The long-term security of public blockchains strictly depends on the hardness assumptions of the underlying digital signature schemes. In the current scenario, most deployed cryptocurrencies and blockchain platforms rely on elliptic-curve cryptography, which is vulnerable to quantum attacks due to Shor's algorithm. Therefore, it is important to understand how post-quantum (PQ) digital signatures behave when integrated into real blockchain systems. This report presents a blockchain prototype that supports multiple quantum-secure signature algorithms, focusing on CRYSTALS-Dilithium, Falcon and Hawk as lattice-based schemes. This report also describes the design of the prototype and discusses the performance metrics, which include key generation, signing, verification times, key sizes and signature sizes. This report covers the problem, background, and experimental methodology, also providing a detailed comparison of quantum-secure signatures in a blockchain context and extending the analysis to schemes such as HAETAE.

翻译：公共区块链的长期安全性严格依赖于底层数字签名方案的困难性假设。在当前场景下，大多数已部署的加密货币和区块链平台依赖于椭圆曲线密码学，该密码学由于Shor算法的存在而易受量子攻击。因此，理解后量子（PQ）数字签名在集成到实际区块链系统中时的行为至关重要。本报告提出了一个支持多种量子安全签名算法的区块链原型，重点关注基于格的方案CRYSTALS-Dilithium、Falcon和Hawk。报告还描述了原型的设计，并讨论了性能指标，包括密钥生成、签名、验证时间、密钥大小和签名大小。报告涵盖了问题、背景和实验方法，还提供了区块链背景下量子安全签名的详细比较，并将分析扩展到如HAETAE等方案。