What is the safest physical to store a private key only to be accessed after death?

Assume that my friend would like to encrypt his Bitcoin private key(s) and safely store them in a secret location. This located would only be identified to heirs after death in his will. Should he put the key:

  • In a safety deposit box
  • Buried in a weatherrpoof container somewhere on my property?
  • In the possession of my attorney?
  • Somewhere else

Please answer the same question above for my encryption key which I would of course store separately.

As an alternative would a mult-sig solution be helpful? If so how would you design it?

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How to store transactional information on the blockchain

I have an operational process that involves several sub processes. I am currently maintaining an audit trail of the entire process.

For (successfully) completed processes, I want to record the successful transaction (along with all relevant details) on the blockchain, for public consumption.

What is the ‘best practise’ way of storing data on the blockchain? – and what (if any), are the data size limitations (and how to workaround data size restrictions?)

Recent Questions – Bitcoin Stack Exchange

How Coinbase Built a Secure Cloud Infrastructure to Store Bitcoin

When bitcoin exchange Coinbase launched two and a half years ago, Heroku, a simple hosting platform, provided the right solution, said Brian Armstrong, Coinbase co-founder, writing in Medium. Heroku provided a more battle-tested solution than anything the founders could create on their own. But the founders realized that they had to build the next version of […]

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