Protect what matters.
Prepare for the unexpected.
Keep your most important documents, recovery keys, and instructions encrypted on your device — and make them available to the people you trust when you can no longer respond.
Encrypt on Your Device
Seal critical PDFs, archives, keys, and instructions in your browser. ZeroCanary stores only encrypted ciphertext — your password and plaintext never leave your device.
Confirm Presence on Your Schedule
Reset your check-in timer every 24 hours, 30 days, or 365 days — and update your documents anytime. Includes a Cover Note password for coercion safety.
Private Release When You Cannot Respond
Once the timer expires and release is authorized, your trusted recipient decrypts the package via the Offline Recovery Kit (.html) or Recovery Link.
Built for families, founders, and legal counsel
Clear enough for a family member to recover without technical assistance. Rigorous enough for corporate key handover and legal custody.
Family Estate & Emergency Instructions
Ensure your spouse or family can recover vital documents, asset inventories, and personal instructions if something unexpected happens — without sharing sensitive access ahead of time.
Business Continuity & Key Handover
Prevent operational paralysis if a founder or principal administrator is suddenly unavailable. Hand over recovery keys, infrastructure access, and executive directives safely.
Structured Client Continuity
Provide clients with a standardized, zero-knowledge continuity vault backed by standalone Offline Recovery Kits (.html) and B2B VAT invoicing.
How your recipient receives access
1. Private Recovery & Institutional Webhook
AVAILABLE NOWHand your recipient the standalone Offline Recovery Kit (.html) or Recovery Link directly, or configure an optional Institutional HTTPS Webhook triggered upon release authorization.
2. Assisted Email Notification
PLANNED • ROADMAPZeroCanary never promises unverified silent emails. Optional Assisted Email Notification will be introduced as an explicitly verified opt-in service.
Five continuity tiers — zero user account required
1-hour check-in timer for instant testing of text directives & Offline Recovery Kit (.html).
Up to 10 active deposits, encrypted multi-file attachments (≤50 MB), and 24h–365d check-in timers.
Up to 10 active deposits, attachments (≤50 MB) + 30-day continuity grace period.
Full annual continuity pass, up to 10 active deposits, attachments (≤50 MB) & 30-day grace.
Unlimited client deposits, attachments (≤50 MB), HTTPS webhook outcalls & B2B VAT invoice.
Apple Pay, Google Pay, Visa / Mastercard, Instant Bank Transfers, and formal Law Firm B2B VAT Invoices processed via Stripe Institutional Checkout — zero user account required.
Direct non-custodial bearer pass settlement in native Bitcoin (BTC), USD Coin (USDC), and Ethereum (ETH) for principals requiring settlement without banking intermediaries.
How the protocol responds in three real-world situations.
Select a situation below to compare what appears on the local screen with what the autonomous threshold notary executes in the background.
HEARTBEAT_VERIFIED. Your countdown timer resets for your chosen period (e.g., 30 days, 3 months, or 6 months) and displays your confidential instructions.
Seal your fiduciary deposit in three steps.
All check-in intervals—from 24 hours up to 3 months, 6 months, and 12 months—are available directly below.
Cryptographic Audit Proof (Optional)
Enter your Deposit ID and Main Password to reset your timer, view your deposit, or add new documents and update instructions.
Cryptographic Receipt HMAC
For designated legal counsel or family members: once a deposit’s timer expires or a duress release is authorized, enter the Deposit Reference ID and Recipient Password (or Main Password) below to unlock the files.
Verify Standalone Document Timestamp by SHA-256
How pass expiration works without risking your deposit
A fiduciary deposit must never be cancelled early if the owner is hospitalized when their pass expires:
Select your pass tier, duration (3, 6, or 12 months), and accounting mode.
Zero-Knowledge Cryptographic Architecture
All deposits and multi-file attachments (up to 50 MB, auto-bundled in-browser) are sealed exclusively inside your browser using authenticated client-side encryption (AES-256-GCM, PBKDF2-SHA-256 at 600,000 iterations) and mutual SCRAM-SHA-256 verification. Encrypted ciphertext resides in sovereign European Union zero-knowledge custody while cryptographic SHA-256 commitments and countdown timers execute on an autonomous decentralized threshold notary. Neither the operator nor the network ever receives your passwords or plaintext files.