What is DIN Security Level Shredder? A Complete Guide to P-1 to P-7

what is DIN security level shredder is a common question. In this guide, you’ll get a clear, practical breakdown before we dive into the main sections.

What is DIN Security Level Shredder?

A DIN security level shredder is a machine designed to destroy documents according to the German DIN 66399 standard. This international standard classifies data destruction into seven distinct security levels, from P-1 for general documents to P-7 for top-secret information, based on the maximum size of the shredded particles. The higher the P-level, the smaller the shred size and the more secure the data destruction.

  • International Standard: DIN 66399 is the globally recognized benchmark for securely destroying data on various media.
  • Seven Security Levels: For paper, these are labeled P-1 (lowest security) through P-7 (highest security).
  • Particle Size Matters: The core difference between levels is the maximum allowable size of the shredded pieces, making reconstruction progressively harder.
  • Beyond Paper: The standard also covers other materials like CDs, hard drives, and microfilms, each with its own classification system.
  • Matching Level to Need: Choosing the right level depends entirely on the confidentiality of the information you are destroying.

Why Document Security Matters More Than Ever

In an age of rampant identity theft and data breaches, simply tearing up a document is no longer sufficient. Sensitive information, whether personal or professional, can be exploited if it falls into the wrong hands. Discarded bank statements, client records, medical information, and internal company memos are all potential targets.

Proper document destruction is not just a good practice; it is often a legal requirement. Regulations like the Health Insurance Portability and Accountability Act (HIPAA) for medical records and the Fair and Accurate Credit Transactions Act (FACTA) for consumer information mandate secure disposal of sensitive data. Failure to comply can lead to significant penalties and damage to an organization’s reputation.

Using a shredder that meets a specific security standard ensures that your documents are rendered unreadable and unrecoverable. This protects you, your family, your clients, and your business from fraud, identity theft, and corporate espionage. It is a fundamental component of any comprehensive data security plan.

What is DIN Security Level Shredder?

The term ‘DIN’ stands for Deutsches Institut für Normung, which is the German Institute for Standardization. While it originated in Germany, its standard for data destruction, DIN 66399, has been adopted internationally as the definitive benchmark for shredder security. It provides a clear and consistent framework for classifying the effectiveness of data destruction equipment.

This standard replaced the older DIN 32757, offering a more comprehensive system that covers not only paper but a wide range of other data carriers. When you see a shredder advertised with a ‘P-Level,’ such as P-4 or P-5, it is referencing this specific DIN 66399 standard for paper. This rating gives you a reliable measure of how small the shredded particles will be and, consequently, how secure your disposed information is.

Essentially, the DIN 66399 standard takes the guesswork out of choosing a shredder. Instead of relying on vague marketing terms like ‘high security,’ you can use the P-levels to make an informed decision based on the precise level of protection required for your documents.

Breaking Down the 7 DIN P-Levels for Paper

The DIN 66399 standard specifies seven security levels for paper, designated P-1 through P-7. Each level has a maximum particle size, making it progressively more difficult to reconstruct the original document.

P-1: For General Documents

  • Maximum Particle Size: 2,000 mm² or strips no wider than 12 mm.
  • Typical Cut Type: Strip-cut.
  • Use Case: Recommended for general internal documents with no sensitive information, such as advertisements, catalogs, or non-confidential drafts. It offers basic security and is not suitable for personal data.

P-2: For Internal Documents

  • Maximum Particle Size: 800 mm² or strips no wider than 6 mm.
  • Typical Cut Type: Strip-cut.
  • Use Case: Suitable for internal documents that are not particularly sensitive but should be unreadable, like outdated instructions, travel guidelines, or notices. This level is still considered low security.

P-3: For Sensitive, Confidential Data

  • Maximum Particle Size: 320 mm² or strips no wider than 2 mm.
  • Typical Cut Type: Cross-cut.
  • Use Case: This is the first level that offers decent security for confidential information. It is suitable for shredding company sales reports, proposals, and documents with personal data that require more protection.

P-4: For Particularly Sensitive and Confidential Data

  • Maximum Particle Size: 160 mm² with a maximum width of 6 mm.
  • Typical Cut Type: Cross-cut or Micro-cut.
  • Use Case: This is a widely recommended security level for both businesses and home offices. It is ideal for destroying personnel files, contracts, financial statements, tax documents, and medical bills. Many data protection regulations consider P-4 to be a compliant level of destruction.

P-5: For Secret Data

  • Maximum Particle Size: 30 mm² with a maximum width of 2 mm.
  • Typical Cut Type: Micro-cut.
  • Use Case: P-5 offers high security for documents that could have a significant negative impact if compromised. This includes strategic company documents, medical records, legal documents, and financial data. It makes reconstruction practically impossible with current technology.

P-6: For Secret Data Requiring Extraordinary Security

  • Maximum Particle Size: 10 mm² with a maximum width of 1 mm.
  • Typical Cut Type: High-security Micro-cut.
  • Use Case: This level is typically used by government agencies, law enforcement, and research and development departments. The resulting particles are extremely small, resembling confetti, and are suitable for top-secret documents where security is paramount.

P-7: For Top-Secret Data

  • Maximum Particle Size: 5 mm² with a maximum width of 1 mm.
  • Typical Cut Type: High-security Micro-cut.
  • Use Case: This is the highest security level available and is mandated for the destruction of top-secret and classified information by intelligence agencies and the military. Reconstruction of a document shredded to P-7 standards is considered impossible.

Understanding the 3 Protection Classes of DIN 66399

To simplify the selection process, the DIN 66399 standard groups the seven security levels into three distinct protection classes. These classes are categorized based on the potential risk associated with the data being destroyed.

Protection Class 1: Normal Security

This class is for internal data where disclosure would have a limited negative impact. It is designed for information intended for large groups. This class includes security levels P-1, P-2, and P-3.

Protection Class 2: High Security

This class is for confidential data that is restricted to a small group of people. Unauthorized disclosure could have a significant negative impact or violate legal obligations. This class includes security levels P-3, P-4, and P-5. Note that P-3 can fall into either Class 1 or 2 depending on the context.

Protection Class 3: Very High Security

This class is for confidential and top-secret data restricted to a very small, authorized group. Unauthorized disclosure could have serious, existence-threatening consequences for an organization or pose a risk to personal safety. This class includes security levels P-5, P-6, and P-7. P-5 is often the bridge between high and very high protection.

It’s Not Just Paper: Other DIN 66399 Material Categories

A key advantage of the DIN 66399 standard is its application to various types of media beyond paper. The standard includes six additional categories, each with its own set of security levels.

  • F: Film, such as microfiche and slides. Levels range from F-1 to F-7.
  • O: Optical media, including CDs, DVDs, and Blu-ray discs. Levels range from O-1 to O-7.
  • T: Magnetic data carriers, like floppy disks, ID cards with magnetic strips, and cassette tapes. Levels range from T-1 to T-7.
  • H: Hard drives from computers and laptops. Levels range from H-1 to H-7.
  • E: Electronic data carriers, such as USB drives, memory cards, and solid-state drives (SSDs). Levels range from E-1 to E-7.

When purchasing a shredder, check its specifications to see if it is rated to destroy these other materials and to what security level. A shredder rated P-4 for paper may have a different rating, such as O-3 or T-4, for CDs and credit cards.

How to Choose the Right DIN Security Level for Your Needs

Selecting the appropriate shredder security level requires a careful assessment of the information you handle. Using a level that is too low puts you at risk, while using one that is too high can be an unnecessary expense.

For Home and Home Office Use

For general household documents like junk mail, a P-2 or P-3 shredder might suffice. However, for bank statements, tax documents, medical bills, and credit card offers, a P-4 shredder is highly recommended. It provides a strong balance of security and performance for personal use.

For Small and Medium-Sized Businesses (SMBs)

Most businesses handle information that falls under Protection Class 2. A P-4 or P-5 shredder is the industry standard. P-4 is suitable for general office documents, employee information, and client data. A P-5 shredder is better for handling sensitive financial records, legal contracts, and strategic plans.

For Government, Legal, and Healthcare

Organizations in these sectors must adhere to strict compliance and data protection laws. They typically require shredders in Protection Class 3. A P-5 shredder is often the minimum requirement. For highly classified or top-secret information, P-6 or P-7 shredders are necessary to ensure complete data obliteration.

Key Shredder Features Beyond the Security Level

While the P-level is critical, other features determine a shredder’s overall performance and usability.

  • Cut Type: This is directly related to the security level. Strip-cut shredders produce long strips (P-1, P-2). Cross-cut shredders cut in two directions, creating short, thin pieces (P-3, P-4). Micro-cut shredders produce the smallest, confetti-like particles (P-4 to P-7).
  • Sheet Capacity: This indicates how many sheets of paper you can feed into the shredder at once. Higher capacity saves time.
  • Run Time and Cool-Down Time: Shredders can overheat with continuous use. The run time tells you how long it can operate before it needs to stop and cool down. Heavy-duty models have longer run times.
  • Bin Capacity: A larger bin means you have to empty the shredded waste less frequently. Consider your shredding volume when evaluating bin size.
  • Safety Features: Look for features like automatic shut-off when the bin is full or open, and safety sensors that stop the blades if hands get too close to the opening.
  • Noise Level: Shredders can be loud. If the machine will be used in a quiet office, look for models designed for low-noise operation, often measured in decibels (dB).

Frequently Asked Questions

What is a good DIN security level for a home shredder?
A P-4 security level is an excellent choice for a home shredder. It provides strong protection for sensitive personal documents like bank statements, tax records, and medical bills by turning them into small, cross-cut particles that are very difficult to reassemble.
What is the difference between a P-4 and P-5 shredder security level?
The primary difference is the particle size and the level of security. A P-4 shredder creates particles no larger than 160 mm², while a P-5 shredder produces much smaller particles, no larger than 30 mm². This makes P-5 significantly more secure and suitable for secret company or legal documents.
Is a P-7 shredder necessary for a standard office?
No, a P-7 shredder is generally unnecessary for a standard office. This level of security is designed for top-secret government and military documents. A P-4 or P-5 shredder provides more than adequate security for most commercial and business needs.
What does DIN stand for in the context of a shredder security level?
DIN stands for ‘Deutsches Institut für Normung,’ which is the German Institute for Standardization. This organization develops standards for various industries, and its DIN 66399 standard is the international benchmark for data destruction security.
How does shredder cut type relate to the DIN security level?
The cut type is directly linked to the security level. Strip-cut shredders produce long strips and correspond to lower levels like P-1 and P-2. Cross-cut and micro-cut shredders produce smaller particles and are required for higher security levels, from P-3 up to P-7.
Can a DIN security level shredder destroy credit cards and CDs?
Many shredders can, but you must check the specific model’s capabilities. The DIN 66399 standard has separate categories for these materials, such as O for optical media (CDs) and T for magnetic media (credit cards). A shredder’s manual will specify if it can handle these items and its security rating for them.

Conclusion

Understanding what a DIN security level shredder is empowers you to make an informed choice about protecting your sensitive information. The DIN 66399 standard provides a clear, tiered system from P-1 to P-7, where the security level is determined by the final shredded particle size. Higher P-levels offer greater security for more confidential documents.

By assessing the sensitivity of your data and matching it to the appropriate P-level and protection class, you can ensure compliance with privacy laws and safeguard against identity theft and data breaches. Before making a purchase, carefully evaluate your security needs to select a shredder that provides the right level of protection for your home or business.

Richard Ervin - Office Ergonomics Expert

Written By

Richard Ervin

Office Ergonomics Expert | 18+ Years Experience

Richard Ervin is the founder of OfficeToolsGuide with over 18 years of experience in office ergonomics, equipment testing, and workspace optimization. His expertise helps thousands of professionals create healthier, more productive work environments.

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