標準簡介
SOC 2（服務組織控制 2）Type II 是美國註冊會計師協會（AICPA）為儲存、處理或傳輸客戶資料的服務組織所制定的稽核標準。它根據信任服務準則（TSC）評估組織與安全性、可用性、處理完整性、保密性和隱私相關的資訊系統。與評估某一時間點控制的 Type I 報告不同，Type II 報告檢驗這些控制在一段時間內（通常為 6-12 個月）的營運有效性。
SOC 2 Type II 合規對於 SaaS 公司、雲端服務供應商、資料中心和其他技術服務組織而言已變得不可或缺，以展示其對資料安全和隱私的承諾。該框架涵蓋五項信任服務準則：安全性（基礎性，所有組織必備）、可用性、處理完整性、保密性和隱私。組織根據其服務選擇適用的準則。獨立的註冊會計師進行嚴格稽核，以驗證控制是否正確設計並有效運作，向客戶、合作夥伴和利害關係人保證敏感資料受到業界最佳實務的保護。
Trust Services Criteria
Evaluates controls across five categories: security (always required), availability, processing integrity, confidentiality, and privacy.
Type II Over Time
Unlike point-in-time assessments, Type II examines the operating effectiveness of controls over a minimum 6-month period.
CPA-Issued Report
Only licensed CPA firms can issue SOC 2 reports under AICPA attestation standards, giving them legal weight and market credibility.
list_alt Trust Services Criteria
- Security (Common Criteria) — always required
- Availability — uptime and disaster recovery
- Processing Integrity — accurate, complete processing
- Confidentiality — protection of sensitive data
- Privacy — personal information handling
- Logical and physical access controls
- Change management and risk assessment
- Monitoring and incident response
Who Needs to Comply?
SaaS companies, cloud providers, data centers, and any technology service organization that stores or processes customer data. Increasingly expected by enterprise buyers during vendor due diligence.
Key Requirements
Control Environment
Demonstrate a commitment to integrity, ethical values, and competence. Define organizational structure, authority, and responsibility for internal controls.
Logical Access Controls
Implement role-based access, multi-factor authentication, and least-privilege principles. Regularly review and revoke access for terminated employees.
Change Management
Establish formal procedures for authorizing, testing, approving, and implementing changes to infrastructure, software, and configurations.
Incident Response
Define and test incident response procedures. Document incidents, root cause analysis, remediation actions, and communication to affected parties.
Vendor Management
Assess and monitor third-party service providers. Ensure sub-service organizations maintain controls consistent with your SOC 2 commitments.
Penalties & Enforcement
No legal penalties — SOC 2 is a market-driven attestation. However, failing to obtain or maintain a SOC 2 report can result in lost deals, especially with enterprise and financial sector customers who require it contractually.