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The 3-volume-set LNCS 12696 - 12698 constitutes the refereed proceedings of the 40th 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.
List of contents
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.
