Post-quantum Secure Non-Committing Registered Functional Encryption (opens in new tab)

Non-committing encryption \(NCE\) is a key primitive for proving security against adaptive corruptions, enabling simulators to generate ciphertexts before the encrypted message is known\. Existing non-committing constructions for attribute-based encryption primitives \[Hiroka et al\., ASIACRYPT 2021; Goyal et al\., PKC 2025\] typically rely on centralized trust that generate users' secret keys\. However, modern cryptographic systems increasingly aim to eliminate such trust assumptions through...