# Dermoptera Handoff > Encrypted cross-device state transfer SDK for validated web-app state. - Documentation: https://dermoptera.work/docs/ - Quickstart: https://dermoptera.work/quickstart/ - OpenAPI 3.1: https://dermoptera.work/openapi.json - Error model: https://dermoptera.work/docs/errors/ - Security: https://dermoptera.work/security/ - Privacy: https://dermoptera.work/privacy/ Do not use for authentication/session transfer, payments, banking, KYC, passwords, dedicated secret sharing, continuous sync or safety-critical workflows.