Under NIST SP 800-53 ((ISC)² CBK / NIST SP 800-53), applying Secure Design Principles in System Development establishes the authoritative rules tested on the (ISC)² CISSP. This lesson details the practical application of secure design principles like least privilege, defense in depth, fail-safe defaults, economy of mechanism, zero trust, and privacy by design within the system development lifecycle and architectural decisions. VoraPrep, verified against VoraPrep's (ISC)² CISSP blueprint.
| Principle | Description | Application in SDLC | Relevant Standard |
|---|---|---|---|
| Least Privilege | Granting users/processes only the minimum access necessary to perform their function. | Design roles with minimal permissions; implement granular access controls. | NIST SP 800-53 (AC-6) |
| Defense in Depth | Employing multiple layers of security controls to protect resources. | Layering firewalls, IDS/IPS, strong authentication, encryption, physical controls. | ISO/IEC 27001:2022 (A.5.1, A.5.14) |
| Fail-Safe Defaults | When a system fails, it should default to a secure state, denying access rather than permitting it. | Access control systems default to 'deny'; system crashes should not expose data. | CISSP CBK (2024) |
| Economy of Mechanism | Keeping security mechanisms as simple and small as possible for easier verification and fewer vulnerabilities. | Simple, modular security components; avoid overly complex configurations. | CISSP CBK (2024) |
| Zero Trust | Never trust, always verify. Assumes compromise and verifies every access request. | Micro-segmentation, strong authentication, continuous monitoring, least privilege. | NIST SP 800-207 |
| Privacy by Design | Embedding privacy into the design and operation of IT systems, networked infrastructure, and business practices. | Data minimization, pseudonymization, default privacy settings, transparency. | GDPR, CCPA (principles) |
During the development of a new industrial control system, the engineering team encounters a critical design decision regarding error handling. They decide that in the event of any system malfunction or component failure, all operations should cease, and the system should revert to a pre-defined secure, non-operational state rather than continuing in an insecure or unpredictable manner. This approach aligns with which secure design principle?
A critical infrastructure project is in its final design phase. The lead architect proposes a highly efficient, centralized authentication service that, for performance reasons, will run with elevated system privileges and manage all user and service accounts across the entire system. This design significantly reduces latency but introduces a single point of failure and compromise. As the security architect, you must evaluate this design against secure design principles, specifically considering the trade-offs between efficiency and security, and recommend modifications to mitigate the inherent risks without crippling functionality. The exam question will present a similar scenario, asking you to identify the most critical secure design principle violated and the best alternative approach.
Under NIST SP 800-53 ((ISC)² CBK / NIST SP 800-53), applying Secure Design Principles in System Development establishes the authoritative rules tested on the (ISC)² CISSP. This lesson details the practical application of secure design principles like least privilege, defense in depth, fail-safe defaults, economy of mechanism, zero trust, and privacy by design within the system development lifecycle and architectural decisions. VoraPrep, verified against VoraPrep's (ISC)² CISSP blueprint.
Test-takers often confuse the scope and application of these principles, especially when presented with scenarios that blend multiple concepts. Least Privilege: Always grant minimum necessary access. A core component of Zero Trust.
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