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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28 views

How does authentication work on stunnel on unix?

I am aware of how PGP cryptography works ( using private and public keys - and therefore always keeping private keys private ) but what I therefore dont understand is: why stunnel setups require a ...
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93 views

Debian on encrypted partition won't boot

I just installed Debian Testing on an encrypted partition (using the encryption feature in the installer). Problem is when I boot I enter the passphrase and then Debian starts to load a bit and then ...
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1answer
17 views

Hide/Encrypt application configuration

Is there any way to hide/crypt software config files (services such as Apache web server , Varnish and so on) from boss and others?
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0answers
77 views

Struggling to boot linux with full disk encryption from USB

I would like to be able to boot linux (mint or ubuntu preferred) on my desktop from a fully encrypted USB stick. Apparently this is possible, however the solution has eluded me. Please forgive my ...
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1answer
237 views

CentOS 7 Encrypt a PDF

I've recently upgraded our server from CentOS 6 to CentOS 7 and I am having issues getting pdf encryption working on it. On CentOS 6 I installed libgcj and then the pdftk package. I could then ...
2
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1answer
140 views

How to encrypt Linux (Debian 8) post-installation and what are the consequences?

I have certain folders in my Linux partition which I need to make sure no one can access unless the log in with my login password (or root one). I know that during installation I can encrypt with ...
3
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1answer
55 views

Decrypt a portion of a corrupted drive

I have a hard drive that got corrupted after a doing an MTP mounting of a cell phone. It was created under Fedora Core 20 using defaults. Originally, I thought I did it as an ext4 partition. I ...
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2answers
67 views

Ubuntu overwrites grub, no boot option encrypted debian

I recently installed Ubuntu 14.04 on my laptop. I already had a single Windows 7 partition and two linux partitions. The problem is that Ubuntu overwrote the grub bootloader, and now there is no ...
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1answer
53 views

Decrypting a previously create losetup device

I've created an encrypted backup in 2004, using losetup -e. I still know the passphrase, so I should be fine, but losetup is gone in the linux distributions I use. I still have a bash script for ...
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1answer
32 views

Encrypted automounting partition

I have a debian based server at home using banana-pro. One of its functions is being a backup/owncloud/nas. There is a sata drive attached to it and I want it to be encrypted. I know that for a pc I ...
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55 views

How do I encrypt a key for use with Linux's key retention service?

In Linux, an "encrypted" key can be created for use with keyctl by executing a command like keyctl add encrypted evm-key "new user:kmk-user 32" @u. The content of the key, when exported to a file, ...
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1answer
233 views

qemu with kvm guest OS is slow

I am trying to create a Windows 7 virtual machine on a Gentoo x86_64 host (kernel 3.18.9 hardened) using qemu-system-x86_64 2.3.0 with kvm enabled. I have successfully compiled the kernel and have ...
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1answer
274 views

Enable ed25519 in Debian wheezy

In Debian 7 it seems like ssh doesn't accept ed25519 keys. support for ECDSA was not added until end of 2013, but wheezy is older How do I enable this in Debian 7?
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2answers
90 views

What is happening with the Linux swap partition data when running Windows via dual-boot

Hmm, I would like to know what is happening with the data on the Linux swap partition when the Linux system is turned off and by the next start the Windows operating system via GRUB2 will start. 3 ...
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0answers
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
211 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
99 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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144 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 ...
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1answer
270 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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174 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 ...
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1answer
168 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
49 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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0answers
45 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 ...
0
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1answer
244 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
57 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?.
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3answers
141 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
137 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
137 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 ...
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2answers
124 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
837 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
35 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
66 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 ...
3
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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 ?
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2answers
124 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 count=...
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0answers
147 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
665 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
86 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
208 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!
5
votes
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
67 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
62 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
151 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?
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1answer
387 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
299 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 ? ...
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1answer
247 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
69 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
135 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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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 ...
1
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1answer
267 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 /...