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Security & trust

Compliance shouldn't create new exposure

The whole point of a deletion law is to reduce the personal data sloshing around. A tool that answers it by copying consumer lists everywhere defeats the purpose. DROP Privacy is engineered so the act of complying is itself low-risk.

No PII custody

Matching runs on salted, normalized hashes. Raw names, emails, phones, and VINs never leave your database — only hashes, statuses, and metadata cross any boundary.

On-premise agent (Model C)

Run the engine inside your own perimeter. The agent indexes and matches locally and reports only non-PII results to the coordination plane — ideal when data can't move.

Tamper-evident audit

Every state-changing and administrative action is written to a hash-chained log — each row signed against the previous (row_chk = sha256(prev | …)). Records can't be quietly rewritten.

Database-per-tenant

Each broker's data lives in its own isolated database — never a shared schema. One tenant can't reach another's records, by construction.

Centralized RBAC

Tenant isolation and role-based access are enforced centrally in middleware — not re-implemented per controller — and every impersonation or admin action is itself audited.

Secrets & work dir off the web root

API keys, certificates, and the engine's working directory live outside the document root. The web server only ever exposes public/.

Defense in depth

The boundary only carries hashes

The single most important property: the data that crosses between your systems and the coordination plane is never raw PII.

  • Parameterized SQL only — no string-built queries against your data.
  • Gated, path-validated, audited downloads — exports can't be used to exfiltrate.
  • Secrets via environment or secret store — never committed to version control.
  • Retention by design — deletion hashes are kept to forward-suppress, satisfying the ongoing duty.
Only hashes, statuses, and audit metadata cross the boundary; consumer PII stays inside the broker's perimeter.

Bring your security team.

We'll walk through the data-flow boundary, the audit chain, and the on-premise deployment option in detail. Security questions or responsible disclosure: security@dropprivacy.com.