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How To Securely Erase Data

Secure InformationWhen you erase a file on your computer, the actual data in the file is not overwritten. The space utilized by that file is simply marked as "free" for use by other data.

Once other data is written in that space, the original data becomes unrecoverable -- by most people.

Those little bits of magnetic media that store 0's and 1's are a bit more complex, however. With sensitive and sophisticated equipment, it is theoretically possible to recover data even after it has been written over.

The method to securely erase data is to write over the same physical spot on the hard disk multiple times with different patterns, effectively obliterating the magnetic signatures of the data which was once there.

Standards for Securely Erasing Data

The Defense Security Service (DSS) of the Department of Defense (DoD) has published standards for the secure deletion of magnetic media in the National Industrial Security Program Operating Manual (NISPOM): Operating Manual Supplement, as modified by the Department of Defense Overprint.

Peter Gutmann of the University of Auckland has written a better paper on the topic, Secure Deletion of Data from Magnetic and Solid-State Memory.

Now you can have a peace of mind with our secure degaussing service
• We provide both offsite and onsite services.
• Professional technician to perform your requested job.
• Guarantee 100% data sanitized, using CISA certified deguasser.
•“Rebounding Erasure” method, complied to US, DoD most recommended degaussing standard.
Data Leakage is financial lost!
Data leakage does not only cause financial lost, it is just like a time bomb which can be a real disaster, if not handle properly.
The Storage Networking Industry Association (SNIA) and Infocomm Development Authority of Singapore (IDA) had recommended a solid compliance directive for data media disposal.
It is a combination of logical data elimination (Degaussing) and secure disposal through physical destruction.
The vision of ASC is to assist any organization who needs to fulfill and uphold this final level of data protection.

Frequently Asked Questions
Q: Why the need to ensure that electronic data in storage media are securely erased and destroyed?
A: By simply discarding obsolete or damaged storage media, traces of sensitive information are being left behind and can be recovered easily. This compromises the security of the confidential data.
Q: Why isnt smashing or drilling holes on storage media a secured means of destruction?
A: Data can still be recovered by a process known as MFM (Magnetic Force Microscopy)
Q: How then to ensure that data are erased securely? A: Degaussing – Using secure data destruction equipment to permanently eliminate data from magnetic media.
Shredding – Using secure data destruction equipment to completely pulverize and reduce the media to dust.
Disintegration – Using secure data destruction equipment to destroy bulk materials into particles that cannot be reconstructed.
Q: What needs to be sanitised?
A: • CDs and DVDs
• Hard Drives
• All forms of Magnetic Media
• Optical and Flash Drives
Degaussing magnetic data storage media
AData is stored in the magnetic media, such as hard drives, floppy disks, and magnetic tape, by making very small areas called magnetic domains change their magnetic alignment to be in the direction of an applied magnetic field. This phenomenon occurs in much the same way a compass needle points in the direction of the Earth's magnetic field. Degaussing, commonly called erasure, leaves the domains in random patterns with no preference to orientation, thereby rendering previous data unrecoverable. There are some domains whose magnetic alignment is not randomized after degaussing. The information these domains represent is commonly called magnetic remanence since it is due to remanent magnetization. Proper degaussing will ensure there is insufficient magnetic remanence to reconstruct the data.

Erasure via degaussing may be accomplished in two ways: in AC erasure, the medium is degaussed by applying an alternating field that is reduced in amplitude over time from an initial high value (i.e., AC powered); in DC erasure, the medium is saturated by applying a unidirectional field (i.e., DC powered or by employing a permanent magnet). A degausser is a device that can generate a magnetic field for degaussing magnetic storage media.

ASCare Degaussing Services

Write data
A tiny recording head creates magnetic patterns by magnetizing small magnetic particles embedded in the surface of the media.
Erase data
The patterns remain on the media until changed by an opposing magnetic field with field strength greater than the coercivity level of the magnetic particle. This means that to completely remove data on the media, it must be passed through a very strong and concentrated magnetic field.
What is Degaussing?
Degaussing is a separate process from the computer system. It is a process that utilizes a machine to produce a strong electromagnetic field that destroys magnetically recorded data on a magnetic media. (E.g. hard disk and tape media...)
Who and Why degaussing is needed for your media?
• Radio/Television broadcasters: enables expensive tapes to be re-used.
• Computer departments of corporations: allows re-use of back up tapes and safe disposal of information from PC hard drives.
• Data Storage Companies: data no longer needed can be easily and efficiently erased.
• Defense Organisations: confidential and top secret information can be erased.
• CCTV Operators: allows VHS tapes to be re-used again and again.
• Audio/Video duplicators: allows re-use of any production over runs and returned out of date tapes.
• Financial Services: Banks and insurance companies can use a degausser to re-use magnetic media for voice logging systems.
• Emergency Services: Re-use tapes used in voice logging systems.
• Hospitals: erase sensitive information held on magnetic media, such as patient records no longer required.
• Universities: allows student records that are no longer needed to be erased.
Why Degauss Your Media?
In spite of all the material written about degaussing, most of it is in a format not easily understood by an average person. Let's try to answer some of the questions that cause about 90% of the confusion. But first, a glossary of terms and a couple of "Rules of Thumb". Read More
Degaussing Service in Singapore
Any enquiry, please contact our sale coordinator at Tel: 6276 9611 or
email: sales@ascon.com.sg
Alpha Storage Consultancy Pte Ltd.
2 Kallang Ave
#04-15, CT HUB @ Kallang
Singapore 339407
Fax: 6276 3211
E-mail: sales@ascon.com.sg

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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