microsoft-security-utilities-secret-masker
A tool for detecting and masking secrets
Decision gist · record as of 2026-08-14
Yes, if you need straightforward secret detection and masking with no external dependencies and trust Microsoft's regex patterns. The beta status and aging maintenance mean it's stable enough for production but unlikely to evolve further—suitable for teams already using Microsoft tooling or those with simple, well-defined secret types. Not recommended if you need active maintenance, custom pattern tuning, or support for emerging secret formats.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Low install friction with no runtime dependencies.
- Package is in beta (1.0.0b4) and aging—last release was 522 days ago, suggesting limited active maintenance.
License · maintenance · safety
MIT (permissive) — MIT license permits free use, modification, and distribution with minimal restrictions, making it suitable for both open-source and commercial projects.
last release 2025-03-10 (522 days)
0 known vulnerabilities (OSV.dev, 2026-08-14) · 5,454,814 downloads/mo, #2,095 on PyPI
Alternatives
Verify before relying
pip install microsoft-security-utilities-secret-masker
from microsoft_security_utilities_secret_masker import SecretMasker, load_regex_patterns_from_json_file
patterns = load_regex_patterns_from_json_file('PreciselyClassifiedSecurityKeys.json')
secret_masker = SecretMasker(patterns)
detected = secret_masker.detect_secrets("input text")
masked = secret_masker.mask_secrets("input text")- Whether the built-in detection rules are comprehensive for your specific secret types
- Current maintenance status and whether updates are planned beyond the beta release
- Performance characteristics when processing large volumes of text
- Accuracy of regex patterns and false-positive rates in production use
What it is and what it does
This is a Microsoft-authored library for detecting and redacting sensitive information like API keys, credentials, and tokens from text. It ships with pre-built regex patterns organized by confidence level (precisely classified vs. unclassified), and provides two masking strategies: simple symbol replacement or SHA256 hashing. The library has no external runtime dependencies, making it lightweight to integrate.
The package is in beta (1.0.0b4) and maintenance is aging. It's positioned for internal Microsoft use but is publicly available. If you need to sanitize logs, audit trails, or user input before storage or transmission, this library offers a straightforward regex-based approach with Microsoft's curated detection rules.
Use it for
- Sanitize application logs before shipping them to external monitoring or storage systems
- Redact credentials and tokens from error messages or debug output shown to users
- Mask sensitive data in database exports or backups before sharing with third parties
- Clean user-generated content in support tickets or feedback forms
- Prepare training datasets by removing secrets before publishing or sharing
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need straightforward secret detection and masking with no external dependencies and trust Microsoft's regex patterns.
The beta status and aging maintenance mean it's stable enough for production but unlikely to evolve further—suitable for teams already using Microsoft tooling or those with simple, well-defined secret types. Not recommended if you need active maintenance, custom pattern tuning, or support for emerging secret formats.
Install
microsoft-security-utilities-secret-masker on PyPI
Before you install
Low install friction with no runtime dependencies. Package is in beta (1.0.0b4) and aging—last release was 522 days ago, suggesting limited active maintenance.
License in practice
MIT license permits free use, modification, and distribution with minimal restrictions, making it suitable for both open-source and commercial projects.
Quickstart
pip install microsoft-security-utilities-secret-masker
from microsoft_security_utilities_secret_masker import SecretMasker, load_regex_patterns_from_json_file
patterns = load_regex_patterns_from_json_file('PreciselyClassifiedSecurityKeys.json')
secret_masker = SecretMasker(patterns)
detected = secret_masker.detect_secrets("input text")
masked = secret_masker.mask_secrets("input text")Verify before relying
- Whether the built-in detection rules are comprehensive for your specific secret types
- Current maintenance status and whether updates are planned beyond the beta release
- Performance characteristics when processing large volumes of text
- Accuracy of regex patterns and false-positive rates in production use
Package facts
| License | MIT permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Aging 522 days since the last release |
| First released | |
| Downloads | 5,454,814 / month, #2,095 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
Evidence: microsoft_security_utilities_secret_masker-1.0.0b4-py3-none-any.whl
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See also drain3 · presidio-anonymizer · kingfisher-bin · pwinput · detect-secrets · bc-detect-secrets · robocorp-vault · truffleHog · regionmask · shamir-mnemonic