When Trying to Catch Cheaters Breaks the MPC: Breaking and Fixing Delayed Consistency Checks in Trident, Fantastic Four, SWIFT, and Quad (Full Version)

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Fast Isogeny Evaluation on Binary Curves Quick Draw Queries: Lightweight Searchable Public-key Ciphertexts with Hidden Structures via Non-Interactive Key Exchange A Constructive Treatment of Authentication Boolean Arithmetic over $\mathbb{F}_2$ from Group Commutators HAWK with Hint: Algebraic Key Recovery from Side-Channel Leakage Post-Quantum Secure k-Times Traceable Ring Signature A Key Schedule Design and Evaluation under Boundary Round-Key Leakage 2G2T: Constant-Size, Statistically Sound MSM Outsourcing Proximity Signatures Breaking Optimized HQC: The First Cache-Timing Full Decryption Oracle Key-Recovery Attack in Post-Quantum Cryptography Efficient Partially Blind Signatures from Isogenies Evaluating PQC KEMs, Combiners, and Cascade Encryption via Adaptive IND-CPA Testing Using Deep Learning High-Throughput Side-Channel-Protected Stream Cipher Hardware for 6G Systems Efficient e = 3 Threshold RSA via Integer Coordinates for Intel SGX Zeal: PIR for Non-Cooperative Databases VEIL: Lightweight Zero-Knowledge for Hash-Based Multilinear Proof Systems Witness-Indistinguishable Arguments of Knowledge and One-Way Functions The many faces of Schnorr: a touch-up Open Problems in List Decoding and Correlated Agreement Compressed Key Exchange Protocol from Orientations of Large Discriminant Using AVX-512 SPLASH: SPeculative Leakage-Adaptive Secure Hardware An Efficient Identity-Based Blind Signature Scheme from SM9 Efficient Batch Threshold Encryption Using Partial Fraction Techniques A note on the Unsuitability of LIGA for Linkable Ring Signatures: The perils of non-commutativity Verification Facade: Masquerading Insecure Cryptographic Implementations as Verified Code Cryptographic Implications of Worst-Case Hardness of Time-Bounded Kolmogorov Complexity Efficient Merkle-Tree Consistent Accumulator FLOSS: Fast Linear Online Secret-Shared Shuffling Which Privacy Blanket is Optimal in the Shuffle Model? Applications of Bruhat-Chevalley-Renner Decomposition to Metric-Aware Code-Based Cryptography Expanders Meet Reed-Muller: Easy Instances of Noisy k-XOR Verifiable Divide-and-Conquer Pseudorandomness of UFLM: A Characterization via Its Linear Layer QED-Lite: Lightweight Detection of Quantum-Vulnerable ELF Binaries via Cryptographic Library Version Fingerprinting Reformulating the SNOVA Signature Scheme Game Theory Does Not Always Help: The Case of Statistical Multi-Party Coin Tossing Improved Codes and Decoders for HQC Delegate: Coalition Proof Incentivized Outsourced Computation with Smart Contracts Fast and Efficient Perfectly Secure Network-Agnostic Secure Computation Tighter Bounds for the Oblivious Bit-Fixing Inner Product Extractor on Biased Seeds Random Robust Secret Sharing with Perfect Privacy and its Applications Counting and recovering the quadratic relations of a vectorial function A Search-to-Decision Reduction for Continuous LWE Robot: Robust Threshold BBS+ in Two Rounds Perils of Parallelism: Transaction Fee Mechanisms under Execution Uncertainty Synthesis of RTL-based Characterization Programs for Fault Injection SSLE-DAG: A High-Throughput Proof-of-Stake Consensus Protocol Combining an Adaptive DAG with a Single Secret Leader Election On Optimal Information-Theoretic Security in Symmetric Encryption under Low-Entropy Keys Efficient and Parallel Implementation of Isogeny-based Deterministic Group Actions Fast and Compact Lattice-Based Registration-Based Encryption Graph-based Asynchrony with Quasilinear Complexity for Any Linear Verifiable Secret Sharing Scheme MTSF --- Market-Theoretic Security Framework: A Unified Paradigm For The Art Of Proving and Disproving Security Ticket to Hide: Private, Practical Proofs of Provenance for TLS Linear Code Equivalence via Plücker Coordinates Survey of isogeny-based signature schemes resistant to Castryck–Decru attack On the Need for (Quantum) Memory with Short Outputs Simulating Noisy Leakage with Bounded Leakage: Simpler, Better, Faster Relaxed Modular PCS from Arbitrary PCS and Applications to SNARKs for Integers Tripling on Hessian curves via isogeny decomposition Reducing the Number of Qubits in Quantum Discrete Logarithms on Elliptic Curves At-Compromise Security: The Case for Alert Blindness A Practical Neighborhood Search Attack on Oracle MLWE Designated-Verifier Dynamic zk-SNARKs with Applications to Dynamic Proofs of Index Abelian surfaces in Hesse form and explicit isogeny formulas Efficiently Provable Approximations for Non-Polynomial Functions Laminate: Succinct SIMD-Friendly Verifiable FHE Accelerating FrodoKEM in Hardware TSS-PV: Traceable Secret Sharing with Public Verifiability PIRANHAS: PrIvacy-Preserving Remote Attestation in Non-Hierarchical Asynchronous Swarms Small-field hash-based SNARGs are less sound than conjectured Hash-Based Blind Signatures: First Steps Partial Fraction Techniques for Cryptography VIA: Communication-Efficient Single-Server Private Information Retrieval Enabling Index-free Adjacency in Oblivious Graph Processing with Delayed Duplications Accurate BGV Parameters Selection: Accounting for Secret and Public Key Dependencies in Average-Case Analysis Multi-Party Functional Encryption (MPFE): A tool in the distributed and decentralized world Compact, Efficient and CCA-Secure Updatable Encryption from Isogenies Faster Homomorphic Integer Computer Tempo: An ML-KEM to PAKE Compiler Resilient to Timing Attacks OhLaLa: Combined Security against Region Fault Attacks in Constant Protection Order Threshold Signatures Reloaded: ML-DSA and Enhanced Raccoon with Identifiable Aborts The Pipes Model for Latency and Throughput Analysis Tighter Quantum Security for Fiat-Shamir-with-Aborts and Hash-and-Sign-with-Retry Signatures InstaRand: Instantly Available and Instantly Verifiable On-chain Randomness Simple and Efficient Lattice Threshold Signatures with Identifiable Aborts BERMUDA: A BPSec-Compatible Key Management Scheme for DTNs Making Uncertified DAG BFT Provably Live with Linear Payload and Quadratic Metadata Communication A proof of P≠NP (New symmetric encryption algorithm against any linear attacks and differential attacks) ETK: External-Operations TreeKEM and the Security of MLS in RFC 9420 A Combinatorial Attack on Ternary Sparse Learning with Errors (sLWE) A Divide-and-Conquer Strategy for Hard-Label Extraction of Deep Neural Networks via Side-Channel Attacks On the practicality of quantum sieving algorithms for the shortest vector problem Dynamic zk-SNARKs (with applications to sparse zk-SNARKs and IVC) ProxCode: Efficient Proximity Searchable Encryption from Error Correcting Codes Two-Round Threshold Signature from Algebraic One-More Learning with Errors The Last Challenge Attack on Fiat-Shamir in KZG-based SNARKs A New Perspective on Key Switching for BGV-like Schemes Improved Circuit Synthesis with Multi-Value Bootstrapping for FHEW-like Schemes DiStefano: Decentralized Infrastructure for Sharing Trusted Encrypted Facts and Nothing More Finding and Evaluating Parameters for BGV

Andreas Brüg · 2026-02-12 · via Cryptology ePrint Archive

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Cryptology ePrint Archive

Paper 2026/234

When Trying to Catch Cheaters Breaks the MPC: Breaking and Fixing Delayed Consistency Checks in Trident, Fantastic Four, SWIFT, and Quad (Full Version)

Abstract