HOW TO DELETE?

Electromagnetic data destruction

Innovations and advancements in technology has has caused a reduction in the useful lifespans of IT equipment. IT equipment that contain data storage media (i.e. hard disk drives) likely contain sensitive information for a company, which could pose a threat to the company's employees, stakeholders, or customers should it fall into wrong hands. Data privacy regulations and legislation make protection of data from unauthorised access more important than ever.

Businesses handling sensitive information, such as personally identifiable information (PII) (e.g. social security numbers, credit card numbers, bank account numbers) as well as confidential information (e.g. product information, sales reports) are under risk of uncontrolled data leakage, which could lead to incurring not only the costs of the data breach, but also criminal liability. Why are certain companies and industries troubled by the issue of data leakage? The cause most often lies in the lack of knowledge concerning the principles of efficiently rendering information inaccessible on storage media.

Permanent data deletion

Deleting a file, or moving it to "Trash" or the "Recycle Bin", does not mean that the data has been erased. There are many well-publicized stories of desktop and laptop computers being found containing confidential and highly sensitive data that is easily accessible.

In principle, there are two methods of effective data destruction: software ("soft") and hardware ("hard"). The "soft" method relies on overwriting data multiple times using specialized software, making it nearly impossible to read the data originally written to the media, even when using special data recovery tools and techniques. The primary advantage of this method is the fact that both magnetic tapes and hard drives are suitable for further reuse; however, in this case overwriting is possible only if the media is mechanically functional.

The "hard"  method is to carry out the process of electromagnetically destroying the data, which is applicable to both functional and non-functional magnetic storage media.

What is electromagnetic data destruction?

It is a method of erasing stored data irrevocably using a purpose-built degausser. The process consists of subjecting the magnetic data storage device to a strong, controlled electromagnetic field. This exposure destroys all data written to the magnetic layer of the device - both user data and factory-written servo data. After degaussing, the data on magnetic media is irrevocably erased. Even magnetic storage media with high areal densities such as 1 terabyte SATA hard disk drives and 2.5 terabyte (uncompressed) LTO tape cartridges are no longer reusable after degaussing. Certain legacy tape media which do not have factory-written servo tracks, such as 3480, may be reused as degaussing effectively "resets" the magnetic remanence to zero. Hard disk drives; however, are rendered unusable as the electromagnetic field not only destroys data written to the magnetic media but also the sensitive components on the printed circuit boards.

Let's read about procedures for data deletion (made by National Security Agency) here>>

The magnetic field of particular media

For effectively data deletion, magnetic field generating by degausser should be higher than coercivity force of erased media. Following list includes magnetic field of particular media.

tabela

Innovations and advancements in technology has has caused a reduction in the useful lifespans of IT equipment. IT equipment that contain data storage media (i.e. hard disk drives) likely contain sensitive information for a company, which could pose a threat to the company's employees, stakeholders, or customers should it fall into wrong hands. Data privacy regulations and legislation make protection of data from unauthorised access more important than ever.

Businesses handling sensitive information, such as personally identifiable information (PII) (e.g. social security numbers, credit card numbers, bank account numbers) as well as confidential information (e.g. product information, sales reports) are under risk of uncontrolled data leakage, which could lead to incurring not only the costs of the data breach, but also criminal liability. Why are certain companies and industries troubled by the issue of data leakage? The cause most often lies in the lack of knowledge concerning the principles of efficiently rendering information inaccessible on storage media.

Permanent data deletion

Deleting a file, or moving it to "Trash" or the "Recycle Bin", does not mean that the data has been erased. There are many well-publicized stories of desktop and laptop computers being found containing confidential and highly sensitive data that is easily accessible.

In principle, there are two methods of effective data destruction: software ("soft") and hardware ("hard"). The "soft" method relies on overwriting data multiple times using specialized software, making it nearly impossible to read the data originally written to the media, even when using special data recovery tools and techniques. The primary advantage of this method is the fact that both magnetic tapes and hard drives are suitable for further reuse; however, in this case overwriting is possible only if the media is mechanically functional.

The "hard"  method is to carry out the process of electromagnetically destroying the data, which is applicable to both functional and non-functional magnetic storage media.

What is electromagnetic data destruction?

It is a method of erasing stored data irrevocably using a purpose-built degausser. The process consists of subjecting the magnetic data storage device to a strong, controlled electromagnetic field. This exposure destroys all data written to the magnetic layer of the device - both user data and factory-written servo data. After degaussing, the data on magnetic media is irrevocably erased. Even magnetic storage media with high areal densities such as 1 terabyte SATA hard disk drives and 2.5 terabyte (uncompressed) LTO tape cartridges are no longer reusable after degaussing. Certain legacy tape media which do not have factory-written servo tracks, such as 3480, may be reused as degaussing effectively "resets" the magnetic remanence to zero. Hard disk drives; however, are rendered unusable as the electromagnetic field not only destroys data written to the magnetic media but also the sensitive components on the printed circuit boards.

Let's read about procedures for data deletion (made by National Security Agency) here>>