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Overwriting Hard Drive Data: The Great Wiping Controversy

机译：覆盖硬盘数据：巨大的争议

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摘要

Often we hear controversial opinions in digital forensics on the required or desired number of passes to utilize for properly overwriting, sometimes referred to as wiping or erasing, a modern hard drive. The controversy has caused much misconception, with persons commonly quoting that data can be recovered if it has only been overwritten once or twice. Moreover, referencing that it actually takes up to ten, and even as many as 35 (referred to as the Gut-mann scheme because of the 1996 Secure Deletion of Data from Magnetic and Solid-State Memory published paper by Peter Gutmann) passes to securely overwrite the previous data. One of the chief controversies is that if a head positioning system is not exact enough, new data written to a drive may not be written back to the precise location of the original data. We demonstrate that the controversy surrounding this topic is unfounded.
机译：我们经常会在数字取证过程中听到有争议的意见，这些意见要求通过或多次使用现代硬盘来进行适当的覆盖（有时也称为擦除或擦除）。争议引起了很多误解，人们普遍认为，只要将数据覆盖一次或两次即可恢复数据。此外，引用它实际上需要多达十个，甚至多达35个（由于Gutmann在1996年从磁性和固态存储器安全删除数据，因此被称为Gut-mann方案）安全地传递覆盖以前的数据。主要争议之一是，如果磁头定位系统不够精确，则写入驱动器的新数据可能不会写回到原始数据的精确位置。我们证明围绕该主题的争议是没有根据的。

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