HE-PIM: Demystifying Homomorphic Operations on a Real-world Processing-in-Memory System. - Harshita Gupta; Mayank Kabra; Jaewoo Park; Priyam Mehta; Phillip Widdowson; Tathagata Barik; Nisa Bostanci; Konstantinos Kanellopoulos; Juan Gómez-Luna; Antonio J. Peña; Mohammad Sadrosadati; Onur Mutlu (CoRR, 2026)