Magnetic Media (T) - DIN Standard 66399
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DIN 66399 is now referenced as ISO/IEC 21964
DIN 66399 Material Classification T refers to information on magnetic data carriers, for example ID-cards, data tapes, floppy disks, and diskettes. The Security Levels run from T-1 to T-7 with T-1 being recommended for data carriers with general data which have to made illegible, to T-7 for data carriers with top secret data where the strictest security standards must be maintained.
T1
- Recommended, for example, for data carriers holding general data to be rendered illegible
- Particle size: Mechanically inoperable
- Shredded data can be reproduced without special knowledge or equipment, although the process is time-consuming
T2
- Recommended, for example, for data carriers holding general data to be rendered illegible
- Max. material particle size 2000 mm²
- Shredded data can be reproduced with equipment, although the process is time-consuming
T3
- Recommended, for example, for data carriers holding sensitive, confidential and personal data
- Max. material particle size 320 mm²
- Shredded data can only be reproduced with maximum effort and special equipment
T4
- Recommended, for example, for data carriers holding particularly sensitive, confidential and personal data
- Max. material particle size 160 mm²
- Shredded data can only be reproduced utilizing equipment that is not readily available commercially
T5
- Recommended, for example, for data carriers holding confidential information
- Max. material particle size 30 mm²
- Shredded data is unlikely to be reproduced even with special equipment
T6
- 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
T7
- 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 2.5 mm²
- Shredded data cannot be reproduced in any way with the current state of science and art