Interested in Distributed Ledger Technology... in particular, XRP and the XRP Ledger and the XRPL Consensus Algorithm designed by Ripple Labs.
A couple of interesting things to read:
Analysis of the XRP Ledger Consensus Protocol: https://arxiv.org/abs/1802.07242
Cobalt: BFT Governance in Open Networks: https://arxiv.org/abs/1802.07240
InterLedger Protocol (ILP): https://www.interledger.org