ニュース

Zcash faces the same long-term cryptographic pressures as other blockchain networks, but its design gives it a distinct position in the wider quantum-risk landscape. Quantum computing threatens systems that expose public keys or rely heavily on elliptic-curve assumptions, and many blockchains fall into this category. Zcash’s shielded architecture reduces this exposure by keeping key transactional details off-chain, which limits how much a quantum adversary could reconstruct from historical data. Even so, Zcash is not immune: components such as signatures, proof verification, and note encryption still depend on pre-quantum primitives that could eventually be broken. Developers are addressing these weaknesses through projects like Tachyon, which removes secret-sharing methods vulnerable to harvest-now-decrypt-later attacks, and by researching post-quantum alternatives for proofs and key exchange. Complementing this work is “quantum recoverability,” a mechanism intended to let users re-secure their funds under stronger cryptographic conditions if quantum threats arrive unexpectedly early. Together, these efforts illustrate a deliberate, staged approach to quantum preparedness, positioning Zcash ahead of many networks while acknowledging that substantial work remains to reach full post-quantum security.