The 3-volume-set LNCS 12696 - 12698 constitutes the refereed proceedings of the 40
th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Eurocrypt 2021, which was held in Zagreb, Croatia, during October 17-21, 2021.
The 78 full papers included in these proceedings were accepted from a total of 400 submissions. They were organized in topical sections as follows:
Part I: Best papers; public-key cryptography; isogenies; post-quantum cryptography; lattices; homomorphic encryption; symmetric cryptanalysis;
Part II: Symmetric designs; real-world cryptanalysis; implementation issues; masking and secret-sharing; leakage, faults and tampering; quantum constructions and proofs; multiparty computation;
Part III: Garbled circuits; indistinguishability obfuscation; non-malleable commitments; zero-knowledge proofs; property-preserving hash functions and ORAM; blockchain; privacy and law enforcement.
Non-Interactive Zero Knowledge from Sub-exponential DDH.- On the (in)security of ROS.- New Representations of the AES Key Schedule.- Public-Key Cryptography.- Analysing the HPKE Standard.- Tightly-Secure Authenticated Key Exchange, Revisited.- Aggregatable Distributed Key Generation.- Decentralized Multi-Authority ABE for DNFs from LWE.- Isogenies.- Compact, Efficient and UC-Secure Isogeny-Based Oblivious Transfer.- One-way functions and malleability oracles: Hidden shift attacks on isogenybased protocols.- Sieving for twin smooth integers with solutions to the Prouhet-Tarry-Escott problem.- Delay Encryption.- Post-Quantum Cryptography.- The Nested Subset Differential Attack: A Practical Direct Attack Against LUOV which Forges a Signature within 210 Minutes.- Improved cryptanalysis of UOV and Rainbow.- Cryptanalytic Applications of the Polynomial Method for Solving Multivariate Equation Systems over GF(2).- Round-Optimal Blind Signatures in the Plain Model from Classical and Quantum Standard Assumptions.- Post-Quantum Multi-Party Computation.- Lattices.- A 2 /² -Time Algorithm for n-SVP and n-Hermite SVP, and an Improved Time-Approximation Tradeoff for (H)SVP.- New Lattice Two-Stage Sampling Technique and its Applications to Functional Encryption - Stronger Security and Smaller Ciphertexts.- On Bounded Distance Decoding with Predicate: Breaking the "Lattice Barrier" for the Hidden Number Problem.- On the ideal shortest vector problem over random rational primes.- Homomorphic Encryption.- Efficient Bootstrapping for Approximate Homomorphic Encryption with Non-Sparse Keys.- High-Precision Bootstrapping of RNS-CKKS Homomorphic Encryption Using Optimal Minimax Polynomial Approximation and Inverse Sine Function.- On the Security of Homomorphic Encryption on Approximate Numbers.- The Rise of Paillier: Homomorphic Secret Sharing and Public-Key Silent OT.- Symmetric Cryptanalysis.- Improved Linear Approximations to ARX Ciphers and Attacks Against ChaCha.- Rotational Cryptanalysis From a Differential-Linear Perspective - Practical Distinguishers for Round-reduced FRIET, Xoodoo, and Alzette.- Automatic Search of Meet-in-the-Middle Preimage Attacks on AES-like Hashing.- A Deeper Look at Machine Learning-Based Cryptanalysis.
