[ExI] DIY Quantum Protection for Bitcoin

[Stuart LaForge]

Ok, so I think I have come up with a simple low technology method of 
safeguarding bitcoin against Quantum computing algorithms like Shor's.

First you need to but 2 hardware cold wallets (e.g. Trezor, Ledger, 
etc.) Create a seed phrase to generate a public key with one of them and 
send your BTC to it.

When you want to spend or transfer bitcoin, you set up (or reset) a seed 
phrase on your second wallet. Spend whatever bitcoin you need to and 
then transfer the remaining balance to the second wallet. When you 
spend/send bitcoin, the public key of the sending wallet gets exposed on 
the blockchain in a way that a quantum computer could use it to crack 
the private key for the spending wallet, so the idea is to empty that 
wallet completely. The public key of the receiving wallet is kept secret 
because it does not show up anywhere during the transaction. The only 
private key that a quantum computer could derive would be for the empty 
wallet that you no longer use.

Then when you want to spend/send money from your second wallet, factory 
reset the original wallet and create a new seed phrase for it to 
generate a novel public. Spend your bitcoin from the second wallet and 
immediately send the remaining balance to the, now reset 1st wallet that 
has a brand new seed phrase / public key that has never been exposed on 
the blockchain and cannot be used to hack your private key.

Then, when you want to perform another transaction, rinse and repeat. 
Always resetting and reseeding the unused wallet to get a fresh public 
key before use. With two hardware wallets, you should be able to keep 
this up indefinitely. It is a little bit of a hassle, but from what I 
understand of the bitcoin protocol, it should keep your bitcoins safe 
from quantum computing algorithms with existing technology. Let me know 
if you find a weakness in this scheme.

Stuart LaForge