Full Report
Part 2 of 2: The data at rest edition
Analysis Summary
# Best Practices: Data Encryption at Rest Strategies
## Overview
These practices focus on mitigating risk and meeting compliance by implementing robust encryption strategies for data stored (data at rest) across endpoints, file servers, and databases, utilizing tools like Symantec File Share Encryption, File Encryption, and Drive Encryption.
## Key Recommendations
### Immediate Actions
1. **Audit Existing Encryption Coverage:** Identify all high-value data stores (endpoints, file shares, databases) and verify their current encryption status for data at rest.
2. **Deploy Drive Encryption on Endpoints:** Immediately begin rolling out Drive Encryption (including removable media encryption) on critical user endpoints to protect stored information locally.
3. **Start User Awareness Campaign:** Launch mandatory introductory training for finance and other high-risk departments immediately, focusing on basic encryption concepts like the difference between public and private keys.
### Short-term Improvements (1-3 months)
1. **Implement File Share Encryption with Group Keys:** Transition any existing folder encryption from individual user keys to centralized **group keys** managed by group membership to simplify access administration.
2. **Restrict Folder Creation Authority:** Prevent end users from creating protected folders. Designate a dedicated administrative group responsible for creating and managing encrypted file shares.
3. **Integrate PGP Command Line for Scripted Workflows:** Implement PGP Command Line for high-volume, scripted encryption/decryption tasks on servers, ensuring these tasks utilize **server-stored private keys** rather than storing keys or passwords locally in scripts.
### Long-term Strategy (3+ months)
1. **Standardize Encryption Portfolio:** Consolidate desktop encryption tools under the unified PGP Encryption Suite (including File Share Encryption and Endpoint Encryption) for comprehensive endpoint and shared resource protection.
2. **Establish Formal User Education Program:** Institutionalize regular, role-specific encryption training that covers operations, error handling (e.g., disk corruption recovery), and protocol specifics.
3. **Standardize Secure File Exchange Protocols:** Formalize the use of File Encryption (PGP capability) for all secure file exchanges with third parties, often deployed alongside file transfer gateways.
## Implementation Guidance
### For Small Organizations
- **Prioritize Full-Disk Encryption:** Focus resources on implementing robust Drive Encryption across all organizational endpoints first, as this offers the broadest baseline protection with minimal day-to-day friction (especially if Single Sign-On is leveraged).
- **Centralized Administration:** Even with a small IT footprint, enforce centralized management for all encryption keys and access policies to prevent "folder sprawl."
### For Medium Organizations
- **Deploy File Share Encryption on Core Servers:** Target high-value file servers for File Share Encryption, leveraging group-based access management immediately to scale management efficiency.
- **Pilot PGP Command Line:** Identify one internal, high-volume data movement process (e.g., nightly batch reports) to pilot the use of PGP Command Line with server-stored keys for secure automation.
### For Large Enterprises
- **Integrate PIV Cards:** Leverage integration capabilities of endpoint encryption solutions to enforce hardware-based authentication using PIV cards where regulatory requirements or high-security mandates exist.
- **Develop Recovery Protocols:** Establish and test documented procedures for handling disk corruption scenarios, specifically training support staff on authenticating to the drive to retrieve files *before* attempting full decryption or hardware replacement.
- **Leverage Web Console Management:** Utilize a comprehensive, web-based management console for centralized oversight, monitoring compliance, and managing fleets of encrypted endpoints.
## Configuration Examples
* **File Share Access Control:** When configuring File Share Encryption, define ACLs based on directory membership in Active Directory (or equivalent IAM system) rather than listing individual user PGP keys. *Example: Grant access by adding users to the "Finance\_Encrypted\_Share\_Access" group.*
* **PGP Command Line Key Storage:** Configure the PGP Command Line tool to register with the dedicated PGP server to ensure private keys are accessed remotely at runtime, strictly avoiding local storage of private keys or passwords within operational scripts.
## Compliance Alignment
- **NIST SP 800-171:** Encryption mechanisms directly support the requirement to protect Controlled Unclassified Information (CUI) at rest.
- **ISO/IEC 27001 (A.14.2.1):** Implementing rigorous controls for data storage and transmission through specified encryption technologies ensures confidentiality.
- **CIS Controls (Control 10: Data Protection):** Specifies requirements for encryption of sensitive data, both at rest and in transit.
## Common Pitfalls to Avoid
1. **Over-reliance on Individual Keys:** Avoid complex key management by resisting the temptation to assign encryption access key-by-key; use group membership exclusively for folders.
2. **Allowing End-User Configuration:** Do not allow end users to initiate or manage the encryption of shared resources; this leads to chaotic management and orphan data access when users depart.
3. **Storing Keys in Scripts:** Never embed private keys or associated passwords directly into automated server scripts used by PGP Command Line or similar tools; leverage centralized key servers.
4. **Ignoring Post-Corruption Procedures:** Do not immediately attempt full disk decryption upon reporting disk issues; first attempt authentication via the encryption layer to salvage files.
5. **Skipping User Education:** Assume no prior knowledge; insufficient user training renders even the best encryption controls ineffective due to user error or frustration.
## Resources
- **Broadcom Solution Brief:** *Protecting Against the Assumed Breach* (Referenced for deeper dive into encryption options).
- **PGP Principles Documentation:** Consult official documentation for best practices regarding public/private key pair generation and use tailored to server automation environments.