Only 10K Bitcoin at quantum risk and worth attacking, CoinShares claims

## Quantum Apocalypse Averted? CoinShares Says Bitcoin's Vulnerability Overblown The looming threat of quantum computing has haunted the crypto space for years, with many fearing its potential to shatter the cryptographic foundations upon which Bitcoin is built. But a new analysis suggests the doomsday scenarios might be significantly overblown. According to a recent report, the actual amount of Bitcoin truly vulnerable to near-term quantum attacks is far smaller than previously imagined, offering a glimmer of hope for long-term Bitcoin holders. The core concern revolves around Bitcoin's reliance on Elliptic Curve Cryptography (ECC), specifically the ECDSA algorithm, for securing transactions. ECDSA generates public and private key pairs. The public key is derived from the private key, and it's used to create a Bitcoin address. The private key, kept secret by the owner, is used to digitally sign transactions, proving ownership and authorizing the transfer of funds. Quantum computers, leveraging the principles of quantum mechanics, possess the potential to solve mathematical problems that are intractable for even the most powerful classical computers. One such problem is breaking ECC. Shor's algorithm, a quantum algorithm, could theoretically derive a private key from a public key, effectively allowing an attacker to steal Bitcoin from any address where the public key has been exposed. This is where the nuance lies. Bitcoin addresses are not inherently tied to a public key until a transaction is initiated from that address. When sending Bitcoin, the transaction includes the public key used to generate the sending address. This is necessary for verifying the signature. However, until a transaction is made, the public key remains hidden. This offers a crucial layer of defense against quantum attacks. The report highlights that the vast majority of Bitcoin is stored in addresses where the public key has never been revealed on the blockchain. These are significantly less vulnerable to a quantum attack. The analysis estimates that only a small fraction of the total Bitcoin supply, approximately 10,000 BTC, currently resides in addresses where the public key is exposed and therefore at immediate risk. While 10,000 BTC is still a significant sum, the report further argues that even compromising these vulnerable addresses wouldn't be a trivial task. The computational power required to run Shor's algorithm on a scale large enough to break Bitcoin's ECC is still years, if not decades, away. Moreover, the report claims that even with a sufficiently powerful quantum computer, cracking each vulnerable address could take an estimated millennium. This is due to the computational complexity involved in running the algorithm and the need to repeat the process for each individual address. This doesn't mean complacency is warranted. The threat of quantum computing is real and ever-evolving. However, it does provide a more realistic perspective on the immediate risks. It also buys time for the Bitcoin community to implement quantum-resistant cryptographic solutions. Several potential solutions are being explored, including transitioning to post-quantum cryptography (PQC) algorithms. These algorithms are designed to be resistant to attacks from both classical and quantum computers. Another approach involves using hash-based signatures, which are considered to be quantum-resistant. The Bitcoin network could potentially implement these solutions through a soft fork or a hard fork upgrade. A soft fork would be backward-compatible, meaning that nodes that haven't upgraded would still be able to validate transactions. A hard fork, on the other hand, would require all nodes to upgrade to the new ruleset. Ultimately, the report suggests that the quantum threat to Bitcoin is manageable, and the community has time to prepare and implement appropriate defenses. While the potential for a quantum apocalypse remains a valid concern, it appears less like an imminent catastrophe and more like a long-term challenge that can be addressed through careful planning and technological innovation. The key takeaway is that the narrative of Bitcoin's inevitable demise at the hands of quantum computers may be significantly overblown, allowing for a more nuanced and optimistic outlook on the future of the world's leading cryptocurrency.