SOC 2 Confidentiality Criteria
Protect Confidential Data
Demonstrate your commitment to protecting confidential information from unauthorized disclosure. Confidentiality criteria prove you have controls to protect sensitive data - critical for companies handling proprietary information, trade secrets, or customer confidential data.
What is SOC 2 Confidentiality Criteria?
Confidentiality criteria demonstrate that your organization protects confidential information from unauthorized disclosure. Unlike Security criteria (which is mandatory), Confidentiality is optional - but it's critical for companies handling sensitive proprietary data.
If your customers share confidential information with you (trade secrets, proprietary algorithms, financial data, strategic plans), you should include Confidentiality in your SOC 2 report.
Optional but Critical for Confidential Data Handlers
Companies handling trade secrets, proprietary data, or confidential customer information need this
Proves Data Classification & Protection
Validates systematic approach to identifying and protecting confidential data
Covers Encryption & Access Controls
Demonstrates encryption at rest/in transit and strict access controls
Required by Enterprise Customers with Proprietary Data
Companies sharing trade secrets often require Confidentiality in SOC 2 reports
Confidentiality vs Privacy vs Security
Confidentiality
Protects confidential business data (trade secrets, proprietary info)
Privacy
Protects personal data (PII, GDPR, data subject rights)
Security
Protects all data from unauthorized access (mandatory for SOC 2)
8 Key Confidentiality Controls
Implement these controls to demonstrate confidential data protection and meet SOC 2 Confidentiality criteria requirements.
Data Classification
Systematic classification of data based on sensitivity and confidentiality requirements.
Key Implementation Points
- Data classification policy documented
- Classification levels defined (Public, Internal, Confidential, Restricted)
- Data labeling and tagging procedures
- Classification review and updates
- Employee training on data classification
Encryption at Rest
Encryption of confidential data stored in databases, file systems, and backups.
Key Implementation Points
- AES-256 encryption for databases
- Encrypted file storage for confidential documents
- Encrypted backups with separate keys
- Full disk encryption for servers
- Key rotation procedures documented
Encryption in Transit
Protection of confidential data during transmission over networks.
Key Implementation Points
- TLS 1.2+ for all external communications
- VPN for remote access to confidential systems
- Encrypted API communications
- Certificate management and renewal
- Prohibition of unencrypted protocols (FTP, HTTP)
Access Controls for Confidential Data
Strict access controls ensuring only authorized personnel can access confidential data.
Key Implementation Points
- Role-based access control (RBAC) for confidential data
- Principle of least privilege enforced
- Access request and approval workflows
- Quarterly access reviews for confidential systems
- Access revocation upon termination
Non-Disclosure Agreements (NDAs)
Legal agreements to protect confidential information from unauthorized disclosure.
Key Implementation Points
- NDAs signed by all employees
- Vendor NDAs for third-party access
- Customer NDAs for mutual confidentiality
- NDA tracking and renewal processes
- Confidentiality clauses in employment contracts
Confidential Data Handling Procedures
Documented procedures for handling, storing, and disposing of confidential data.
Key Implementation Points
- Confidential data handling policy
- Secure storage requirements (encrypted, access-controlled)
- Secure disposal procedures (shredding, wiping)
- Transmission guidelines (encrypted channels only)
- Incident response for confidentiality breaches
Data Loss Prevention (DLP)
Technologies and processes to prevent unauthorized disclosure of confidential data.
Key Implementation Points
- DLP tools for email and file sharing
- USB/removable media restrictions
- Cloud storage monitoring and controls
- Screen sharing and screenshot restrictions
- DLP policy violations monitoring
Confidentiality Awareness Training
Regular training to ensure employees understand confidentiality requirements.
Key Implementation Points
- Annual confidentiality training for all employees
- Onboarding training on data classification
- Phishing simulations for confidential data protection
- Confidentiality policy acknowledgment
- Training completion tracking and reporting
Common Confidentiality Mistakes
No Data Classification Policy
Without data classification, employees don't know what data is confidential and how to protect it.
Fix: Implement data classification policy with clear levels (Public, Internal, Confidential, Restricted) and labeling procedures.
Unencrypted Confidential Data
Storing confidential data without encryption exposes it to unauthorized access.
Fix: Implement AES-256 encryption for databases, file storage, and backups containing confidential data.
Missing NDAs
Employees and vendors without NDAs have no legal obligation to protect confidential information.
Fix: Require NDAs for all employees, contractors, and vendors with access to confidential data.
Overly Broad Access to Confidential Data
Granting wide access to confidential data violates the principle of least privilege.
Fix: Implement RBAC with strict access controls and quarterly access reviews for confidential systems.
No DLP Controls
Without DLP, confidential data can be easily exfiltrated via email, USB, or cloud storage.
Fix: Implement DLP tools for email/file sharing, USB restrictions, and cloud storage monitoring.
Insecure Data Disposal
Improper disposal of confidential data (e.g., deleting files without wiping) can lead to data leakage.
Fix: Implement secure disposal procedures (shredding for physical, wiping for digital) with documented evidence.
Frequently Asked Questions
Is Confidentiality criteria mandatory for SOC 2?
No, Confidentiality is optional. Only Security criteria (CC1-CC9) is mandatory. However, companies handling confidential business data (trade secrets, proprietary algorithms, strategic plans, customer confidential information) should include Confidentiality. If your customers share confidential information with you under NDA, you likely need this criteria.
What's the difference between Confidentiality and Privacy criteria?
Confidentiality protects confidential business data (trade secrets, proprietary information, strategic plans). Privacy protects personal data (PII, GDPR compliance, data subject rights). Example: Confidentiality protects your customer's proprietary algorithm they shared with you. Privacy protects your customer's employees' personal information (names, emails, addresses). You may need both if you handle confidential business data AND personal data.
What encryption standards are required for SOC 2 Confidentiality?
Encryption at rest: AES-256 for databases, file storage, and backups. Encryption in transit: TLS 1.2+ for all external communications, VPN for remote access. Key management: Separate encryption keys for different data types, key rotation procedures, secure key storage (AWS KMS, Azure Key Vault, HashiCorp Vault). Avoid weak encryption (DES, 3DES, RC4) and unencrypted protocols (FTP, HTTP, Telnet).
Do I need NDAs for all employees for SOC 2 Confidentiality?
Yes, all employees with access to confidential data should sign NDAs or have confidentiality clauses in their employment contracts. This includes: (1) Employees - NDA or confidentiality clause in employment contract; (2) Contractors - Separate NDA before granting access; (3) Vendors - Vendor NDA for third-party access to confidential systems; (4) Customers - Mutual NDA when sharing confidential information. Track NDA signatures and renewal dates.
What evidence will auditors request for Confidentiality criteria?
Auditors will request: (1) Data classification policy - Documented classification levels and procedures; (2) Encryption evidence - Screenshots of encryption settings, key management procedures; (3) NDA tracking - List of employees/vendors with signed NDAs; (4) Access control logs - Evidence of RBAC and quarterly access reviews; (5) DLP configurations - DLP tool settings and policy violation reports; (6) Training records - Confidentiality training completion for all employees; (7) Disposal logs - Evidence of secure disposal procedures.
How do I implement data classification for SOC 2?
Step 1: Define classification levels (e.g., Public, Internal, Confidential, Restricted). Step 2: Document classification criteria (what data belongs in each level). Step 3: Implement labeling procedures (email headers, file naming, metadata tags). Step 4: Train employees on classification and handling requirements. Step 5: Conduct data inventory and classify existing data. Step 6: Implement technical controls based on classification (encryption for Confidential/Restricted, access controls, DLP rules). Step 7: Review and update classifications quarterly.
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