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| 15/02/2021
Quantum Computing Threat: An Overview of Post-Quantum Cryptography
The goal of this document is to provide the reader with an understanding of the key technical ideas used in post‐quantum cryptography.
| 15/02/2021
Quantum Computing Threat: The First NIST Post-Quantum Cryptographic Standards
In 2016, the National Institute of Standards and Technology (NIST) launched a open and world‐ wide effort to propose, analyze and eventually standardize post‐quantum cryptographic schemes. In this white paper we find out more.
| 07/12/2020
Scalable Ciphertext Compression Techniques for Post-quantum KEMs and Their Applications
A multi-recipient key encapsulation mechanism, or mKEM, provides a scalable solution to securely communicating to a large group.
| 03/12/2020
The design of scalar AES Instruction Set Extensions for RISC-V
We survey the state-of-the-art industrial and academic ISEs for AES, implement and evaluate five different ISEs, one of which is novel.
| 14/11/2020
Building a Modern TRNG: An Entropy Source Interface for RISC-V
The currently proposed RISC-V True Random Number Generator (TRNG) architecture breaks with previous ISA TRNG practice by splitting the Entropy Source (ES) component away from cryptographic PRNGs into a separate interface, and in its use of polling. We describe the interface, its use in cryptography, and offer additional discussion, background, and rationale for various aspects of it.
| 05/10/2020
ModFalcon: Compact Signatures Based On Module-NTRU Lattices
We introduce a new family of signature schemes based on the falcon design, which relies on module lattices. Our concrete instantiation enjoys the compactness and efficiency of falcon, and allows an intermediate security level.
| 14/09/2020
Cryptographic Divergences: New Techniques and New Applications
In the recent years, some security proofs in cryptography have known significant improvements by replacing the statistical distance with alternative divergences.
| 03/08/2020
Mobile Energy Requirements of the Upcoming NIST Post-Quantum Cryptography Standards
We present an energy requirement analysis based on extensive measurements of PQC candidate algorithms on a Cortex M4 - based reference platform.
| 11/06/2020
Post-Quantum Ciphertext Compression and Applications to Secure Group Messaging
A standard method to establish secure communications between two or more parties is to encrypt a common session key via a key encapsulation mechanism (or KEM).
| 11/06/2020
Secure Update Propagation via Set-Homomorphic Signatures
In this document, we propose to use homomorphic signatures to maintain a consistent database across all nodes of distributed network.
| 11/05/2020
Pyjamask: Block Cipher and Authenticated Encryption with Highly Efficient Masked Implementation
This paper introduces Pyjamask, a new block cipher family and authenticated encryption proposal submitted to the NIST lightweight cryptography standardization process.
| 10/05/2020
Integral Matrix Gram Root and Lattice Gaussian Sampling Without Floats
In this paper, we give techniques to implement Gaussian sampling over general lattices without using FPA. To this end, we revisit the approach of Peikert, using perturbation sampling.