• Passwords are hashed with Argon2id. Passkeys (WebAuthn) are supported for sign-in.
• TLS on all web and API connections, with certificates issued by Let's Encrypt via our proxy.
• Stored credentials (OAuth tokens, DKIM signing keys) are encrypted at rest with AES-256-GCM using a server-held key.
• Nightly database backups are copied off-box, with a weekly automated restore test.
• Dependency audits and secret scanning run in CI on every change.
• Access to production systems is by passkey or SSH key. A formal access policy will be published before launch.
• Hosting: Vultr cloud servers in the United States (Chicago). No other hosting provider is used.