A Practical Semi-Quantum Signature Protocol with Improved Eavesdropping Detection

Semi-quantum signature SQS schemes aim to enable quantum signature functionality in scenarios where only a subset of participants possess full quantum capabilities, thereby improving practical deployability while preserving quantum security advantages. Within this framework, we present a practica...

Cryptanalysis of LC-MUME: a Lightweight Certificateless Multi-User Matchmaking Encryption for Mobile Devices

Yang et al. proposed a lightweight certificateless multiuser matchmaking encryption LC-MUME scheme for mobile devices, published in IEEE Transactions on Information Forensics and Security TIFS DOI: 10.1109/TIFS.2023.3321961. Their construction aims to reduce computational and communication overhe...

Invariant-Based Cryptography: toward a General Framework

We develop a generalized framework for invariant-based cryptography by extending the use of structural identities as core cryptographic mechanisms. Starting from a previously introduced scheme where a secret is encoded via a four-point algebraic invariant over masked functional values, we broaden...

CVE-2020-36843

A flaw was found in EdDSA-Java ed25519-java. This vulnerability allows attackers to create new valid signatures different from previous signatures for a known message via signature malleability, violating the Strong Existential Unforgeability under Chosen Message Attacks SUF-CMA property...

GHSA-P53J-G8PW-4W5F Ed25519 Signature Malleability in ed25519-java Due to Missing Scalar Range Check

The implementation of EdDSA in EdDSA-Java aka ed25519-java through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA Strong Existential Unforgeability under Chosen Message Attacks property. This allows attackers to create new valid signatures different from previous signature...

DEBIAN-CVE-2020-36843

The implementation of EdDSA in EdDSA-Java aka ed25519-java through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA Strong Existential Unforgeability under Chosen Message Attacks property. This allows attackers to create new valid signatures different from previous signature...

CVE-2020-36843

CVE-2020-36843 affects EdDSA-Java (ed25519-java) up to 0.3.0, causing signature malleability and failure of SUF-CMA. Connected IBM advisories document concrete products/versions at risk and available fixes: IBM App Connect Enterprise Toolkit v13.0.1.0–13.0.4.2 with APAR IT48311, fixed in 13.0.5.0...