Private Map-Secure Reduce: Infrastructure for Efficient AI Data Markets. - Sameer Wagh; Kenneth Stibler; Shubham Gupta; Lacey Strahm; Irina Bejan; Jiahao Chen; Dave Buckley; Ruchi Bhatia; Jack Bandy; Aayush Agarwal; Andrew Trask (CoRR, 2025)