辫子群上的代理签名和指定验证者签名方案

SILMARILS: 信息论和量子安全的指定验证者签名

SILMARILS: Information-Theoretic and Quantum-Secure Designated-Verifier Signatures

SILMARILS基于有限域上的最小代数核心，结合真实随机性和完美2-2 Shamir秘密共享，实现了可转移的指定验证者签名方案，提供了信息论和量子安全性的保障。

Anonymous Single-Sign-On for n designated services with traceability

Anonymous Single-Sign-On authentication schemes have been proposed to allow users to access a service protected by a verifier without revealing their identity which has become more important due to the introduction of strong privacy regulations. In this paper we describe a new approach whereby anonymous authentication to different verifiers is achieved via authorisation tags and pseudonyms. The particular innovation of our scheme is authentication can only occur between a user and its designated verifier for a service, and the verification cannot be performed by any other verifier. The benefit…

Multi-theorem (Malicious) Designated-Verifier NIZK for QMA

We present the first non-interactive zero-knowledge argument system for QMA with multi-theorem security. Our protocol setup constitutes an additional improvement and is constructed in the malicious designated-verifier (MDV-NIZK) model (Quach, Rothblum, and Wichs, EUROCRYPT 2019), where the setup consists of a trusted part that includes only a common uniformly random string and an untrusted part of classical public and secret verification keys, which even if sampled maliciously by the verifier, the zero knowledge property still holds. The security of our protocol is established under the Learni…

LaSDVS：一种后量子安全的紧凑型强指定验证者签名

LaSDVS : A Post-Quantum Secure Compact Strong-Designated Verifier Signature

本文提出基于理想格与Ring-SIS/Ring-LWE困难假设的后量子强指定验证者签名方案LaSDVS，通过环结构和gadget陷门实现强不可伪造性、不可转移性等安全属性，并将签名尺寸从O(n^2)降至O(n log q)，在现有PQC-SDVS中实现最小私钥与签名尺寸。

IoT-REX：基于中心化多指定验证者签名的物联网设备安全远程控制系统

IoT-REX: A Secure Remote-Control System for IoT Devices from Centralized Multi-Designated Verifier Signatures

本文提出IoT-REX远程控制系统，通过新设计的中心化多指定验证者签名（CMDVS）实现对受感染物联网设备的安全定向控制，实验表明通信规模可压缩至约30%，速度提升三倍。

Anonymous Single Sign-on with Proxy Re-Verification

An anonymous Single Sign-On (ASSO) scheme allows users to access multiple services anonymously using one credential. We propose a new ASSO scheme, where users can access services anonymously through the use of anonymous credentials and unlinkably through the provision of designated verifiers. Notably, verifiers cannot link service requests of a user even if they collude. The novelty is that when a designated verifier is unavailable, a central authority can authorise new verifiers to authenticate the user on behalf of the original verifier. Furthermore, if required, a central verifier is author…

Anonymous proof-of-asset transactions using designated blind signatures

We propose a scheme to preserve the anonymity of users in proof-of-asset transactions. We assume bitcoin-like cryptocurrency systems in which a user must prove the strength of its assets (i.e., solvency), prior conducting further transactions. The traditional way of addressing such a problem is the use of blind signatures, i.e., a kind of digital signature whose properties satisfy the anonymity of the signer. Our work focuses on the use of a designated verifier signature scheme that limits to only a single authorized party (within a group of signature requesters) to verify the correctness of t…