Quantum Risk Report by Coinbase

The Coinbase exchange has published its first large-scale report on risks associated with the development of quantum computing and its potential impact on the cryptocurrency industry. The document was prepared by an independent advisory board on quantum technologies and blockchain established under the exchange, and effectively sets a new agenda for the entire industry: the discussion of quantum threats is moving from the theoretical domain into the practical one.

The board includes researchers and experts from leading scientific and technological centers, including Stanford University, University of Texas at Austin, Ethereum Foundation, Eigen Labs, Bar-Ilan University, and University of California, Santa Barbara. This highlights that the report is not a marketing document, but a multidisciplinary assessment of future systemic risks.

The main conclusion sounds both calm and alarming. At the current stage, digital assets remain secure. However, in the long term, the emergence of a sufficiently powerful quantum computer could threaten the existing cryptographic model on which blockchains are built.

Particular attention in the report is paid not to network infrastructure itself, but to the user-level security. Wallets are considered the most vulnerable link. Modern digital signatures that confirm ownership of assets could, in theory, be broken with sufficient computational power. This means that the risk concerns not the protocols themselves, but the mechanism of access control to funds.

The report also emphasizes the scale of the potential problem. According to researchers, about 6.9 million bitcoins are held in addresses where key information is publicly available or where key storage structures may be vulnerable. At the same time, the Bitcoin network itself is generally considered resilient: mining algorithms and hash functions are viewed as secure even under quantum scenarios. The main risk is concentrated in transaction signatures and private key management.

A more complex situation, according to the authors, exists in networks using the Proof-of-Stake model. In such systems, validator signatures play a greater role, and therefore the attack surface is potentially broader. This makes the issue of migration to post-quantum algorithms especially relevant for modern blockchain platforms.

The industry response is already beginning to take shape. Ethereum developers have previously presented a preliminary roadmap for transitioning to post-quantum cryptography. This involves a gradual protocol-level upgrade with the implementation of new signature schemes resistant to quantum attacks.

Coinbase Chief Information Security Officer Phillip Martin described the situation directly: the current infrastructure remains safe, but the industry should not wait until the threat becomes critical. According to him, preparation must begin in advance, as the transition will be complex and lengthy.

Full summary and link to the paper:

From a technical perspective, the main challenge lies not only in developing new algorithms but also in implementing them. The National Institute of Standards and Technology has already standardized several post-quantum cryptographic schemes, but they are structurally more complex. This implies larger data sizes, increased network load, and potentially reduced transaction efficiency.

An additional challenge is related to the scale of decentralized systems. Migrating millions of addresses and users to new standards requires coordination that, unlike in traditional finance, is not centralized but distributed among participants. This makes the upgrade process significantly more complex and politically sensitive.

Some projects have already begun adapting. Among them are Solana, Algorand, and Aptos, which are considering or testing post-quantum solutions. However, the industry as a whole is still at an early stage of preparation.

The report also raises a controversial issue of “lost” or inactive wallets. These are funds whose keys are lost or belong to inactive users. In the context of a quantum transition, a dilemma arises: what to do with such assets. Possible options range from freezing to complete removal from circulation, which could trigger serious debates within blockchain communities.

The advisory board recommends not delaying decisions and establishing transparent migration rules in advance. In essence, this is not only about technology but also about a new form of digital governance of property rights.

For its part, Coinbase states that it is working on infrastructure that will allow relatively fast implementation of new cryptographic standards and adaptation of the ecosystem to future changes.

Thus, the published report can be seen as an early signal of the beginning of a new technological cycle in the crypto industry – one in which the key factor is not only blockchain scalability, but also their ability to survive in the era of quantum computing.