Pedro Branco 0005 Abhishek Jain 0002 Akshayaram Srinivasan Obfuscating Pseudorandom Functions is Post-quantum Complete. 191-221 2025 TCC (2) https://doi.org/10.1007/978-3-032-12293-3_7 conf/tcc/2025-2 db/conf/tcc/tcc2025-2.html#BrancoJS25 streams/conf/tcc