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WEEX Crypto News, 2026-04-22 12:16:02
Cardano’s Charles Hoskinson has raised concerns about Bitcoin’s adoption of the SPHINCS+ protocol for post-quantum security. His critique highlights a perceived lack of flexibility, suggesting that the chosen system focuses too narrowly on security without fostering broader functionality that could support more versatile applications in the future.
SPHINCS+ serves as a signature protocol aimed at defending against quantum computing threats. Its appeal lies in its use of simple hash functions instead of complex mathematical structures, which satisfies developers prioritizing defense. However, this simplicity comes at a cost—SPHINCS+ signatures are considerably larger than traditional ECDSA and Schnorr signatures. This increase in size can challenge Bitcoin’s scalability if widely implemented, adding weight to Hoskinson’s concerns about functionality and upgrade potential.
Bitcoin’s development ethos is recognized for its cautious nature, emphasizing stability over rapid innovation. The adoption of SPHINCS+ aligns with this philosophy, choosing simplicity and reliability over complex advancements. Bitcoin developers maintain a focus on reducing risks, considering a defensive update as a priority.
As of now, quantum computers remain unable to compromise Bitcoin’s existing cryptographic techniques. However, the discourse around post-quantum security is intensifying as blockchain platforms consider long-term protective measures. The slow pace of Bitcoin’s upgrade cycle suggests any adopted solution might persist for considerable durations—an important aspect fueling the debate between current caution versus preparation for adaptable future threats.
SPHINCS+ is a hash-based, stateless signature scheme designed for quantum resistance, unlike ECDSA and Schnorr, which are susceptible to potential future quantum computer-based attacks.
Hoskinson believes Bitcoin’s choice of SPHINCS+ is too rigid, offering limited functionality beyond security, potentially stifling broader network upgrades.
Currently, quantum computers lack the capability to break Bitcoin’s existing cryptography, but preparing for future advancements in quantum technology remains prudent.
SPHINCS+ increases transaction size, impacting network scalability, and offers minimal flexibility in terms of additional functions beyond enhanced security.
Bitcoin developers prefer conservative changes focused on stability and risk reduction, aligning with a defensive strategy rather than adopting more complex, flexible systems.
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