Module-Lattice-Based Digital Signature Algorithm Utility 20260908

This is mldsa, a module-lattice-based digital signature algorithm utility for generating keypairs, signing and verifying files and data. It has an alter ego, mlsignify, implementing the same command line switches as signify1. The mldsa and mlsignify utilities are based on the libmldsa3 library,...

Benchmarking Optical Receivers for Quantum Communication and Randomness Certification

The choice of optical receiver determines which properties of the transmitted states remain visible in the observed data and therefore affects the performance of different quantum protocols. We compare continuous-variable, photon-counting and hybrid receivers within the same prepare-and-measure...

A Quantum Algorithm for One-Shot Signatures

We provide a pre-obfuscation circuit-level implementation of an efficient one shot signature scheme, which has known applications to delegated signatures, secured token transfer, and publicly verifiable randomness. The algorithm consists of two stages: a key generation stage where a classical...

CVE-2026-41509

CROSS implementation contains reference and optimized implementations of the CROSS post-quantum signature algorithm. Prior to commit fc6b7e7, there is a buffer overflow in cryptosignopen caused by an underflow of the integer mlen. This issue has been patched via commit fc6b7e7...

CVE-2026-41509

CROSS implementation contains reference and optimized implementations of the CROSS post-quantum signature algorithm. Prior to commit fc6b7e7, there is a buffer overflow in cryptosignopen caused by an underflow of the integer mlen. This issue has been patched via commit fc6b7e7...

CVE-2026-41509 Integer underflow in crypto_sign_open() leads to buffer overflow

CROSS implementation contains reference and optimized implementations of the CROSS post-quantum signature algorithm. Prior to commit fc6b7e7, there is a buffer overflow in cryptosignopen caused by an underflow of the integer mlen. This issue has been patched via commit fc6b7e7...

EUVD-2026-28598

CROSS implementation contains reference and optimized implementations of the CROSS post-quantum signature algorithm. Prior to commit fc6b7e7, there is a buffer overflow in cryptosignopen caused by an underflow of the integer mlen. This issue has been patched via commit fc6b7e7...

CVE-2026-41509

The CVE-2026-41509 entry concerns the CROSS implementation of the CROSS post-quantum signature algorithm. A buffer overflow in crypto_sign_open() was caused by an underflow of the length field (mlen) before commit fc6b7e7. This underflow vulnerability could enable an overflow during signature ver...

CVE-2026-41509 Integer underflow in crypto_sign_open() leads to buffer overflow

CROSS implementation contains reference and optimized implementations of the CROSS post-quantum signature algorithm. Prior to commit fc6b7e7, there is a buffer overflow in cryptosignopen caused by an underflow of the integer mlen. This issue has been patched via commit fc6b7e7...

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 Four Arbitrated Quantum Signature Schemes

Arbitrated quantum signature AQS schemes aim at ensuring the authenticity of a message with the help of an arbitrator. Moreover, they aim at preventing repudiation, both from a sender that denies the origin of a message, and from a receiver who disavows its reception. Such protocols use quantum...

Claude Code Can Debug Low-level Cryptography

Over the past few days I wrote a new Go implementation of ML-DSA, a post-quantum signature algorithm specified by NIST last summer. I livecoded it all over four days, finishing it on Thursday evening. Except… Verify was always rejecting valid signatures. $ bin/go test crypto/internal/fips140/mlds...

Secure and Efficient Quantum Signature Scheme Based on the Controlled Unitary Operations Encryption

Quantum digital signatures ensure unforgeable message authenticity and integrity using quantum principles, offering unconditional security against both classical and quantum attacks. They are crucial for secure communication in high-stakes environments, ensuring trust and long-term protection in...