Theory of Cryptography [electronic resource] : 19th International Conference, TCC 2021, Raleigh, NC, USA, November 8–11, 2021, Proceedings, Part III /

Covert Learning: How to Learn with an Untrusted Intermediary -- Random-Index PIR and Applications -- Forward Secret Encrypted RAM: Lower Bounds and Applications -- Laconic Private Set Intersection and Applications -- Amortizing Rate-1 OT and Applications to PIR and PSI -- Ring-based Identity Based Encryption { Asymptotically Shorter MPK and Tighter Security -- Cryptographic Shallots: A Formal Treatment of Repliable Onion Encryption -- Grafting Key Trees: Efficient Key Management for Overlapping Groups -- Updatable Public Key Encryption in the Standard Model -- Towards Tight Adaptive Security of Non-Interactive Key Exchange -- On the Impossibility of Purely Algebraic Signatures -- Policy-Compliant Signatures -- Simple and Efficient Batch Verification Techniques for Verifiable Delay Functions -- Non-Malleable Vector Commitments via Local Equivocability -- Non-Malleable Time-Lock Puzzles and Applications -- Vector and Functional Commitments from Lattices.-.

The three-volume set LNCS 13042, LNCS 13043 and LNCS 13044 constitutes the refereed proceedings of the 19th International Conference on Theory of Cryptography, TCC 2021, held in Raleigh, NC, USA, in November 2021. The total of 66 full papers presented in this three-volume set was carefully reviewed and selected from 161 submissions. They cover topics on proof systems, attribute-based and functional encryption, obfuscation, key management and secure communication.