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Difficulty: MediumData Destruction and Disposal Methods

Match each data destruction and sanitization method to its correct operational description and capability.

  • DegaussingDisrupts magnetic fields on HDDs or tapes using a powerful magnet, rendering the drive permanently unusable.
  • Overwriting (Zero-Fill)Writes binary zeros or random bit patterns across all usable storage sectors to allow safe hardware reuse.
  • Cryptographic EraseErases the media encryption key on a Self-Encrypting Drive (SED), rendering ciphertext permanently unrecoverable.
  • Physical ShreddingUses mechanical blades to cut storage drives into tiny physical fragments, preventing any physical reuse.

Answer

Degaussing matches disruption of magnetic fields on HDDs; Overwriting matches replacing storage sectors with binary patterns for hardware reuse; Cryptographic Erase matches deleting the encryption key on Self-Encrypting Drives; Physical Shredding matches cutting storage media into tiny fragments with mechanical blades.
Each method is matched correctly based on its core sanitization technique: Degaussing alters magnetic fields on HDDs, Overwriting fills drive sectors with pattern data to allow reuse, Cryptographic Erase invalidates encryption keys on SEDs, and Physical Shredding mechanically fragments storage media.

Step-by-Step Solution

1
Identify the data sanitization mechanism for magnetic media rendered inoperable by magnetic fields.
Degaussing applies a strong electromagnetic pulse to magnetic drives (HDDs/tapes), destroying track alignment and data.
Degaussing alters magnetic domain alignment on magnetic storage media.
2
Identify the software-based method for sanitizing drive sectors to permit hardware reuse.
Overwriting (Zero-Fill) writes new patterns over drive sectors, making data unrecoverable while keeping the device operable.
Logical drive wiping allows disk reuse without physical damage.
3
Identify the method specific to Self-Encrypting Drives (SEDs).
Cryptographic Erase instantly deletes or resets the drive's media encryption key (MEK).
Without the encryption key, data stored as ciphertext on the drive cannot be decrypted.
4
Identify the method that relies on mechanical destruction into small physical pieces.
Physical Shredding physically destroys the storage medium using mechanical cutters.
Shredding guarantees complete physical destruction across all media types.

Key Concept

Data Sanitization and Destruction Methods
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Topics

Data Destruction and Disposal Methods

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