Protecting Blockchain-based Decentralized Timed release of Data from Malicious Adversaries

Timed-release of information refers to releasing protected sensitive data at a future point of time while securely protecting the information until the release time. Blockchain-based self-emerging data infrastructures consist of a group of blockchain accounts that jointly take charge of protecting and transferring the data at the release time. Existing solutions have focused on fully rational adversarial environments in which all peer accounts are rational. However, such protection disregards scenarios in which malicious peer accounts also exist. In our work, we focus on protecting blockchain-based timed-release service in mixed adversarial environments in which both rational peer accounts and malicious peer accounts exist. We introduce our blockchain-based timed-release framework designed for mixed adversarial environments and illustrate two concrete attacks, namely drop attack and release-ahead attack, and discuss our reputation-based solution.