Business laptop security (13 posts)

I know the best practice for securing laptops is to encrypt the harddisks, but how many people out there are actually doing it?

What are some other ways being used to secure laptops used for work?

Hi, If you worry about the

Hi,

If you worry about the data on your laptops, you can try nokvault, it is the ultimate file security software that acts as a personal electronic safe, providing you the absolute protection for your sensitive data.

Plenty are doing it in Linux using LUKS (Ubuntu alternative installer walks you through this) ... On Windows, look into Truecrypt; that will also encrypt your entire drive.

http://www.ubuntu.com http://www.truecrypt.com

Hello, Is it true that using

Hello, Is it true that using Customer Relationship Management System nz is more efficient with linux on laptops rather than with windows?

Encryption Technology In

Encryption Technology

In order to protect information from unauthorized access, apply encryption technology. However, users who do not have adequate knowledge about the encryption method, it may be a false feeling that all sensitive data is protected. Consider the basic data encryption technologies.

* Per-file revision encryption. The user selects the files to be encrypted. Such an approach does not require deep integration encryption capabilities into the system and, consequently, allows manufacturers to implement cryptographic multiplatform solution for Windows, Linux, MAC OS X, etc.
Encryption directories. The user creates a folder, all the data that is encrypted automatically. Unlike the previous approach is encrypted on the fly, but not on demand. In general, encryption directory rather convenient and transparent, although it is based on all the same per-file revision encryption. Such an approach requires a deep interaction with the operating system, so depending on your platform.
Encryption virtual drives. The concept of virtual disks is implemented in some tools of compression, such as Stacker or Microsoft DriveSpace. Encrypting virtual drive involves the creation of a large hidden file on your hard disk. This file is later available to the user as a separate drive (operating system "sees" it as a new logical drive). For example, drive X: \. All information stored on the virtual drive is encrypted. The main difference from previous approaches in that cryptographic software is not required to encrypt each file separately. This data is encrypted automatically only when they are written on a virtual disk or read from it. In this work the data is at the level of sectors (typically 512 bytes).
* Encrypt the entire disk. In this case, encrypted absolutely everything: the boot sector of Windows, all system files and any other information on the disk.
* Protection of the boot process. If you encrypt the entire disk, the operating system can not be started until a mechanism can not decrypt the files download. Therefore, full disk encryption and protection necessarily implies the boot process. Typically, the user must enter a password to the operating system to start. If a user enters the password correctly, the program encryption will have access to encryption keys that allow you to read further data from the disk.

Thus, there are several ways to encrypt data. Some of them are less reliable, some faster and some do not do to protect sensitive information. To be able to assess the suitability of particular techniques, we consider the problems faced by the cryptographic application in the protection of data.

Features Operating Systems

Let us examine some features of operating systems, which, despite all its positive features, often only interfere with reliable protection of confidential information. Here are the most common systemic mechanisms, leaving the attacker to a number of "loopholes" and relevant for both laptops and PDA.

* Temporary files. Many programs (including operating system) use temporary files to store intermediate data during its work. Often a temporary file recorded replica open the program file, which allows for the possibility of full recovery in the event of unforeseen disruptions. Of course, the payload of temporary files is great, but being unencrypted, these files are a direct threat to corporate secrets.
* The paging file (or swap-file). Very popular in modern operating systems, is a technology swap-file, allowing any application to provide a virtually unlimited amount of RAM. Thus, if the operating system lacks memory resources, it automatically records the data from RAM to the hard drive (swap file). As soon as the need arises to use the stored information, the operating system retrieves data from the swap-file and, if necessary, puts in a store other information. Just as in the previous case, the swap file can easily get sensitive information in an unencrypted form.
* Alignment files. Windows file system allocates the data in clusters, which may take up to 64 sectors. Even if the file has a length of several bytes, it will still take a whole cluster. Large files will be divided into portions, each the size of a cluster file system. The remainder of the partition (usually the last few bytes) will still occupy a cluster. Thus, in the last sector of the file gets random information that resides in memory at the time of the PC recording files to disk. There may be passwords and encryption keys. In other words, the last cluster of any file can contain fairly sensitive information, ranging from random data from memory and ending with the data from the e-mails and text documents, previously stored at the site.
* Shopping. When a user deletes a file, Windows moves it to the basket. While the basket is not emptied, the file can be easily restored. Nevertheless, even if empty the Recycle Bin, the data still physically remain on the disk. In other words, the deleted information is often possible to find and recover (if on top of it was recorded other data). To do this, there is a huge number of applications, some of them are free and freely available via the Internet.
* Registry Windows. The system is Windows, as well as a large number of applications that store their specific data in the registry. For example, web-browser stores in the register the domain names of the pages visited by the user. Even a text editor, Word saves in the registry file name, open the latest. This register is used when loading the OS. Accordingly, if any method of encryption running after boot into Windows, then the results of his work can be compromised.
* File System Windows NT (NTFS). It is believed that the file system with integrated access control (as in Windows NT) is safe. The fact that the user must enter a password to access their personal files, leave a false impression, as if their personal files and data are protected. Nevertheless, even the file system with built-in ACLs (Access Control List - ACL), such as NTFS, does not provide absolutely no protection against an attacker with physical access to the hard drive or administrator privileges on the computer. In both cases, the offender can gain access to sensitive data. To do this he will need a low-cost (or even free) disk editor to read the text information on a disk, to which he has physical access.
* Sleep. This mode is very popular on laptops, because it allows to save battery power at a time when the computer is turned on, but not used. When the laptop goes into sleep state, the operating system copies on disk absolutely all data in RAM. Thus, when the computer "wakes up", the operating system can easily recover its previous state. Obviously, in this case the hard disk can easily get sensitive information.
* Hidden partitions on your hard disk. A hidden partition - this is such a partition, which operating system does not show the user. Some applications (for example, those that are engaged in energy saving on laptops) use hidden partitions to store their data files instead of the usual sections. In this approach, the information posted on a hidden partition, do not protect and could easily be read by anyone using the disk editor.
* Free space and space between sections. Sector at the end of the disk does not belong to any section, sometimes they appear as free. Other non-secure place - the space between sections. Unfortunately, some applications, as well as viruses can store its data there. Even if you format a hard drive, this information will remain intact. It is easy to restore.

Thus, to effectively protect your data, not enough to simply encrypt. Necessary to ensure that copies of classified information is not "flowed" into temporary and swap-file, as well as other "hiding places" of the operating system, where they are vulnerable to an attacker.

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