xBureau: Cross-Border Tax Reporting Privacy

The Problem

CRS 2.0 and FATCA require financial institutions to report account holder data across jurisdictions, but centralized reporting creates massive PII exposure risks.

Cross-border tax reporting involves sharing account balances, income, and taxpayer identification across dozens of jurisdictions. Each data exchange creates a potential breach vector.

The aggregate data flowing between 100+ jurisdictions contains the financial details of billions of accounts. A single intermediary breach exposes an entire country’s taxpayer records.

The Old Way

The PRIVATE.ME Solution

xBureau enables cross-border tax reporting where aggregate compliance data is computed on XorIDA shares via xCompute. Individual account details are never shared in the clear.

Financial institutions split account data into XorIDA shares. Tax compliance computations (aggregate balances, threshold checks, income categorization) run on shares via xCompute. Only aggregate verdicts cross borders.

Each reporting institution is authenticated via DID identity. HMAC-chained audit trails provide tamper-evident compliance records. xRedact strips unnecessary PII before any computation.

The New Way

How It Works

xBureau combines xCompute aggregation with xRedact PII minimization and xLink M2M authentication for privacy-preserving cross-border tax reporting.

Use Cases

⚡ Fast Onboarding

Traditional credit bureau setup requires manual custodian configuration, storage backend provisioning, and DID generation. xBureau collapses this to 15 seconds with zero-click accept, 90 seconds with one-line CLI, and 10 minutes with deploy buttons.

Speed Tiers

Quick Start: Zero-Click (15 seconds)

# 1. Set invite code (from bureau network onboarding email)
export XBUREAU_INVITE_CODE=XBU-abc123

# 2. Create your first bureau instance (auto-accepts invite)

import { createCreditBureau } from '@private.me/xbureau';

const bureau = createCreditBureau(storage); // Auto-initializes from env

CLI Setup (90 seconds)

# Install CLI globally
npm install -g @private.me/xbureau

# Initialize (generates DID, configures custodians)
xbureau init

# Store your first credit report
xbureau store \
  --report ./sample-report.json \
  --threshold 2 \
  --total-shares 3

# Output:
# ✅ Report split (2-of-3)
# ✅ Shares distributed to custodians
# ✅ Encrypted at rest (AES-256-GCM)
# ✅ Report ID: report-abc123

Deploy Button Setup (10 minutes)

Click one button to provision storage backends + custodian infrastructure on Vercel/Netlify/Railway.

Integration

import { TaxReporter } from '@private.me/xbureau';

const reporter = await TaxReporter.create({
  institutionDid: bankDid,
  jurisdictions: ['US', 'UK', 'DE'],
  threshold: { k: 2, n: 3 }
});
const report = await reporter.generateReport(accounts);

Security Properties

Verifiable Data Protection

Every operation in this ACI produces a verifiable audit trail via xProve. HMAC-chained integrity proofs let auditors confirm that data was split, stored, and reconstructed correctly — without accessing the data itself.

Ready to deploy xBureau?

Talk to Ren, our AI sales engineer, or book a live demo with our team.

Ship Proofs, Not Source

xBureau generates cryptographic proofs of correct execution without exposing proprietary algorithms. Verify integrity using zero-knowledge proofs — no source code required.

Use Cases