Security Requirements

What are Security Requirements?

Security requirements are concrete rules and standards systems must satisfy for information protection. While security policies state “what to protect” and “why,” security requirements detail “how specifically to protect it” and “how to verify.”

For example: Policy says “protect customer data,” but requirements specify “minimum 12-character passwords with uppercase/lowercase/numbers/symbols,” “multi-factor authentication required,” and “database access via encrypted VPN only.”

In a nutshell: “Security’s ‘instruction manual.’ ‘Systems must be built this securely’ as a detailed checklist.”

Key points:

• What it does: Define concrete security specification standards
• Why it matters: Ensure regulatory compliance and implementation quality
• Who uses it: Developers, system designers, auditors

Scope

Standards and regulations establish requirements. NIST SP 800-53 (US National Institute of Standards) applies to US government and defense contractors. ISO 27001 is the international standard, adopted widely. GDPR violations cost companies 4% revenue or €2 billion max. Japan’s APPI increasingly requires strong requirements. PCI-DSS (Payment Card Industry) binds financial companies. HIPAA (Health Insurance Portability Accountability) mandates healthcare security.

Main Requirements

Four key areas: authentication, authorization, encryption, and audit logging.

Authentication verifies user identity—passwords basics, but multi-factor authentication (username + password + phone code) increasingly required.

Authorization grants appropriate access scope only—salespeople access customer data but not executive information. This is “least privilege principle.”

Encryption converts data unreadable without keys—internet communications (HTTPS), stored databases, and password storage all need encryption.

Audit logging records “who, when, what”—later verifying no unauthorized access or tampering.

Violation Consequences

Ignoring security requirements causes data breaches, legal liability, regulatory fines, media coverage, customer lawsuits, and system failures. 2024, major companies’ poor security caused personal information leaks totaling hundreds of billions in damages.

Related Terms

• Security Policies — Requirements implement policies
• Multi-Factor Authentication — Common authentication requirement
• Encryption — Fundamental security requirement technology
• Personal Information Protection Law — Legal requirement basis
• Audit Log — Verifies compliance

Frequently Asked Questions

Q: Who determines security requirements? A: Industry standards (ISO 27001, NIST) and policies guide. Risk analysis drives stricter requirements. Businesses tailor to information importance.

Q: Apply identical requirements everywhere? A: No. Information importance varies—customer systems need higher requirements; conference room booking lower. This is “risk-based approach.”

Q: How verify compliance? A: Penetration testing, vulnerability scanning, audit log reviews, and third-party audits check.

Q: Do requirements protect all threats? A: No. Internal theft (employees stealing data) and unknown vulnerabilities sometimes escape. Incident response plans thus matter.