NIST SP 800-88

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NIST SP 800-88 provides a set of guidelines for secure media sanitization.

Sanitization Techniques

Clearing overwrites sensitive information to frustrate casual analysis

• writing new data that overwrites previous data

Purging uses more advanced techniques to frustrate laboratory analysis.

• consists of :
  • cryptoshredding
  • degaussing (magnetically)
• takes longer

Destruction completely obliterates the media rendering it unusable.

• methods:
  • shredding
  • pulverization
  • melting
  • burning

NIST Decision Flowchart