Preserving privacy by encrypting block devices

Block Tech

Author(s):

The recent revelations about NSA spying have sparked renewed interest in data encryption. Encrypting at the file level is quick and easy, but if you're looking for an extra dose of protection, try encrypting the whole block device.

The two principal options for encrypting data are hardware based and software based. You can also use both options in combination, but that can be a little overkill – although, in the current climate, perhaps not.

Hardware-based encryption solutions require specialized hardware (see the box "Self-Encrypting Drive"). Software-based approaches, on the other hand, have three options for encrypting your data on a Linux system: (1) encrypting a single file, (2) encrypting a directory (with or without a virtual disk) or filesystem, and (3) encrypting a physical block device.

Encrypting files is fairly straightforward, and several tools are available for doing so, such as bcrypt, NCrypt, and 7-Zip, which can compress and encrypt files using 256-bit AES. The most popular tool is probably GnuPG, which comes with just about every Linux distribution.

[...]

Use Express-Checkout link below to read the full article (PDF).

Read full article as PDF:

Price $2.95

Related content

  • Encrypted Filesystems

    If you’re not a security expert and you're looking for a crypto filesystem, you may be wondering about the alternatives. We took at a look at some popular crypto options for Linux.

  • DM-Crypt

    If you’re serious about keeping secrets, try hard disk encryption with DM-Crypt and LUKS.

  • DM-Crypt/ LUKS

    Encrypting a home directory is easy. Encrypting your whole hard disk – including the root filesystem – takes a little more effort.

  • Encrypting with ZFS

    When a computer is lost, your data falling into the wrong hands is often more serious than the loss of hardware. In this article, we explain how to use LUKS and ZFS to encrypt a system so you can keep your privacy when you lose your laptop.

  • CD Encryption

    An encrypted hard disk on your server is no help if valuable data on CDs or DVDs falls into the hands of spies. We’ll show you some convenient solutions for encrypting data on removable media.

comments powered by Disqus

Direct Download

Read full article as PDF:

Price $2.95

News