Data Wiping

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• Data Wiping
• Presented By
• E-Waste Recyclers India

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What is Data Wiping

• Data erasure (also called data clearing
  or data wiping) is a software-based method of
  overwriting the data that aims to completely
  destroy all electronic data residing on a
  hard disk drive or other digital media.

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What Data Wiping Does?

• When you wipe a drive, you overwrite all
  data on it with 0s, 1s, or a random mix of 0s
  and 1s.

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Why Data Wiping is necessary?

• Wouldnt the mere deletion of files be
  enough to keep your system secure? With the help
  of specially designed software applications,
  hackers can actually retrieve the files that you
  delete from your computer. To prevent these
  hacker Data Wiping process is necessary.

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Data Wiping process?

• Boot and Nuke Method
• Physical Destruction Method
• Selective File Wipe Methods

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Data Wiping process?

• Boot and Nuke Method
• Download Darik's Boot and Nuke
• Burn DBAN to a CD
• Boot from the CD
• Delete the data.

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Data Wiping process?

• Physical Destruction Method
• Remove the old hard drive
• Unscrew all the screws
• Destroy the platters

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Data Wiping process?

• Selective File Wipe Methods
• For Windows
• For Mac OS X
• For Linux (Ubuntu)

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Selective File Wipe Methods

• For Windows
• Secure delete files, directories or sanitize free
  space.
• Wipe File Overwrites the specific disk space
  occupied by the file you'd like erased.
• WBD(Wipe Bad Disk) Can wipe disks with bad
  sectors.

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Selective File Wipe Methods

• For Mac OS X
• Permanent Eraser Can be used as an alternative
  to the "Secure empty trash" option.
• Disk Utility
• srm

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Selective File Wipe Methods

• For Linux (Ubuntu)
• Wipe Package from Ubuntu Unleashed Adds secure
  multi-pass file deletion,
• like DeleteOnClick does in
• Windows.

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Contact us for Secure Data Wiping

• E-Waste Recyclers India can help you get the
  best return out of your excess IT equipment while
  ensuring that your sensitive information is
  completely
• wiped from the drives.

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Conclusion

• Data overwritten once or twice may be
  recovered by subtracting what is expected to be
  read from a storage location from what is
  actually read However by using the relatively
  simple methods presented in this paper the task
  of an attacker can be made significantly more
  difficult, if not prohibitively expensive.

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