Advancements in quantum computer technology have become a serious alarm bell in the crypto world. Considering recent efforts by Google, a real threat is beginning to emerge for blockchains like Ethereum and similar networks.

The main issue is that elliptic curve systems like secp256k1 are becoming increasingly vulnerable to quantum algorithms. Although hash functions are not directly targeted yet, there are deeper risks involved. Ethereum's account signatures, administrative privileges, pre-compiled contracts, and consensus mechanisms are all within the scope of these threats.

What is particularly concerning are accounts with public keys exposed publicly, and structures based on BLS or KZG systems. These systems have almost no defense against quantum computers. Even worse, once these keys are exposed, we cannot recover them.

At this point, post-quantum cryptography solutions recommended by NIST come into play. Especially lattice-based cryptography. However, caution is needed here because the effectiveness of these solutions in real-world scenarios is not yet fully known.

This situation serves as a warning for stakeholders of Ethereum and other blockchain projects. As quantum computer technology rapidly advances, we must be prepared. In the coming years, this topic will likely become more prominent and finding solutions will become essential. For now, staying informed and closely monitoring developments is the most prudent course of action.