Opaque Security Enclosure with Segmented Stops for Cryptography Modules
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Solution Overview
Problem
Current security solutions for cryptography modules, as defined by FIPS 140-2, lack effective opacity and tamper-evident features at level 2 security standards, allowing visual inspection and potential unauthorized access to devices.
Innovation Solution
A security apparatus formed from opaque materials with tamper-evident locks and airflow features that prevent direct line of sight and require unique keys, ensuring compliance with FIPS 140-2 level 2 requirements by using a chassis with front and rear stops and covers that block visibility while allowing air circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the security apparatus uses transparent or translucent materials to allow visual inspection of the device, then the ease of operation and monitoring is improved, but the opacity and security against unauthorized access deteriorates
Solution Approach 1:
The security apparatus is divided into multiple segments including a chassis, front cover, rear cover, front stop, and rear stop. These segmented components can be independently configured - the covers can be opaque while the stops contain openings for airflow and cable access, allowing visual inspection needs to be met without compromising overall opacity and security
2Ease of operation
If the security apparatus uses simple locking mechanisms for ease of access, then the ease of operation is improved, but the tamper-evident security and reliability deteriorates
Solution Approach 1:
The locking mechanisms are pre-configured with tamper-evident features and unique key requirements before the device is deployed. The front and rear covers are designed with integrated locks that require specific keys, and the stops are pre-attached to the chassis with secure mounting, ensuring that any unauthorized access attempt is evident before access is granted
3Object-affected harmful factors
If the security apparatus uses solid opaque materials to block visibility, then the opacity and security are improved, but the airflow and cooling capability deteriorates
Solution Approach 1:
Different parts of the security apparatus have different optical and airflow properties. The front and rear stops contain openings and mesh structures that are opaque to direct line of sight but permit airflow through them. The chassis and covers are opaque for security, while the localized openings in the stops provide cooling airflow paths, thus achieving both opacity and thermal management
4Reliability
If the security apparatus includes multiple components (chassis, covers, stops) for enhanced security, then the tamper-evident features and opacity are improved, but the device complexity and manufacturing difficulty worsens
Solution Approach 1:
Multiple security functions are merged into integrated components. The front stop combines structural support, airflow management with its mesh opening, and cable access features. The rear stop similarly integrates multiple functions. The front and rear covers are designed as unified pieces that include both opaque security surfaces and integrated locking mechanisms, reducing the total number of separate parts while maintaining comprehensive security
Data Source
AI summary
According to an example, a security apparatus to house a device may include a chassis, a front stop having a front stop wall and a front stop opening, a rear stop having a rear stop wall and a rear stop opening, a front cover to be positioned in front of the front stop having a front cover opening, in which the front stop wall blocks direct line of sight into the front opening of the chassis through the front cover opening when the front cover is positioned in front of the front stop, and a rear cover to be positioned behind the rear stop having a rear cover opening, in which the rear cover blocks direct line of sight into the rear opening of the chassis through the rear cover opening when the rear cover is positioned behind the rear stop wall.