Get Armed Against Forensic Infringement

Continued from page: 1

Thursday, September 06, 2007

Print

Comment

Email

Digg

Del.icio.us

Reddit

Twitter

BlindSide
This is a stegnographic as well as a cryptographic tool. Using stegnography, a file can be hidden within another file of same or other format. This technique is frequently used by digital image publishers for attaching a licensed file with an image and is similarly used to add copyright information to the images of a website. This tool lets you hide text files inside any provided .bmp file and lets you encrypt the resultant file with a password. The changes made to the resultant .bmp file are unnoticeable to the naked eye.

This is a command line tool that can be downloaded from the www.shortenurl.com/9irgm. You can perform four basic operations with it-calculate how much data can be stored within a .bmp image file, hide and restore files from a .bmp image and list the files encrypted in a .bmp image. Using it is a piece of cake. Just open the command prompt and go to the location where you have extracted BlindSide files. Now, to check the capacity of a .bmp image in which you want to hide the files run

BSIDE.exe –C

To hide a file, run the following command

“ BSIDE.exe -A < file to hide> [password]

In the first argument provide name of the .bmp image in which you want to hide a file and in the second argument provide the name and location of the file you want to hide inside the image. Password argument is optional, define it, if you want to encrypt your file with a password. To list files hidden in a .bmp image run

BSIDE.exe –L

DBAN
DBAN (Darik's Boot and Nuke) is a tool for securely wiping contents of a hard disk . It provides six methods for wiping that include Quick Erase, RCMP TSSOT OPS-II, DOD Short, DoD 5220.22-M,Gutmann Wipe, PRNG Stream. Quick Erase fills the hard drive with zeros, while Gutmann wipe performs 27 random passes with a specific data pooled with eight passes of random data. DoD Short method makes 1, 2 and 7 of seven passes recommended in DoD 5220.M standard. DoD5220-22.M standard fills the Hard disk using random characters and data streams. The 'PRNG stream' method fills the device with a stream from pseudorandom number generator(PRNG).This utility comes embedded with two PRNG's namely Mersenne Twister and ISAAC.

To wipe a Hard disk with DBAN, you need to boot the machine with DBAN media that can be downloaded from www.dban.sourceforge.net. You can install a DBAN on a floppy drive, USB drive, CD or a DVD drive. Once you have booted from DBAN media, it will ask you to select the mode you want to run it in. To automatically wipe off your HDD without any further prompting, type 'autonuke' in the boot option and press 'Enter.' To start it in an interactive mode just press 'Enter,' you would be asked to select the partition you want to wipe. Press 'M' to select a method from the list of six available methods for wiping and press 'Enter'.To start wiping process of the drives press F10. Once DBAN has wiped all the drives, it will ask you to insert a floppy disk on which it will save the log files,and then you are done.

In DBAB you can choose amongst six wiping methodes for disk using the same method

Page(s)   1  2