Shredders are divided into protection classes and security levels, which indicate which data can be shredded:
Security class 1: Normal security requirements for internal data
- Security level 1: Catalogues, brochures
- Security level 2: General internal work instructions, travel guidelines, forms
Security class 2: High need for protection of confidential and particularly sensitive data
- Security level 3: Offers, orders with individuals' address data
- Security level 4: Personnel data, employment contracts, balance sheets, personal tax documents
Security class 3: Very high protection requirements for particularly confidential and secret data
- Security level 4: Personnel data, employment contracts, balance sheets, personal tax documents (GDPR-compliant!)
- Security level 5: Medical reports, construction plans, strategy papers
- Security level 6: Research and development documents
- Security level 7: Data from intelligence or military fields