HOME PRODUCTS SERVICES BLOG ABOUT Building bonds between traditional and decentralized finances AMIS is a financial technology company creating bonds between traditional and decentralized worlds. We provide security and accessibility for blockchains as well as crypto currencies. With us, our customers are able to adopt blockchain technology with ease and confidence. Contact Us Products Digital Asset Custody - AMIS Wallet Service Institutional-grade security digital asset custody. Our advanced protocols and cryptographic systems ensure that your assets remain securely under your control. Blockchain Service AMIS BaaS offers highly available blockchain API. Relying on our proprietary smart node management system, businesses can focus on core business logic without the headaches of blockchain node management. Hierarchical Threshold Signature Adopt multiple participants and multiple level approval processes into cryptographic signature without ever revealing the shared private secret. Wallets From cold storage, asset custody, wallet development API, to DeFi multisig wallet, AMIS provides full stack of wallet solutions for different use cases. Services Build blockchain applications with AMIS’s expertise on private/consortium chain construction, node cluster management, smart contract development, and customizable API and webhooks. Blockchain Applications Adopt multiple participants and multiple level approval processes into cryptographic signature without ever revealing the shared private secret. Hierarchical Threshold Signature Chat with us on blockchain use cases, from asset custody, private/consortium chains, cryptography, to any blockchain technologies. Blockchain Consulting Latest Articles & Open Sources Introduction to Hierarchical Threshold Signature Read more in Medium@getamis Compared to multi-signature, TSS offers shorter signature and better privacy. Most importantly, TSS does not save private key on the server and provides risk control as well as separation of duties. It seems that TSS may be a fabulous solution, but there are still some problems. For example, an important contract not only requires enough shares to sign, but also needs to be signed by a manager. Despite the fact that vertical access control can be realized on the application layer and tracked by an audit log. Once a hack happens, we will have no idea about who to blame for in TSS. Hierarchical Threshold Signature Demonstration Read more in Medium@getamis In this article, we will explain thoroughly about the example of Alice, an implementation of HTSS library worked by us. We will first illustrate the simplification of our example flow. Second, we will highlight the takeaway when running the example. Then, we will dive into the detail of 3 main commands of our TSS library. Last, we will conclude the demonstration. LibraBridge: Connect Libra with Ethereum Read more in Medium@getamis In the previous article, we explain the concept of the LibraSwap. Next, we will introduce LibraBridge, which can be used to connect Libra with Ethereum by Libra SPV method. The idea to leverage SPV validation to implement cross-chain transfer is not new. It’s already done by several projects listed below. SPV proof is a way for light client to verify if interested transaction happened on the blockchain. With the help of smart contract, Libra SPV proof can be implemented on Ethereum. Namely, we can verify a Libra transaction through smart contract, along with some external information. MAICOIN GROUP SERVICES&POLICY About MaiCoin Group Digital Asset Custody MaiCoin Disclosure MaiCoin | MAX Privacy Headquarter (HQ) Terms of Use CONTACT E-mail : info@amis.com HQ Address : 104, Sec.1, Bade Rd. Zhongzheng District, Taipei City Careers © AMIS Technologies Co., Ltd.