Hard Drives (H) - DIN Standard 66399
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DIN 66399 is now referenced as ISO/IEC 21964
DIN 66399 Material Classification H refers to information on hard drives with magnetic data carriers. The Security Levels run from H-1 to H-7 with H-1 being recommended for data carriers with general data which have to made illegible, to H-7 for data carriers with top secret data where the strictest security standards must be maintained.
H1
- Recommended, for example, for data carriers holding general data to be rendered illegible
- Particle size: mechanically/electronically inoperable
- Shredded data can be reproduced without special knowledge or equipment, although the process is time-consuming
H2
- Recommended, for example, for data carriers holding general data to be rendered illegible
- Particle size: damaged
- Shredded data can be reproduced with equipment, although the process is time-consuming
H3
- Recommended, for example, for data carriers holding sensitive, confidential and personal data
- Particle size: Deformed
- Shredded data can only be reproduced with maximum effort and special equipment
H4
- Recommended, for example, for data carriers holding particularly sensitive, confidential and personal data
- Max. material particle size 2000 mm²
- Shredded data can only be reproduced utilizing equipment that is not readily available commercially
H5
- Recommended, for example, for data carriers holding confidential information
- Max. material particle size 320 mm²
- Shredded data is unlikely to be reproduced even with special equipment
H6
- Recommended, for example, for data carriers holding confidential information demanding an exceptionally high level of security
- Max. material particle size 10 mm²
- Shredded data cannot be reproduced even with special equipment
H7
- Recommended, for example, for data carriers holding strictly confidential information demanding the highest security precautions (e.g. classified and top secret)
- Max. material particle size 5 mm²
- Shredded data cannot be reproduced in any way with the current state of science and art