TL;DR
It is shown that in a BIKE multi-instance setting an attacker can construct a DOOM instance with nM syndromes, and multi-instance security of code-based KEMs degrades as a function of M.
This paper suggests that as a key exchange mechanism, BB84 should be run with security parameters comparable to those of ML-KEM, and analyzes performance implications if this choice is taken, and offers general guidelines for BB84 parameter selection.
Hamming Quasi-Cyclic (HQC) has been selected by NIST as a standard for code-based Post-Quantum Cryptography (PQC) Key Encapsulation Mechanisms (KEMs). While HQC offers robust theoretical security based on the Decisional Quasi- Cyclic Syndrome Decoding problem, its physical implementation is vulnerable to side-channel a...
A main application of quantum information in cryptography is copy-protection, where we encode a functionality (such as a decryption key or software) into a reusable quantum state so that it cannot be split into two adversaries (called freeloaders) that both remain useful. Previous works have only shown security for ind...
The Miranda signature scheme relies on masking a matrix code which disposes of a masked underlying structure, and the knowledge of which allows for efficient error decoding. We consider a Gabidulin code which is expanded into a matrix code, that is only \Fq-linear. An additional masking is then applied to it. The attac...
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