Client-side encryption
The browser encrypts before upload. The decryption key stays in the continuation URL fragment.
Encrypted cross-device state transfer SDK
Move app state once. Resume anywhere.
Move validated web-app state to another device without user accounts or permanent cloud state storage. Built for multi-step forms, diagnostics, checklists, quote builders and configuration wizards.
One successful claim
Short TTL, atomic claim and no permanent end-user application state.
Resume, not sync
Validate, import and continue at the same step. No accounts for end users.
Why not build it again?
Cross-device state transfer looks small until it needs authenticated encryption, safe fragments, expiry, atomic one-time claim, strict validation, existing-state consent, quota and browser edge-case handling. Dermoptera Handoff packages those boundaries behind a small SDK.
Not for everything
Do not use it for authentication or session transfer, payments, banking, KYC, password sharing, continuous synchronization or safety-critical workflows.