Welcome to Cloak!
Cloak offers tabular and free-text anonymisation to enable agencies to anonymise data safely before data sharing and utilisation. It is available through both a Web UI and API integration, for GSIB and internet devices, and is open to select non-government entities (e.g. public healthcare).
Why Cloak
- Safe for sensitive data - approved to handle data classified up to Confidential Cloud-Eligible (CCE), Sensitive-High (SH)
- Optimised for Singaporean data - >97% recall for key PIIs like Name, NRIC and Email
- Customisable - add any custom entity using inclusion lists, pattern-matching (regex), or privately-hosted LLMs
- Collaborative - share encryption secrets across data owners so anonymisation can occur independently but still be fused using a common encrypted identifier
- Policy-compliant - designed to enable IM8 compliance, with k-anonymity testing against WOG Access Modes A and B
- Scalable - integrate via API into platforms, pipelines and workflows
Use cases
| Use case | Example |
|---|---|
| Anonymise before sending to LLMs | Strip PII in real-time via API before data reaches external LLMs or other WOG products |
| Bulk anonymisation for analysis or sharing | Anonymise large volumes of data to fine-tune models, conduct policy analysis, or share safely with internal/external collaborators |
| Daily operations and dashboarding | Anonymise operational data so dashboards and reports do not expose PII |
| Consistent anonymisation across sources | Multiple data owners anonymise independently using the same secret, producing data that can still be linked on a common encrypted identifier |
Features
Free-Text Anonymisation
- Automatically detect PII from text, documents (.docx, .pdf) and CSV files
- Select what information to keep private or visible based on your use case
- Add custom entities for domain-specific terms not covered by default detection
View the Free-Text Anonymisation guide
Tabular Data Anonymisation
- Apply diverse transformation techniques (generalisation, masking, hashing, encryption, and more)
- Test and apply k-anonymity with IM8 access mode recommendations
- Review privacy risk and utility analysis before release
View the Tabular Data Anonymisation guide
Encryption, Decryption and Secret Sharing
- Encrypt identifiers consistently across datasets using shared secrets
- Decrypt data when needed through the Web UI or API
- Enable multi-party collaboration without exposing raw data
View the Decryption and Secret Sharing guide
How to access
| Channel | Best for | Notes |
|---|---|---|
| Web UI | Manual or occasional upload-and-download jobs | No-code; includes k-anonymity recommendations. Visit cloak.gov.sg |
| API | Repeatable workflows, system integration, or high-volume jobs | Supports L2 (Analytics.gov), L3 (GCC), and L4 (internet). View the API Guide |
| Package | Cases where Web UI and API are not workable | Tabular only; provided as-is with no active maintenance. View Packages |
Pricing
Cloak is currently free for all approved users. Pricing for cost recovery may be introduced in future financial years, in line with standard GovTech product policy. For FY26, there is no charge.
Need help? Try our Support Assistant or visit the Support page.
