Salesforce Shield vs. Data Masking: What's the Difference?
The most common misconception in Salesforce data security: 'We have Shield, so our data is protected.' Shield encrypts data at rest.but authorized users still read the data in plaintext through the UI, SOQL, and reports. Data masking replaces data values with realistic substitutes so there is nothing sensitive to read. They solve completely different problems.
What Salesforce Shield does
Salesforce Shield Platform Encryption encrypts data at rest.in Salesforce's storage layer, in backups, and in transit. If someone with physical access to Salesforce's infrastructure tried to read your data directly from storage, the data would be unreadable without the encryption key.
This is genuinely valuable. It protects against: • Physical storage breach at Salesforce's data centers • Backup theft or unauthorized backup access • Certain infrastructure-level access vectors
Shield also includes Event Monitoring (logs of user activity and API calls) and Field Audit Trail (historical tracking of field values beyond default limits).
What Salesforce Shield does NOT do
Shield does not restrict what authorized users can see. If a user has the field-level security permission to view a field, they see the plaintext value.regardless of whether Shield is enabled. This is by design: Shield encrypts data in storage; application-level access is controlled by permissions, not encryption.
This means Shield does not protect against: • A developer querying customer PII via SOQL in a sandbox • A contractor viewing contact names and addresses in the Salesforce UI • A support engineer with broad permissions accessing financial records • Anyone with sandbox access reading production-copied personal data
The threat model Shield addresses is infrastructure breach. The threat model most organizations face is authorized user access to data they shouldn't need.
What data masking does
Data masking replaces real personal data values with realistic-looking substitutes before a sandbox environment is made accessible. The substitutes are indistinguishable from real data in format and structure.but they belong to no real person.
When a developer queries a masked sandbox: ``` SELECT FirstName, LastName, Email FROM Contact LIMIT 1 ``` They get: `James | Richardson | j.richardson@dev-safe.example.com`
Not: `Sarah | Thompson | sarah.thompson@customeremail.com`
The masked data behaves exactly like real data for testing purposes. The developer never sees a real person's information.
Comparing the threat models
| Threat | Shield | Data Masking |
|---|---|---|
| Infrastructure breach (storage access) | ✓ Protects | ✗ Not applicable |
| Authorized user reads PII in sandbox | ✗ Does not protect | ✓ Protects |
| Developer runs SOQL against production data copy | ✗ Does not protect | ✓ Protects |
| Contractor with sandbox access views customer records | ✗ Does not protect | ✓ Protects |
| Backup theft | ✓ Protects | ✗ Not applicable |
| GDPR Art. 32 sandbox compliance | ✗ Does not address | ✓ Addresses |
| HIPAA §164.312 non-production PHI | ✗ Does not address | ✓ Addresses |
They operate at different layers of the security stack. Shield secures the infrastructure layer. Data masking secures the application data layer for non-production environments.
Do you need both?
For most organizations, yes.they're complementary:
- Shield protects production data at the infrastructure level. Required for highly regulated environments (healthcare, government) and organizations with strict data residency requirements.
- Data Masking protects non-production environments. Required for any organization that uses full-copy sandboxes and grants access to developers, QA teams, or contractors.
Shield is not a substitute for data masking, and data masking is not a substitute for Shield. They address different aspects of Salesforce data security.
Key Takeaways
Shield encrypts data at rest.authorized users still see data in plaintext regardless of Shield status.
Data masking replaces values with realistic substitutes.there is nothing sensitive to read, regardless of permissions.
Shield addresses infrastructure breach. Data masking addresses authorized user access in sandbox environments.
GDPR Art. 32, HIPAA §164.312, and SOC 2 CC6.6 all require non-production data controls that Shield alone does not satisfy.
Both are valuable.they operate at different layers of the security stack and should be used together.
Frequently Asked Questions
See how this works in your Salesforce org
30-minute demo tailored to your specific use case and data model.