How to Safely Store Bitcoin? A Brief Discussion on 'Brain Wallet'

Examples.

Passphrase a, I love Bitcoin.

Passphrase b, I am a holder.

Secret phrase, let's write this is my first private key.

How to do it?

We hash passphrase a with SHA-256 to get hash value c.

We hash passphrase b with SHA-256 to get hash value d.

Then c + secret phrase (here I set the secret phrase as: this is my first private key) + d, and then hash it to get a 256-bit number to be used as the private key.

By doing this, it leads to the entropy of the private key being formed, meaning the seed information for the private key is also random, two random numbers plus a secret phrase, this way it prevents the possibility of brute-force attacks.

At the same time, due to the presence of the secret phrase, we can change the first one to the second, third, fourth, and so on infinitely, allowing us to generate multiple private keys using the same scheme.

Wasn't Satoshi's original intention for Bitcoin just to change addresses when transferring coins?

Therefore, we need many addresses, which can be obtained by changing numbers to get infinite addresses.

At this point, you only need to remember two passphrases and one secret phrase.

What kind of passphrases and secret phrases to use? Just let your imagination run wild, as long as you can remember them.

If you want to go further, you can use more complex passphrases.

For example, mastering a few phrases inside Bitcoin, or different phrases from different books, and then noting down the book version number, page number, line number, and writing them on paper.

What are the benefits of this?

It is that this piece of paper is not afraid of being seen by others; even if they see it, they won't know what it's for. Even if they know what it is for, they still won't know your secret phrase and still won't be able to deduce your private key.

So, you only need to remember the secret phrase, and the rest of the passphrase information can be stored in different places.

Of course, you can also use more complex passphrases and rules.

In short, I wish we can all slowly become rich in a safe environment.

Finally, if you have better ideas or methods, feel free to leave a message!! #休眠地址接连甦醒 #以太坊Layer2总锁仓量上涨 #山寨季要来了吗？ BabyMarvin f9c7