LLM Data Masking & AI LGPD/GDPR Compliance
Prevent sensitive PII, financial identifiers, and proprietary secrets from leaking to external AI providers. ContextMiner is an Enterprise AI Proxy that performs deterministic LLM Data Masking on local CPU in under 5ms—with automatic de-masking on response streams.
See Reversible LLM Data Masking in Action
Select a regulatory jurisdiction below to inspect how ContextMiner anonymizes sensitive identifiers before upstream transmission and restores them on the return stream.
LGPD (Brazil • CPF / CNPJ / Email)
Regulatory Scope: Lei Geral de Proteção de Dados (Art. 46) (Brazil / LATAM)
Customer Ticket #8841:
Please verify invoice settlement for company CNPJ 12.345.678/0001-95.
Legal representative: Marcos Silva (CPF: 418.920.114-09).
Send confirmation receipt to [email protected].Intercepted inside your perimeter before hitting external APIs.
Customer Ticket #8841:
Please verify invoice settlement for company CNPJ {{TKN_CNPJ_9A4F12C0}}.
Legal representative: {{TKN_PERSON_7B2E11A4}} (CPF: {{TKN_CPF_3D8C90E1}}).
Send confirmation receipt to {{TKN_EMAIL_5F1A88B2}}.OpenAI / Anthropic / Gemini only receives irreversible cryptographic placeholders.
Draft Reply for Ticket #8841:
Hello Marcos Silva, we confirmed settlement for CNPJ 12.345.678/0001-95 (CPF 418.920.114-09) and dispatched the receipt to [email protected].Original entities restored seamlessly in the streaming response.
Why Security Teams Choose ContextMiner as Their Enterprise AI Proxy
Deterministic regex + local Compromise NLP ensures high-recall PII redaction without GPU overhead or third-party data processors.
Pre-Built LGPD, GDPR, HIPAA & CCPA Detectors
Out-of-the-box deterministic validators with checksum verification for Brazilian CPF & CNPJ, US SSN & Medicare MBI, European IBAN & Passport numbers, UK NIN, 13–16 digit Luhn credit cards, IPv4/IPv6/MAC addresses, and international phone numbers.
ReDoS-Safe Custom Regex Rules
Every enterprise has proprietary identifiers—policy numbers, patient chart IDs, or internal project codenames. Define custom masking patterns guarded by safe-regex2 to guarantee zero catastrophic backtracking.
IDE & Dev Mode Smart Bypass
When engineers use Cursor, Cline, or VS Code, aggressive IP masking can break local debugging. ContextMiner's IDE & Dev Mode automatically whitelists loopback addresses (127.0.0.1, localhost) and mock test fixtures while still compressing token bloat.
AES-256-GCM Encrypted BYOK Routing
Route sanitized prompts to OpenAI, Anthropic, Google Gemini, DeepSeek, Groq, Mistral, OpenRouter, or self-hosted vLLM/Ollama endpoints using a single OpenAI-compatible base URL.
LLM Data Masking & AI LGPD/GDPR Compliance Questions
How does ContextMiner enforce AI LGPD/GDPR Compliance as an Enterprise AI Proxy?
ContextMiner intercepts prompts in memory before any payload leaves your infrastructure. It runs deterministic regex validators and local Compromise NLP to replace personal identifiers (CPF, CNPJ, SSN, IBAN, credit cards, emails, phone numbers, and names) with SHA-256 hashed vault tokens ({{TKN_...}}). Upstream LLM providers never see or log raw customer PII.
How do Reversible Vault Tokens (CCR) restore masked data in LLM responses?
When an upstream LLM generates a response referencing a vault token such as {{TKN_CPF_3D8C90E1}}, ContextMiner’s Cross-Context Restoration (CCR) engine swaps the placeholder back with the original value in real time—including across Server-Sent Events (SSE) streaming chunks—before delivering the response to your application.
Are raw prompts or PII ever written to disk or persistent databases?
Never. ContextMiner enforces a strict Zero-Egress and Zero-Retention architecture. Ephemeral token vaults exist strictly in volatile memory for the lifecycle of the active request/session and are never logged to disk or used for model training.
Can we define custom LLM Data Masking rules for internal employee IDs or contract codes?
Yes. Enterprise plans include the Custom Regex Zero-Egress Vault. You can define up to 50 custom regex rules validated automatically by safe-regex2 against catastrophic backtracking (ReDoS), ensuring sub-5ms proxy execution.
Want to Cut Your Monthly LLM Bill by 15% to 80%?
See how Cheerio HTML DOM stripping and BM25 Context Window Management compress prompts alongside PII masking.