Due to the rapid advancements in network technology,blockchain is being employed for distributed data storage.In the Internet of Things(IoT)scenario,different participants manage multiple blockchains located in differ...Due to the rapid advancements in network technology,blockchain is being employed for distributed data storage.In the Internet of Things(IoT)scenario,different participants manage multiple blockchains located in different trust domains,which has resulted in the extensive development of cross-domain authentication techniques.However,the emergence of many attackers equipped with quantum computers has the potential to launch quantum computing attacks against cross-domain authentication schemes based on traditional cryptography,posing a significant security threat.In response to the aforementioned challenges,our paper demonstrates a post-quantum cross-domain identity authentication scheme to negotiate the session key used in the cross-chain asset exchange process.Firstly,our paper designs the hiding and recovery process of user identity index based on lattice cryptography and introduces the identity-based signature from lattice to construct a post-quantum cross-domain authentication scheme.Secondly,our paper utilizes the hashed time-locked contract to achieves the cross-chain asset exchange of blockchain nodes in different trust domains.Furthermore,the security analysis reduces the security of the identity index and signature to Learning With Errors(LWE)and Short Integer Solution(SIS)assumption,respectively,indicating that our scheme has post-quantum security.Last but not least,through comparison analysis,we display that our scheme is efficient compared with the cross-domain authentication scheme based on traditional cryptography.展开更多
区块链是近年来炙手可热的技术话题之一,与其相关的研究理论正在不断丰富。然而,距离区块链技术落地仍面临着吞吐量小、处理效率低的关键问题。针对该问题,跨链技术作为一种有潜力,同时具备扩大吞吐量处理能力、提升处理效率的区块链技...区块链是近年来炙手可热的技术话题之一,与其相关的研究理论正在不断丰富。然而,距离区块链技术落地仍面临着吞吐量小、处理效率低的关键问题。针对该问题,跨链技术作为一种有潜力,同时具备扩大吞吐量处理能力、提升处理效率的区块链技术而被广泛关注。文中给出了一种基于改进哈希时间锁的跨链资产交互协议(A Novel Hash-Time-Lock-Contract Based Cross-Chain Token Swap Mechanism,NCASP),创造性地为Fabric区块链引入账户体系,融合智能合约技术实现了在以太坊和Fabric联盟链网络之间的安全无缝资产交换。NCASP协议在每笔HTLC(Hash Time Lock Contract)转账中设置了不同的中间账户进行资产托管和转移,并在交易完成后及时销毁,使得在原有跨链交易速率不变的同时,保证了交易的安全性。通过对协议进行仿真模拟表明,该协议适用于以Fabric为代表的联盟链与比特币以及以以太坊为代表的公链,无需第三方区块链介入,即可实现高效安全的跨链资产交换,且在交易效率上比BSN(Blockchain Service Network)的跨链方案节省了约26.8%。改进的协议扩展了传统HTLC跨链资产方案的使用场景,使不同用户间的资产交换兼顾原子性、公平性以及透明性的特点。展开更多
基金This work was supported by the Defense Industrial Technology Development Program(Grant No.JCKY2021208B036).
文摘Due to the rapid advancements in network technology,blockchain is being employed for distributed data storage.In the Internet of Things(IoT)scenario,different participants manage multiple blockchains located in different trust domains,which has resulted in the extensive development of cross-domain authentication techniques.However,the emergence of many attackers equipped with quantum computers has the potential to launch quantum computing attacks against cross-domain authentication schemes based on traditional cryptography,posing a significant security threat.In response to the aforementioned challenges,our paper demonstrates a post-quantum cross-domain identity authentication scheme to negotiate the session key used in the cross-chain asset exchange process.Firstly,our paper designs the hiding and recovery process of user identity index based on lattice cryptography and introduces the identity-based signature from lattice to construct a post-quantum cross-domain authentication scheme.Secondly,our paper utilizes the hashed time-locked contract to achieves the cross-chain asset exchange of blockchain nodes in different trust domains.Furthermore,the security analysis reduces the security of the identity index and signature to Learning With Errors(LWE)and Short Integer Solution(SIS)assumption,respectively,indicating that our scheme has post-quantum security.Last but not least,through comparison analysis,we display that our scheme is efficient compared with the cross-domain authentication scheme based on traditional cryptography.
文摘区块链是近年来炙手可热的技术话题之一,与其相关的研究理论正在不断丰富。然而,距离区块链技术落地仍面临着吞吐量小、处理效率低的关键问题。针对该问题,跨链技术作为一种有潜力,同时具备扩大吞吐量处理能力、提升处理效率的区块链技术而被广泛关注。文中给出了一种基于改进哈希时间锁的跨链资产交互协议(A Novel Hash-Time-Lock-Contract Based Cross-Chain Token Swap Mechanism,NCASP),创造性地为Fabric区块链引入账户体系,融合智能合约技术实现了在以太坊和Fabric联盟链网络之间的安全无缝资产交换。NCASP协议在每笔HTLC(Hash Time Lock Contract)转账中设置了不同的中间账户进行资产托管和转移,并在交易完成后及时销毁,使得在原有跨链交易速率不变的同时,保证了交易的安全性。通过对协议进行仿真模拟表明,该协议适用于以Fabric为代表的联盟链与比特币以及以以太坊为代表的公链,无需第三方区块链介入,即可实现高效安全的跨链资产交换,且在交易效率上比BSN(Blockchain Service Network)的跨链方案节省了约26.8%。改进的协议扩展了传统HTLC跨链资产方案的使用场景,使不同用户间的资产交换兼顾原子性、公平性以及透明性的特点。
