I recommend reading about Shamir Secret Sharing. You could have a system setup such that (for example) you give 16 friends each a code and 9 of your 16 trusted

I recommend reading about Shamir Secret Sharing. You could have a system setup such that (for example) you give 16 friends each a code and 9 of your 16 trusted friends all have to work together in order to get the original secret.