No… but one can copy paste passphrase to label (obviously weakening security model).
No, of course not… Superbacked license used to encrypt blocks can be used by estate administrator to decrypt blocks.
We recommend including Superbacked license code and website in will alongside other executing instructions.
But what happens if Superbacked, Inc. has gone out of business?
Superbacked is an Electron app therefore, even though its source code is proprietary, it can be audited (watch episode).
Also, Blockcrypt (used to encrypt secrets) is open source.
Choosing the right hardware to run Superbacked depends on use case.
If secret is present or entered on computer (one’s password manager passphrase for example), one can use Superbacked on that computer to back up secret.
If secret is not present or entered on computer (one’s signing device mnemonic for example), one should NEVER use Superbacked on computer that isn’t air-gapped and one should ALWAYS use computer that one can secure-erase (Apple silicon Mac) or that is amnesic by design (computer running Tails).
For sensitive use cases, when using Apple silicon Mac, we recommend factory-resetting computer once done using Superbacked given blocks sent to printer via CUPS are written to disk (among other digital forensics issues).
Given Superbacked is designed to run offline on air-gapped computers, there is no automatic update mechanism in place.
That said, one can download latest release using download links sent when app was purchased.
Superbacked uses Electron’s desktopCapturer module to allow users to switch from camera to screen capture (using gear icon) to scan QR codes displayed on other apps or websites.
This optional feature is very useful to backup two-factor authentication TOTP secrets displayed as QR codes.
Audio is never captured even though permission prompt mentions audio.
Superbacked is the result of 2 years of research and development (most of which has been contributed to public domain through privacy guides and YouTube episodes) and 6 months of full-time product and software development.
Product and software development is very expensive and, given app solves a niche problem, it is very likely that sales will never cover expenses.
Licenses are also perpetual (one-time payment vs subscription) and include version updates.