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So Casa have 2/3 keys?

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Of course not, that would make it custodial.

The mobile keys are only held by the client and their designated recipient.

For the ultra paranoid, we offer the option to use a second hardware key in lieu of a mobile key.

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welcome to SN, sir!

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What happens if you sign for the the paid plan to use the multi-sig inheritance, but then stop paying one year. How do you export or recover the custody?

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will Casa post more on this platform?

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Does the inheritance product involve a closed source Casa mobile phone wallet?

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This is a very good point.

Mr @lopp, as a potential customer (I like the product), is it really necessary for me to sign up to draconian Google or Apple T&Cs / accounts to download your app?

Why no repo, or at least an APK download?

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Yes, it is one of the biggest weaknesses in Casa's design: too much trust is required for the Casa app, particularly the mobile key generated by the Casa app.

What's ironic is that they've somehow turned this weakness into a feature: leveraging the mobile key for an "easy-to-use" inheritance protocol. An aspect that used to require trust, now would require even more trust. What Casa should have done, is to address the weakness of the mobile key head-on, instead of building more features on top of it.

IMO the design is not safe for long-term savings.

I wrote a full review of Casa's inheritance protocol here: https://nunchuk.io/blog/casa

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Huh, I recognize the headline is using the same terminology as the post:

Casa Inheritance is available worldwide and accessible for every investor.

Strange to overload that term (Casa the company has its own investors) instead of saying the feature is available to all paid members/clients/users. Despite the needlessly confusing language, it’s cool they’re offering inheritance more widely now.

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There are other inheritance solutions from people who don't embrace Efereum for the fiat profits.

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*with a $250/year plan, so only paid investors.

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Casa's inheritance protocol has many similarities with Nunchuk's, with some key differences.

I wrote a review / comparison here, for anyone who's interested: https://nunchuk.io/blog/casa

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I think the fundamental use case, and who the users of this type of product would be, is largely missed in this discussion thread, so far.

These third-party, collaborative, multi-sig solutions, that feature Inheritance plans (like Casa, Nunchuk, Unchained, etc), are primarily for less technically-savvy Bitcoin HODLers (unlike those on Stacker News who largely understand Bitcoin).

While the primary HODLer themselves may be able to intelligently protect and access their Bitcoin, their heirs may be clueless. So instead of risking loss, these third-parties offer a way to pass on the Bitcoin via solutions that are very easy to execute by the less tech-savvy heirs.

And, they are 2-of-3 so the custody partner never relinquishes control to the third party.

While nothing is perfect, it seems these companies understand their customers want to mitigate counter-party risk, while also giving their heirs an easy way to access their Bitcoin upon their demise.

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These announcements always have to explain what happens when the company goes out of business imho.

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In general, I'm excited to see more inheritance options. The problem comes up a lot on here.

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The idea is good but I won't do it for security issues. You can affirm, reaffirm but sharing private keys through a third party app isn't trustworthy. Supposing I die and have done Casa already, my inheritance would be delivered to my heir through CaSa is the medium. Fine what would you be asking them to bring? The death certificate? Suppose someone forges it before I die, you wouldn't grant access.

I have a diary and and everything's written in it. If I die my dear ones will have what I have.