on a pendrive. I did this by adding a line in /etc/crypttab, using the UUID of my encrypted HDD, and ...
2
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0answers
143 views

Add disks to encrypted LVM partition

If I increase my current encrypted (dm-crypt)LVM partition by adding another disk to it, is the new disk also encrypted or do I need to setup dm-crypt on it as well?
0
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1answer
372 views

Mint, install and LUKS/LVM

I want to make my linux laptopwith LUKS Encryption. OS : Mint 17. Is it better to make the disk LUKS-encrypted: at the installation process ? after it ? Quite a noob question, I need to be sure. ...
1
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1answer
253 views

Encrypt existing disk with LUKS?

I have get informed on how prepare a LUKS system & partitions, giving a key/passphrase, etc. But for a new fresh install of linux. How to encrypt an already installed/configured linux system ? ...
1
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1answer
216 views

How to deallocate extents of physical volume? lvm, encrypted

I just install Debian 8.1. I allocated almost all disk 300 GiB to encrypted partition and a little bit for boot. I want to make smaller 50GiB encrypted physical volume and install different xen OS to ...
0
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1answer
68 views

How do I test or verify ZFS encryption is working?

How do I test or verify that the ZFS encryption is working, especially when running as a Samba share? Like if I create a ZFS pool with encryption=on, how can I tell whether a file is being properly ...
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0answers
127 views

How can i access encrypted Ubuntu /home folder in Arch Linux?

I just moved to Arch from Ubuntu and i want to have access to the Ubuntu /home folder and it's encryped. There are only two files inside /home/dscript folder. How can i access the /home folder?
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0answers
8 views

Linux tries to mount before decrypting

My hard drive has LVM running inside of a LUKS encryption. My LUKS encryption is set to decrypt on boot and my ext4 partition in LVM is set to mount at boot. For whatever reason my system hangs at ...
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0answers
123 views

Auto-mount encrypted USB issues on boot for Raspberry Pi

My previous post about what I am trying to achieve: link Essentially trying to automount and encrypted USB drive at boot. Been slowly chipping away at this and feel I get a good idea of the process ...
1
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1answer
247 views

luks volume disappears after reboot

I created a separate partition on a CentOS install (VirtualBox), and am attempting to encrypt it using cryptsetup and LUKS. I'm using the following commands to get this set up: cryptsetup luksOpen ...
1
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1answer
346 views

auto mount encrypted USB

I've actually just started dabbling in the raspeberry pi but no stranger to hacking around these controllers. Having said that, my knowledge is lacking in a few areas. A little about what I want to ...
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0answers
26 views

Strategy about cloning crypted (LUKS) systems

For a while, I ve being discussing here how to manage to clone one encrypted system on others. My plan is to build a Mint system, then to encrypt it, then to clone it. Here is my process for ...
1
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1answer
178 views

How to decrypt and copy home folder from laptop to external hard drive through live usb GUI?

I am a fairly new user to Linux and have been using Elementary OS for the last 2 weeks. Everything was working alright until just two days ago when I decided to set the default brightness level ...
0
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1answer
49 views

LUKS encryption full disk, how many RAM?

If I encrypt (dm crypt, LUKS) my whole system, how many RAM should I provide ? I've understood that LUKS volume is mounted RAM, ... If my system is 10 Gb, should I have something like RAM 12 Go ?
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0answers
25 views

Linux PGP : load key from pendrive at Boot

A Linux Mint machine owns some** encrypted files (pgp). The machine cannot run if not electrically plugged (a physical theft shuts it down immeditately). **I d like to avoid storing decryption key on ...
0
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0answers
90 views

Linux counter-theft encryption : PGP or DM-Crypt?

I am brainstorming about the best strategy for my project. I have a machine (Linux Mint) with sensitive files on it. This machine is a prototype and I'll clone the disk on some others. Each machine ...
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2answers
88 views

Linux LUKS encrypt and cloning machines

I'm working a prototype based on Mint. Mint installed + installed and configured packages. This proprotype is built on a rasp-like computer. I plan : to clone disk on several other rasp-like ...
1
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1answer
31 views

install already built Linux environment

I have configured aMint-based environment : openVpn, hostapd, and a bunch of other configured package. This is done on a rasp-like computer (OEM). I planned to clone my disk on other machines. I dont ...
0
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0answers
52 views

Encrypt some folder and hide key in Linux

I work on a Debian system (Mint actually). I'd like to encrypt some folders and files, for instance: the one with OpenVPN configuration and keys, and be able to decrypt it on the fly. My problem: ...
0
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0answers
74 views

Encryption Linux system after installation

Is it possible to encrypt a Linux system (Mint, Debian based) after installation? For an "on the fly" usage. My system is both : a client (www, ethernet), a local server (wifi). I am working on a ...
1
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1answer
75 views

Encrypt Debian-based system

I have a kind-of-raspberries park, all connected via VPN to a single one server. I'd like to encrypt each rasp', in order to avoid intrusions, if one is stolen/thieft. Each rasp' has already a system ...
3
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1answer
157 views

OS X FileVault 2 duress password

I've been attempting to add a custom script to run after the FileVault password is entered on login that will check whether it a 'special password' that will run a script in the background after ...
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2answers
296 views

Encrypting directories with gpg

I want to use GPG for local encryption only, and after reading the man file, I'm doing the following in order to encrypt a whole directory: I zip the directory with a password "zip -r -e foo foo", ...
0
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1answer
91 views

OpenVPN client config :: why is needed ca.crt?

I configured a VPN (OpenVPN, mode: multiclients-1server), CentOS Server, multiple Rasp's clients. CA.crt is needed by each client, in addition of the client.crt & client.key . I wonder... why ? ...