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Your account identifies you to the service. Your document passphrase unlocks encrypted cloud document access on a device. Signing into the same email address does not by itself unlock that device’s cloud keys.

Connect another device

Sign into the same service and account, then follow the Connect documents prompt with your existing document passphrase. Desktop sign-in opens your system browser for account approval before returning to the app. Personal devices can remember access through their protected device storage. Shared sessions keep access for that session. Explicit Lock, Forget and sign-out change access differently from simply closing a personal editor window.

Keep a recovery kit

Recovery setup provides a recovery file and a separate code. Keep both, and make sure you can obtain them without relying on the device you might need to recover. Follow the recovery dialog on a fresh signed-in client if you lose the passphrase. Resetting an account password does not replace the document passphrase or its recovery kit. Do not create replacement document keys to work around an unlock problem with existing documents.

Local copies

Cloud encryption protects cloud transfer and storage. Local EPUB files and local editing/recovery state are not an encrypted vault. Locking cloud keys does not erase local files or replace operating-system device protection.