Provable and Practical Security

Signature Schemes.- Group Signature without Random Oracles from Randomizable Signatures.- Constant-size Lattice-Based Group Signature with Forward Security in the Standard Model.- A Lattice-based Provably Secure Multisignature Scheme in Quantum Random Oracle Model.- Achieving Pairing-Free Aggregate Signatures using Pre-Communication between Signers.- Short Lattice Signatures in the Standard Model with Efficient Tag Generation.- One-Time Delegation of Unlinkable Signing Rights and Its Application.- Watermarkable Signature with Computational Function Preserving.- Privacy-Preserving Authentication for Tree-Structured Data with Designated Verification in Outsourced Environments.- Encryption Schemes and NIZKs.- Semi-Adaptively Secure Offine Witness Encryption from Puncturable Witness PRF.-Improved Indistinguishability for Searchable Symmetric Encryption.- Receiver Selective Opening CCA Secure Public Key Encryption from Various Assumptions.- A Practical NIZK Argument for Confidential Transactions over Account-model Blockchain.- Secure Machine Learning and Multiparty Computation.- Secure Cumulative Reward Maximization in Linear Stochastic Bandits.- Secure Transfer Learning for Machine Fault Diagnosis under Different Operating Conditions.- Private Decision Tree Evaluation with Constant Rounds via (Only) SS-3PC over Ring.- Dispelling Myths on Superposition Attacks: Formal Security Model and Attack Analyses.- Secret Sharing Schemes.- Fair and Sound Secret Sharing from Homomorphic Time-Lock Puzzles.- Optimal Threshold Changeable Secret Sharing with New Threshold Change Range.- Security Analyses.- Key Recovery under Plaintext Checking Attack on LAC.- Security of Two NIST Candidates in the Presence of Randomness Reuse.