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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17 views

How do I decrypt this hard drive?

In 2011 I installed Ubuntu server edition on an old Dell that I had laying around. During the install process I was using the gui installer and opted to set disk encryption on the disk drive. During ...
2
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2answers
86 views

How to set password for pdf files?

I need to password protect my PDF file(s), because I am going to send them through email and I want anyone who would view my PDF file(s) to be prompted for a password. How can I add a password to a ...
4
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2answers
40 views

Encrypt a single file and read/edit on-the-fly

I have a single text file I want to encrypt. I can easily do so with any common software. But then, I want to be able to click on it, provide a password, and be able to read, edit, and close it. All ...
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0answers
40 views

fopen problem when mounting ecryptfs filesystem

After an unrecoverable fsck problem the mount of my encrypted /home/me filesystem isn't possible any more. The visible effects are: a) logging in though most of the selectable GUI window managers ...
2
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4answers
121 views

File encryption utility without key integrity check (symmetric key)

When encrypting a file with symmetric key, most common utilities (such as gpg, mcrypt, etc) store information in the encrypted message which can be used to verify integrity of the key during ...
2
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0answers
20 views

How do I layer compression on top of encryption on top of BtrFS, per-file?

BtrFS should support this really, but it doesn't. So ECryptFS looks like it will fill the gap. The only thing is, how would I layer compression on top of this? Reasons for compression on top of ...
1
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2answers
35 views

Non-interactive ecryptfs directory encrypt/decrypt

Can I decrypt an ecryptfs Private directory from a script? My basic use case for this type of activity is for doing remote backups. Imagine you have a machine (call it privatebox) with an encrypted ...
10
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4answers
139 views

Can swapping be disabled on the application level?

I'm currently using thunderbird with gnupg to read encrypted emails. If I understand the swapping behavior correctly, the memory pages containing the decrypted emails might be swapped out and leave ...
0
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1answer
42 views

Mounting Encfs Container

I have an encfs container in my home directory. I had been using Cryptkeeper to open the container, but since updating to Linux Mint 17 from 16 it's not working any more. Gnome Encfs manager doesn't ...
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1answer
29 views

cannot change my login screen background

I cannot change my login screen background to the desktop background in my elementary os which is based on ubuntu. I have decrypted my home folder according to this link: ...
0
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2answers
64 views

Can I decrypt EncFS files without the .encfs6.xml?

This actually happened on Mac OS X, but I believe I can get the answer here rather than on http://apple.stackexchange.com I have a directory encrypted with encfs. I accidentally deleted .encfs6.xml ...
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0answers
23 views

Why doesn't Linux IPSec implementation support fragmentation before encryption?

I am trying to address an issue where ESP packets are getting fragmented as after adding the ESP header the MTU size is exceeded. The solution—which is what everybody does—is to do the fragmentation ...
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3answers
51 views

creating and sending a self-signed public key using GnuPG in CentOS 7

I know that I can create a GPG keypair from the CentOS 7 terminal by typing gpg --gen-key and following the resulting steps, but how can I make sure that the resulting public key is self-signed? And ...
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2answers
39 views

installing GnuGPG with Thunderbird on CentOS 7

How can I install GnuPG on my CentOS 7 system? I want to use GnuPG alongside Thunderbird and Enigmail to manage pgp keys, as per the instructions in this link. The problem is that the download ...
1
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1answer
48 views

How strong is the encryption of a zip file in Linux Mint

Zip encryption has had often a bad reputation of being weak, but some would argue that a zip file encrypted using certain algorithms (such as by using AES), together with strong password, is really ...
1
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0answers
113 views

how to decrypt ecryptfs file with private key instead of passphrase

I have an encrypted share folder on my synology NAS DS413 (which uses ecryptfs). I can manually mount the encrypted folder and read the decrypted files without issue, using synologies GUI. For some ...
1
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1answer
54 views

How to encrypt data in a folder in a samba share, and share it both encrypted and decrypted?

So far I have a Debian NAS with a samba share accessible from a Windows client by user credentials. Within that share I have a folder of images encrypted by ecryptfs. A friend of mine have agreed to ...
3
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0answers
140 views

LVM Encrypted Partition without Partition Table

I have the following Problem. My Laptop is fully encrypted with LVM I know the Passphrase, but the partition table is broken. I booted from an USB Stick in this Case sdb1. Is there any hope to get ...
0
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1answer
22 views

GCM encryption mode for Debian 7.6

Does an option exist for AES-GCM 256bit encryption for client connections with OpenVPN? I've tried to google around this question, but found no algorithm how to patch my openvpn/openssl. So my ...
4
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2answers
236 views

How to decrypt hostnames of a crypted .ssh/known_hosts with a list of the hostnames?

I try to find a script to decrypt (unhash) the ssh hostnames in the known_hosts file by passing a list of the hostnamses. So, to do exactly the reverse of: ssh-keygen -H -f known_hosts Or also, to ...
0
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1answer
30 views

Install Lubuntu as 2nd OS on encrypted computer?

I have debian installed on my computer which is installed in a full encrypted disk. Having tried lubuntu in virtual box form and liking it, I want to try lubuntu out on the actual computer instead of ...
1
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2answers
89 views

How does openssl decrypt a password

I'm learning about encryption and decryption on linux and php. So I have three questions about openssl and how it generates password hashes. 1- So say I generated a password with the linux command ...
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1answer
54 views

Is my home folder encrypted?

Is there a way to check if my home folder is encrypted? I believe I checked this option during the installation, but now I'm not sure.
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0answers
32 views

How to avoid session login failure with ecryptfs

After encrypting my /home directory with the migrate-home ecryptfs-utils script I can't log in to an XFCE session on my Manjaro system from the normal login screen. If I try to, the session is ...
8
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1answer
219 views

Does QEMU/KVM use Intel AES instructions for encrypted qcow2 images if the host CPU has them?

The qcow2 image file format for KVM can use AES encryption. The encryption is applied at the cluster level: Each sector within each cluster is independently encrypted using AES Cipher Block ...
1
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1answer
285 views

How to make grub mount encrypted LVM partition

I have such boot sequence: system boots from external disk, right after start it asks about password for LVM encrypted partition (which holds /root and /home), I enter it, the partitions are mounted, ...
2
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0answers
111 views

lsof: home folder is busy, but I never logged in as that user

I'm trying to run ecryptfs-migrate-home to encrypt my home folder, but the command keeps failing the open files check. Indeed, lsof +D "/home/will" shows the same in-use files as ...
2
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1answer
62 views

Formatting LUKS encrypted disk

How do I format LUKS encrypted disk if I don't know the passphrase? I recently switched my HDD for a new SSD disk in my laptop and now when I connect the old HDD externally I can't mount disk event ...
0
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3answers
67 views

Setting Up VPN Practice/Service Without Access to Private Internet

I use Lubuntu 14.04. I've gotten concerned about encrypting my internet traffic after reading about the problems with public WiFi and intend to start using VPN. However, all my internet usage is on ...
1
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1answer
17 views

Linux Volume Encryption: Possible to specify your own Encryption Tool?

I want to use Volume Encryption on my Debian machine. Linux does have such a tool for that. But I want to use my own encryption tool to encrypt a partition. Now, is it somehow possible to specify it ...
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0answers
69 views

Does the debian setup with lvm also encrypt the swap partition?

I'm planning a fresh debian install on my notebook and want to have full disk encryption. But I mainly hibernate, which is why I want my swap to be encrypted as well. During the graphical expert ...
2
votes
1answer
64 views

How can I encrypt a file?

I would like to download some files from my server into my laptop, and the thing is that I want this communication to be as stealth and secure as it can be. So, far I came up using VPN, in that way I ...
2
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1answer
116 views

Usage of pinentry with keepass2 for gpg mail encryption

Debian Jessie, XFCE 4.10, KeePass2, IceDove (with Enigmail).. I'm using KeePass2 generated passwords for my gpg private key, to de/encrypt mails. Icedove is my client which uses the enigmail. As ...
4
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0answers
92 views

SHA512 salted hash code question

I'm puzzled by the hash (ASCII) code stored under Linux (Ubuntu) /etc/shadow. Taking a hypothetical case, let password be 'test', salt be 'Zem197T4'. By running following command, $ mkpasswd -m ...
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4answers
708 views

How to identify LVM-over-LUKS or LUKS-over-LVM

I recently installed Fedora 20. I don't recall what exact options I chose for encrypting the disk/LVM during installation. It installed fine and I can log in etc. Here is the situation I have: I ...
0
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1answer
25 views

Simple encryption for ubuntu

How can I set an encrypted directory. Once accessed with a password, all files saved into it should be encrypted on the fly. It has to be possible to back-up as it were just a big file. And I don't ...
0
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0answers
255 views

Centos 7 - Encrypted installation won't boot

I installed CentOS 7 netinstall (minimal installation) on a VServer with the following partitions: /boot - 200MB - XFS / - 50GB - XFS Encrypted swap - 512MB - swap Encrypted I ...
0
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1answer
27 views

Getting filetype of netcat output?

How can I use the file command on an output from netcat? For example: nc 192.168.1.1 1234 dGhpcyBpcyBhIHNhbXBsZSBzdHJpbmc= dGhpcyBpcyBhIHNhbXBsZSBzdHJpbmc= being the output, (sample base64 for ...
0
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0answers
21 views

fsix Gold Server with Goldkey smartcard. Need to decrypt volume

I have a client that stopped paying support to WideBand and I have no clue how to get their files off that server and onto something newer. I can logon over the network but when trying to bulk copy ...
2
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0answers
146 views

Creating an encrypted file container as a non-root user

Linux kernel 3.2.0-64-generic here (Ubuntu LTS if someone is wondering about kernel options / modules). I have some file space on this Linux server (~ 24 GB). I would like to use this space as an ...
1
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1answer
265 views

full disk encryption (including swap, possibly plausible deniability as well)

I'm looking for a method to encrypt my laptop including the swap partition. I also read trough older similar questions but mostly the answer included just a what not much of a how. (Currently I'm ...
0
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0answers
126 views

Archlinux dm-crypt setup problem

I'm trying to setup dm-crypt to have complete encrypted volume and flash drive, that contains all the /boot partition.(i.e. in terms of archwiki I want to achieve #Plain dm-crypt(bit.ly/VNLKw0) ...
2
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2answers
71 views

Automount EncFS unit

How can I automount an EncFS unit at login/start my session? I use Fedora 20 and KDE. Please don't mention apps like Cryptkeeper and so. I would rather console solutions.
3
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1answer
144 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 ...
3
votes
1answer
98 views

eCryptfs key in kernel image or initramfs

I have an embedded Linux system with unencrypted kernel image and initramfs in NAND flash. My RootFS is in SD card. I want to encrypted some files on SD Card as my SD card is easily accessible ...
3
votes
1answer
125 views

How to get correct scan codes for my laptop keyboard without pressing a key?

I have a problem with the keyboard of my laptop which doesn't work properly anymore. However I have full control of the laptop via ssh. The problem is that I use a self encrypting disk (Samsung 840 ...
0
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1answer
45 views

How to add a progress bar to cryptsetup luksFormat?

Example command. cryptsetup --hash sha512 -c aes-xts-plain64 --key-size 512 luksFormat /dev/loop0 This can take quite a while for big files / on slow disks. How to add a progress bar?
3
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3answers
855 views

Creating a GnuPG keyring for apache

Here's the scenario, we're using GnuPG to encrypt data between 2 web servers. 1 is on RHEL. GnuPG will be accessed through cgi scripts to encrypt and decrypt. So I need a keyring that the apache user ...
1
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0answers
120 views

Encrypt root file system and decrypt using U-Boot with key stored in FPGA

We are using Cyclone V, which essentially is a SOC comprised of FPGA + ARM core. Is it possible to encrypt the root file system and decrypt it by using U-Boot with a key which is located in the FPGA?
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2answers
67 views

Secure the content of a hard disk

I have to prepare a computer to give away, and I do not know who is going to use it. The computer has Debian installed, and the HDD is entirely encrypted. All users have their storage on the server. I ...