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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14 views

Error booting kernel 4.5.0-rc1 on Encrypted HDD

I cloned the Git tree of the mainline Linux Kernel and compiled it(version 4.5.0-rc1). After compiling with default configuration (make defconfig) I installed it. In the grub menu I can select this ...
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1answer
22 views

Mountable deduplicating container

I want a container that I can mount which dedups files within it. Basically, I'd like to have a simple backup solution where I mount it, copy my home folder with the name "Home (Feb 9)" and it only ...
2
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1answer
41 views

Information leaks out of encrypted file system

If I only encrypt the home directory, what are some common ways for information to leak out to the unencrypted part of the file system? Aside from the obvious problems like swap space files in /tmp ...
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1answer
16 views

How do can I tell what encryption is being used with signed in luks?

What command tells you what encryption is being used by a luks partition (all the relevant information initialization vector generation scheme, mode of operation and block cipher primitive).
2
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1answer
8 views

Is cryptsetup benchmark for single or multiple queues

Let say that cryptsetup benchmarks gives 2 GiB/s performance. Is it per queue so on 4 core processor I could read from disk at 8 GiB/s (assuming I wasn't limited by SATA etc. and it would scale ...
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1answer
23 views

NFS v4 export encrypted partition. Client mounts empty dir

I have an encrypted hard drive on my Lan Server. It was encrypted using luks/dm-crypt. The server has a NFS v4 running to share files in the Lan. It works, except for the encrypted USB hard drive. If ...
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0answers
18 views

why is sTunnel failing to launch?

im a bit stuck and need help understanding what im being told as there is nothing in the log file, i get the following error when i try and run stunnel (servermode): sudo /etc/init.d/stunnel4 start ...
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26 views

I use OpenSMTPD on OpenBSD 5.8! How can I automatically encrypt E-mail with OpenSMTPD

How can I automatically encrypt all outgoing E mail? My scenario: I use XXXX@gmail.com as my relay for all Emails my OpenSMTPD Server forwards All Emails to me as well as all Emails from somewhere to ...
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0answers
24 views

How can I mount Android encrypted FS on desktop Linux?

There is "vdc" command line utility in Android. Is there something similar for regular desktop Linux? Reading of https://source.android.com/security/encryption/ didn't help.
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1answer
31 views

Encrypting a p12 certificate

I'm trying to following this documentation (see section Create a Code Signing Certificate) in oder to encrypt a p12 file but I always receive the same warning. unknown option 'Cert.p12' Am I ...
0
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1answer
43 views

No prompt on boot with full disk encryption enabled

I am able to successfully authenticate by typing in the encryption password (and hitting return), but nothing is displayed on the screen to prompt me for this information. I tend to just "wait enough ...
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0answers
23 views

Does Linux require the decryption and login passwords to be the same?

thanks for looking at this question. I have seen several other questions about eOS login loops--none solved my problem, including upgrading the kernel, deleting .Xauthority, etc. Last night I changed ...
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21 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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0answers
27 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 ...
0
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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?
0
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0answers
36 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 ...
1
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1answer
73 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 ...
1
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1answer
70 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
38 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
41 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 ...
0
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1answer
39 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 ...
0
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1answer
26 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 ...
2
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0answers
30 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, ...
0
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1answer
155 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 ...
0
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1answer
133 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?
3
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2answers
64 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
25 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
62 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
56 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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0answers
87 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
127 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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0answers
90 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
87 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
41 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
35 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
108 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
39 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
67 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
88 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
votes
1answer
86 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
54 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 ...
1
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1answer
422 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. ...
0
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0answers
30 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
57 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
votes
1answer
29 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
97 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
127 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
309 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
49 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 ...
0
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2answers
98 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!