Off-chain transactions seek to address the low on-chain scalability and enable blockchain-
based payments over unreliable on-chain networks. The key problem with existing works is …

Blockchain protocols for cryptocurrencies offer secure payment transactions, yet their
throughput pales in comparison to centralized payment systems such as VISA. Moreover …

Randpay is a technology developed in Emercoin for blockchain micropayments that can be
more effective in some scenarios than the Lightning Network, as seen in the paper. The …

Blockchain-based1 decentralized applications (DApps) are applications that operate on
blockchain smart contracts. A smart contract is a program that runs on blockchain where the …

The development of e-commerce applications for small-value transactions introduces
significant security and privacy challenges. Micropurchases, that is, commercial operations …

With the rapid growth of blockchain-based Non-Fungible Tokens (NFTs), data trading has
evolved to incorporate NFTs for ownership verification. However, the NFT ecosystem faces …

No contexto atual, a digitalização acelerada dos mercados globais e a expansão do
ecommerce evidenciam a importância crítica dos sistemas de pagamento online. Porém …