Tamper Evidence vs Tamper Resistance: What Should Buyers Specify?

Tamper evidence shows that interference has occurred. Tamper resistance makes unauthorized interference more difficult. For buyers, the choice depends on the security problem you need to solve. If you mainly need to know whether something has been opened, tamper evidence may be sufficient. If unauthorized access needs to be physically more difficult, specify greater resistance. For higher-risk applications, you may need both.

Practical Decision Framework

1. Need to detect opening? Start with a tamper-evident seal for applications such as meters, bags, cabinets, and general cargo.
2. Need greater physical resistance? Specify a security seal designed for the level of resistance required by the application.
3. Securing an international freight container? Check whether an ISO 17712 security or high-security seal is required.
4. Need shipment traceability? Specify clear, durable identification such as sequential numbering or suitable marking.
5. Need controlled removal? Make sure authorized personnel can remove the seal using the intended procedure.

In simple terms: detection calls for tamper evidence; greater resistance calls for a stronger security specification. Where both matter, specify both.

Why “Tamper-Proof” Is the Wrong Specification

No physical security seal should be treated as impossible to defeat. A better purchasing specification defines the required security level, seal class, identification, application, and removal method.

For container applications, ISO 17712 provides classifications and requirements relevant to mechanical security seals. The specification should therefore be based on the actual application rather than a generic “tamper-proof” claim.

What Should Procurement Specify?

Before requesting a quotation, define these requirements:

• Application: What are you securing?
• Security level: Detection, resistance, or both?
• Seal class: Indicative, security, or high-security?
• Identification: Sequential number, laser marking, barcode, or other marking?
• Environment: Indoor, outdoor, chemical, heat, cold, or prolonged exposure?
• Removal: How will authorized personnel remove it?
• Inspection: Can staff quickly identify a compromised seal?

This prevents two common purchasing mistakes: buying more physical resistance than the operation requires, or selecting a seal that does not provide enough resistance for the application.

Choosing the Right Seal

Acme Seals supplies tamper-evident security seals, plastic seals, cable seals, bolt seals, and high-security container seals for logistics, transportation, industrial, utility, and commercial applications.

For higher-security container applications, Acme supplies ISO 17712 high-security bolt seals and cable seals. The appropriate choice depends on the application, required security level, identification requirements, environment, and removal process.

Need Help Selecting the Right Security Seal?

Acme Seals manufactures and supplies security seals for container, logistics, transportation, industrial, and commercial applications. Send us your application, quantity, required security level, numbering or marking requirements, and removal process so we can recommend a suitable seal.

Request a quote from Acme Seals for your security seal requirements.