Blog
Compliance guides, best practices, and technical deep-dives for developers building with AI.
GDPR-Compliant AI: How to Process EU Data Safely
Learn how to use AI with European user data while staying fully GDPR compliant. Covers tokenization, EU region processing, and audit trails for DPAs.
9 min readHIPAA and AI: Protecting PHI in US Healthcare Apps
How to build AI-powered healthcare applications that protect PHI. Covers the hipaa_us policy, encryption mode, Safe Harbor de-identification, and BAA readiness.
10 min readData Residency for AI Applications
Why data residency matters for AI apps processing personal data. Covers GDPR Articles 44-49, Schrems II, and how regional API endpoints solve cross-border data transfer.
8 min readEU AI Act Compliance Checklist for Developers
A practical checklist for developers building AI applications under the EU AI Act. Covers risk classification, transparency requirements, and implementation steps.
11 min readPII Detection in Python: Regex vs. Presidio vs. Managed API
An honest comparison of three approaches to PII detection in Python: hand-rolled regex, Microsoft Presidio with spaCy, and a managed API. Includes working code, accuracy tradeoffs, and a decision framework.
10 min readHow to Protect PII in LangChain Pipelines
Add PII protection to any LangChain chain in two lines of code. Covers tokenization, RAG document transformers, compliance policies, and EU data residency with langchain-blindfold.
9 min readHow to Remove PII Before Sending Data to Your LLM
Learn how to strip personally identifiable information from prompts before sending them to OpenAI, Anthropic, or any LLM. Covers regex, NER models, and API-based tokenization with working Python and JavaScript code.
8 min readHow to Build a PII-Safe RAG Pipeline
RAG pipelines are the #1 pattern where PII leaks into LLMs. Learn how to protect personal data with two-layer privacy: ingestion-time redaction and query-time tokenization using ChromaDB, OpenAI, and Blindfold.
10 min readRAG Without Leaking Customer Data: A Practical Guide
Build a customer support RAG chatbot that never exposes personal data to your LLM provider. Covers attack surfaces, multi-turn conversations, GDPR compliance, and a production-ready architecture.
11 min readProtecting PII in LangChain RAG Pipelines
Use BlindfoldPIITransformer and blindfold_protect() to add PII protection to LangChain RAG pipelines. Covers document ingestion, retrieval chains, and compliance policy recommendations.
9 min readRole-Based Patient Data Protection in Healthcare RAG Systems
Implement role-based PII control in healthcare RAG pipelines. Doctors, nurses, billing clerks, and researchers each see only the patient data their role permits, satisfying HIPAA minimum necessary requirements.
11 min readRole-Based Candidate Privacy in HR and Recruiting RAG Systems
Implement role-based PII control in HR and recruiting RAG pipelines. HR managers, recruiters, interviewers, and hiring committees each see only the candidate data their role permits, enabling blind hiring and GDPR compliance.
12 min readRole-Based Client Data Protection in Financial RAG Pipelines
Implement role-based PII control in financial services RAG systems. Relationship managers, risk analysts, compliance officers, and external auditors each see only the client data their role permits, satisfying PCI DSS, SOX, GDPR, and MiFID II requirements.
12 min readPrivilege-Aware Document Search: Role-Based PII Control for Legal RAG
Build RAG systems for law firms where partners, associates, paralegals, and client portals each see appropriate levels of case data. Supports ethical walls, attorney-client privilege, and ABA compliance.
10 min readHow to Scan Files and Directories for Sensitive Data
Use Blindfold SDK to find PII hiding in CSV exports, JSON fixtures, config files, and documents. Examples in Python, JavaScript, Java, Go, and .NET.
6 min readLocal Mode vs Cloud API: Which PII Detection Engine Should You Use?
Compare Blindfold's two detection engines: Local Mode (regex, offline, free) and Cloud API (NLP-powered, 60+ entity types). Learn what each detects and when to use which.
5 min readHow to Prevent PII from Leaking into Your Log Files
Wrap your logger so PII is automatically redacted before it reaches disk. Examples for Python, JavaScript (Winston), Java (SLF4J), Go (slog), and .NET (ILogger) using the Blindfold SDK.
5 min readStop Leaking Customer Data to LLMs — A Developer's Guide
Every LLM API call logs your input. If it contains names, emails, or SSNs, you just sent PII to a third party. Here's a 60-second fix with working Python code — local mode included, no API key required.
8 min read