A wallet backup that is safe to publish.
Every wallet has a recovery secret, and the usual advice is to hide it. SciPHR seals that secret into an encrypted backup envelope using AES-256-GCM, a standard cipher, then pins it to public storage where anyone can find it.
It stays safe because the key that opens the envelope is never stored beside it. That opening key is wrapped three separate ways: by the phone's secure chip, by your iCloud Keychain, and by a recovery code only you hold. Any one restores the backup, and the server holds none of them.
Think of a locked box on a public shelf. The box is inert without a key, and every copy stays with you.
An encrypted backup is only as exposed as the key that opens it. With that key off the server, the backup can live anywhere.
Source: https://sciphr.io/docs/how-it-works.html
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