Quote from: Pmalek on July 16, 2025, 07:55:57 AM

Phase B
- A deadline will be announced after which it won't be possible to spend and sign using legacy ECDSA/Schnorr signatures.
- This requires a consensus rule change, where nodes will reject the old signature formats.
- Quantum-vulnerable UTXOs become unspendable.
- The recommended deadline is around 5 years after the activation of Phase A.

The moment i see Jameson Lopp as one of the BIP author, i'm not surprised about details of the phase B. After all, he already wrote blog post Against Allowing Quantum Recovery of Bitcoin.

Quote from: HeRetiK on July 18, 2025, 11:10:48 AM

Quote from: Amph on July 18, 2025, 10:35:41 AM

How satoshi bitcoin are at risk if he never spent them? I thought that u are at quantum risk if you spend your coins, maybe im missing something

The quantum risk is that it could become viable to derive the private key of an address from its public key. Whereas current address formats hash the public key and only expose it once a transaction has been made, the earliest Bitcoin addresses use a format that exposes the public key from the get-go (P2PK).

In addition, older version of Bitcoin Core (it was called "Bitcoin" back then) was programmed to use P2PK to receive mining reward.