killdisk.pdf

User Guide

Version Number 3.0

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Contents

Standards Used in This Guide ........................................................................................... iv

O VERVIEW

Deleting Confidential Data ..................................................................................................5

Advanced Data Recovery Systems ...............................................................................5

International Standards in Data Removal ......................................................................6

SYSTEM REQUIREMENTS

Personal Computer Minimum Requirements ......................................................................7

Drive Storage System ....................................................................................................7

Active@ KillDisk Version.....................................................................................................8

What’s New in Version 3.0 .............................................................................................8

R UNNING A CTIVE @ K ILL D ISK

Preparing a DOS-Bootable Floppy Disk..............................................................................9

System Formatting.........................................................................................................9

Copying Active@ KillDisk to a Floppy..........................................................................10

Labeling the Disk .........................................................................................................10

One-Step Method.........................................................................................................10

Modes of Operation ..........................................................................................................10

DOS Interactive Mode .................................................................................................11

DOS Command Line Mode ...............................................................................................15

Autoexecute Mode ............................................................................................................17

Erasing Data Using Autoexecute .................................................................................17

Erasing Logical Drives (Partitions) ....................................................................................18

Erase Operation Complete ...............................................................................................20

COMMON QUESTIONS

I cannot boot the machine from a floppy. What is wrong? ...........................................21

Which operating systems are supported by Active@ KillDisk? ...................................21

How is the data erased? ..............................................................................................21

E RASING P ARAMETERS

Number of Passes ............................................................................................................23

One Pass Zeros or One Pass Random .......................................................................23

User Defined ................................................................................................................23

US DoD 5220.22-M .....................................................................................................23

German VSITR ............................................................................................................23

Russian GOST p50739-95 ..........................................................................................23

Gutmann ......................................................................................................................23

Verification ........................................................................................................................23

Retry Attempts..................................................................................................................24

Ignore Errors..................................................................................................................... 24

Clear Log File before Start................................................................................................ 24

Skip Confirmation ............................................................................................................. 24

Standards Used

in This Guide

The following standards are used to provide more concise documentation:

Table 0-1 User Input

Description

Example

Action

Bold text within square

brackets

Press [Enter] .

Press the key on the keyboard that

corresponds to the message within square

brackets.

Bold text and operand

within square brackets

Press [Ctrl + B]

Together, press the combination of keys

within the square brackets.

Bold text

Click OK .

With the mouse pointer, find the icon or

button indicated and left-click that icon.

Letter "i" in the left

margin

Information worthy of noting.

Exclamation mark in

the left margin

Important information that may cause the

utility to behave incorrectly and may

damage data as a result.

O VERVIEW

This chapter gives an overview of Active@ KillDisk application.

Deleting

Confidential Data

Modern methods of data encryption are deterring unwanted network attackers

from extracting sensitive data from stored database files. Unfortunately,

attackers wishing to retrieve confidential data are becoming more resourceful

by looking into places where data might be stored temporarily. A hard drive on

a local network node, for example, can be a prime target for such a search. One

avenue of attack is the recovery of supposedly-erased data from a discarded

hard disk drive. When deleting confidential data from hard drives or removable

floppies, it is important to extract all traces of the data so that recovery is not

possible.

Most official guidelines around disposing of confidential magnetic data do not

take into account the depth of today’s recording densities. The Microsoft DOS

del command merely changes the file name so that the operating system will

not look for the file. The situation with NTFS is similar.

Removal of confidential personal information or company trade secrets in the

past might have used the format command or the DOS fdisk command.

Ordinarily, using these procedures gives users a sense of confidence that the

data has been completely removed.

The format utility actually creates new FAT and ROOT tables, leaving all

previous data on the disk untouched.

fdisk merely cleans the Partition Table (located in the drive's first sector) and

does not touch anything else.

When you use Active@ KillDisk , you can scan drives and view all files on

them - including files that have been deleted using the Microsoft DOS del

command.

Advanced Data

Recovery Systems

Advances in data recovery have been made such that data can be reclaimed in

many cases from hard drives that have been wiped and disassembled. Security

agencies use advanced applications to find cybercrime-related evidence. Also

there are established industrial spy agencies adopting sophisticated channel

coding techniques such as Partial Response Maximum Likelihood (PRML), a

technique used to reconstruct the data on magnetic disks. Other methods

include the use of magnetic force microscopy and recovery of data based on

patterns in erase bands.

Although there are very sophisticated data recovery systems available at a high

price, data can easily be restored with the help of an off-the-shelf data recovery

utility like Active@ File Recovery (www.file-recovery.net ) or Active@

UNERASER (www.uneraser.com ) , making your erased confidential data quite

accessible.

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