量子计算机能打破所有加密货币吗？

量子计算机可以破解大多数当前依赖 ECDSA 或类似的前量子密码学的加密货币实现。然而，使用后量子算法（如 NIST 标准化的算法）的加密货币是专门为抵抗量子攻击而设计的，并且将保持安全。

该漏洞源于Shor的算法，该算法有效地解决了ECDSA底层的离散对数问题。 Bitcoin、Ethereum 以及大约 95% 的加密货币市值都使用容易受到此攻击的椭圆曲线加密技术的变体。

加密货币中使用的对称加密和哈希函数仅面对 Grover 的算法，该算法提供二次（而非指数）加速。 Bitcoin 挖掘和块链接中的 SHA-256 散列保留了足够的安全性和足够的位长度。直接的威胁是非对称签名方案，而不是基于哈希的组件。

并非所有加密货币都同样容易受到攻击。地址中从未花费过的资金具有受哈希函数保护的公钥，从而提供临时的额外保护。然而，任何交易都会暴露公钥，仅靠哈希保护可能不足以抵御高级量子攻击。

Quantum-resistant cryptocurrencies using NIST-standardized algorithms are designed specifically to withstand quantum attacks. Lattice-based schemes (Kyber) resist Shor's algorithm because they rely on different mathematical problems. Hash-based signatures (SPHINCS+) derive security from hash function properties without algebraic structure to exploit.

The timeline has tightened sharply. Google Quantum AI, working with the Ethereum Foundation and Stanford, showed in March 2026 that breaking ECDSA-256 needs only 1,200-1,450 logical qubits - fitting inside fewer than 500,000 physical qubits and completing in minutes, not days. Against IBM's published roadmap (Starling in 2029 at ~200 logical qubits, Blue Jay in 2033 at over 2,000 logical qubits on ~100,000 physical) and NSA CNSA 2.0 migration deadlines, Nobody knows when; published hardware roadmaps reach the needed scale between 2028 (IonQ, on paper) and 2033 (IBM Blue Jay). Harvest-now-decrypt-later attacks mean data captured today faces eventual exposure regardless. Migration to quantum-resistant alternatives should precede quantum computer development.

SynX implements Kyber-768 and SPHINCS+, so no elliptic-curve or RSA key exists for Shor's algorithm to attack, unlike legacy cryptocurrencies that need uncertain protocol upgrades.