Pisces: Cryptography-based Private Retrieval-Augmented Generation with Dual-Path Retrieval - Liang, Xiaojian; Song, Lushan; Du, Shishuai; Zhu, Weicheng; Faith, Tan; Sim, Jun Jie; Jin, Haibing; Wu, Zhenghao; Liu, Yingting; Zhang, Xin; Yang, Jiangming; Duan, Pu (International Conference on Learning Representations, 2026)