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Questions tagged [encryption]

Encryption is transforming information through a cipher to protect it from unauthorized access.

Encryption is the process of taking some information (the plain text), and transforming it (usually with a cypher and a key) so that it is secure. Assuming a sufficiently strong cypher and key have been chosen, this cyphertext can be shared widely, without the information being compromised.

The reverse of Encryption is Decryption, where the process is reversed (normally by someone holding the key and cypher details) to return the information.

See the Wikipedia Page for more details.

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How to use an encrypted disk without needing an unencrypted boot partition

I would like to know if there is a way to encrypt a linux system which does not require a small unencrypted /boot partition. In addition I would like to know if encryption can be implemented on an existing unencrypted system in such a manner that it…
aseq
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create log for an encrypted tar

I want to create an encrypted tar but also I want to have a log of what tar has compressed, I'm using the following command: tar -cvvf - --files-from=/root/backup.cfg | openssl des3 -salt -k backuppass | dd of=/root/tmp/back.encrypted But I need to…
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Application-transparent encryption among cloud-deployed servers

I'm a software engineer and not necessarily an ops guy aside from having done a developer's share of dealing with deployment issues. The individual components of the web app I'm working on will be distributed over distinct cloud-based VMs. What's…
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Sql Server - Error attaching mdf file encrypted via Encrypted File System (EFS)

I am getting an error trying to attach a database whose files were previously encrypted via EFS. The actuall error message is Msg 5120, Level 16, State 101, Line 9 Unable to open the physical file "C:\test.mdf". Operating system error 5: "5(Access…
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EFS Remote Encryption

We have been trying to setup EFS across our domain. Unfortunately Reading/Writing file over network share does not work, we get an "Access Denied" error. Another worrying fact is that I managed to get it working for 1 machine but no other would…
Apoulet
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Disable all but RC4 in apache

Our PCI compliance vendor requires that we disable all but RC4 encryption on our web server. Currently our apache config file looks like this: SSLHonorCipherOrder On SSLCipherSuite…
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Encrypting Amazon EBS Snapshots

Would love it if someone could help me out with this: The setup is a distributed LAMP architecture hosted on Amazon EC2 instances. MySQL Percona. We use Amazon's EBS snapshots for backups. We have a security requirement for encryption of sensitive…
d.howser
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How to encrypt a small folder and copy that to Google Drive or DropBox?

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 "/Volumes/KINGSTON/MyProj `dateseq`" so each time I type backup_proj, the…
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Exchange 2007 and Droid Rezound SD CARD Encryption

We have an Exchange 2007 server that supports many DROIDX phones. The configurations are setup to only enforce a pin code. However on the DROID REZOUND, it forces you to encrypt the SDCARD. This basically breaks a lot of applications it seems that…
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Possible to per file encrypt cloud storage?

With the many cloud storage providers that there now exist, would it be possible to add a layer of encryption before the files are saved? It would be possible to make an encrypted partition in a file, but having to sync a 5GB file when only 5kB have…
Sandra
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How to mount encrypted volume at login (Ubuntu 12.04, pam_mount)

I'm trying to get pam_mount working on Ubuntu 12.04. I have /dev/sda1 (encrypted partition) with /dev/dm-1 (ext4 formatted) inside it. Should ~/.pam_mount.conf.xml be trying to mount /dev/sda1 or /dev/dm-1? If I use the line:
Nick Lothian
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Does dm-crypt support journaling filesystem transactional guarantees?

I'm considering using ext4 on encrypted LVM (which uses LUKS and dm-crypt). Will the transactional guarantees in ext4's journaling be preserved? Bonus: where may I find authoritative information on this (besides the source)?
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What are the options for storing encrypted data on FreeNAS?

I'm looking at implementing a mirrored pair of FreeNAS servers as file repositories. The only question still to be answered is the physical security. I typically encrypt the underlying drives on all of my servers, but it looks like that is a…
Bryan Agee
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How do I setup a SSL mail server?

For a beginner, can anyone recommend a good method of setting up a encrypted IMAP server (on port 993) or at least TLS POP3 email ? There are plenty of examples of opportunistic client side email encryption with PGP or FireGPG or Enigmail, but…
djangofan
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Xerox scan to email and Exchange

We have two Xerox devices, a 7120 and a 7556 that we are trying to get to scan-to-email through our exchange 2010 server. Currently they are able to do so to local recipients by not authenticating. However if we want the devices to email to…
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