My first bitcoin-related project: brainseed

I'm bracing to be flamed for this one!

I have released my first Bitcoin-related project, called brainseed. It is a tool to generate a BIP-39 compatible seed phase, deterministically, from a passphrase.

I know what you're probably thinking: this is a truly terrible idea, and you may be right. There are potential issues with this approach, most specifically the possibility of rainbow attacks. However, I do believe there are situations where this approach may be useful, as I explain in more detail in the README, and simple ways to mitigate rainbow table-based attacks.

The motivation for me was to have a tool to be able to create a brain wallet which I could memorize in a very quick hurry with little danger of forgetting any words.

It works very simply: take a passphrase, run a normalization pattern on it, hash it some number of times, and use the hashed result as entropy for mnemonic generation. It's a terminal application and the code is short, so feel free to audit it yourself.

I would label this as experimental, so the algorithm may change based on feedback, or I may hide the repository in shame if I am totally destroyed for this harebrained idea.