Post
Topic
Board Development & Technical Discussion
Merits 1 from 1 user
Re: Blockchain with password support - Is it possible?
by
ETFbitcoin
on 23/02/2018, 10:04:47 UTC
⭐ Merited by Cacingkemi (1)
While it's not same with what you mentioned, it's possible if you use OP_RETURN function.

You need use BIP38 to encrypt your private and add your encrypted private key to a transaction with OP_RETURN, even though OP_RETURN function isn't supposed to store any data besides transaction/P2SH for features such as multi-sig. Also, it's risky to expose your encrypted private key, even if you encrypt it with strong passphrase.
You also need to remember the transaction ID and the process isn't user friendly.

If you really wish to do that, there are some guides/info that could help you :
https://en.bitcoin.it/wiki/OP_RETURN
https://bitcointalk.org/index.php?topic=453086.0
https://bitcoin.stackexchange.com/questions/36478/how-can-i-search-for-op-return-data
https://bitcoin.stackexchange.com/questions/25224/what-is-a-step-by-step-way-to-insert-data-in-op-return/38641

I don't recommend this method, keep your bitcoin wallet/private key/recovery seed safe with backup is better. Also, CMIIW.