xCredit: Credit Scoring Data Isolation

The Problem

Credit profiles concentrated at single bureaus create catastrophic breach risk. The Equifax breach exposed 147 million complete credit histories from a single point of failure.

The global credit reporting industry concentrates complete consumer credit histories at individual bureaus. Each bureau independently holds enough data to fully reconstruct a consumer's financial identity. A single breach at any bureau exposes the entire credit profile -- Social Security numbers, account histories, payment records, and inquiry logs.

Current credit infrastructure provides no mechanism for data isolation between bureaus. Each bureau is a complete, independent copy of the consumer's financial identity. This architecture means the blast radius of any breach is always 100% of the data. Encryption at rest protects against physical theft but not against compromised application layers or insider threats.

The Old Way

The PRIVATE.ME Solution

xCredit splits credit profiles across independent bureaus using XorIDA. No single bureau holds a reconstructable profile. Scoring requires threshold cooperation between bureaus with HMAC verification.

Credit profiles are split via splitProfile() into N HMAC-signed shares distributed across independent bureaus. Each bureau stores only an unintelligible share. Credit scoring operations use scoreSafely(), which collects threshold shares, verifies HMAC integrity, reconstructs the profile ephemerally, computes the score, and destroys the reconstructed data.

A breach at any single bureau exposes only shares that are information-theoretically useless without the threshold. The blast radius drops from 100% to 0%. No attacker can reconstruct a credit profile from below-threshold shares regardless of computational resources.

The New Way

How It Works

Credit scoring operates through a three-phase protocol: split-and-distribute, threshold-collect-and-verify, and ephemeral-score-and-destroy.

Use Cases

Integration

import { splitProfile, scoreSafely } from '@private.me/xcredit';

// Split credit profile across 3 bureaus (2-of-3 threshold)
const shares = await splitProfile(creditProfile, bureaus, {
  n: 3,
  k: 2
});

// Score safely: collect, verify, reconstruct, score, destroy
const result = await scoreSafely(consumerId, {
  model: 'FICO_9',
  purpose: 'mortgage_prequalification'
});
console.log(result.score); // 742 -- ephemeral, no data retained

Security Properties

Cryptographic Proof of Correctness

This ACI's computations can be cryptographically verified by xProve — so regulators, auditors, and counterparties can confirm results without re-running the computation or accessing the underlying data.

Ready to deploy xCredit?

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

Ship Proofs, Not Source

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

Use Cases