The Federal Reserve Bank of Boston (Boston Fed) and the MIT’s Digital Currency Initiative (MIT DCI) on research known as ‘Project Hamilton’
Read here: https://www.bostonfed.org/publications/one-time-pubs/project-hamilton-phase-1-executive-summary.aspx
Link to paper: https://www.bostonfed.org/-/media/Documents/Project-Hamilton/Project-Hamilton-Phase-1-Whitepaper.pdf