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SPOTLIGHT PUBLICATION | 27/03/2025

Episode 2: The Quantum-Safe Playbook: How Signal Protected Billions with a Lean Team

Quantum risk is a business risk—and Signal Messenger isn’t waiting for quantum computers to arrive. In this episode of Shielded: The Last Line of Cyber Defense, Johannes Lintzen welcomes Rolfe Schmidt, Research Engineer at Signal Messenger, to explore how one of the world's most privacy-focused messaging platforms implemented post-quantum cryptography—even with a lean team.

Formal Verification – why does it matter for PQC?

Formal verification has become increasingly important in the realm of cryptographic primitives, which serve as the foundational elements of secure communication systems. As cryptographic algorithms underpin the confidentiality, integrity, and authenticity of digital information, any flaw in their implementation can lead to catastrophic security breaches.

Episode 1: Inside Cloudflare’s Post-Quantum Journey: Bas Westerbaan on Real-World Implementation

Is your organization truly prepared for the post-quantum era? In the premier episode of Shielded: The Last Line of Cyber Defense, host Johannes Lintzen is joined by Bas Westerbaan, Research Engineer at Cloudflare, to discuss why organizations must act now on post-quantum cryptography, how to navigate the two-phase migration process, and how to overcome key management, compliance, and performance challenges.

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MIRACLE: MIcRo-ArChitectural Leakage Evaluation: A study of micro-architectural power leakage across many devices

In this paper, we describe an extensible experimental infrastructure for evaluating the micro-architectural leakage, based on power consumption, that stems from a physical device.

A Concrete Treatment of Efficient Continuous Group Key Agreement via Multi-Recipient PKEs

Continuous group key agreements (CGKAs) are a class of protocols that can provide strong security guarantees to secure group messaging protocols such as Signal and MLS.

A lightweight ISE for ChaCha on RISC-V

This paper proposes a lightweight ISE to support the cipher ChaCha on RISC-V architectures. we target embedded computing systems such as IoT edge devices that don’t support a vector engine.

XDIVINSA: eXtended DIVersifying INStruction Agent to Mitigate Power Side-Channel Leakage

Side-channel analysis (SCA) attacks pose a major threat to embedded systems due to their ease of accessibility.

An Instruction Set Extension to Support Software-Based Masking

In both hardware and software, masking can represent an effective means of hardening an implementation against side-channel attack vectors such as Differential Power Analysis (DPA).

Probing Security through Input-Output Separation and Revisited Quasilinear Masking

This paper introduces a new framework for the composition of probing-secure circuits.

SoK: How (not) to Design and Implement Post-quantum Cryptography

Post-quantum cryptography has known a Cambrian explosion in the last decade. We systematize the current state of knowledge on post-quantum cryptography.

Exact Lattice Sampling from Non-Gaussian Distributions

We propose a new framework for (trapdoor) sampling over lattices.

Exploring Parallelism to Improve the Performance of FrodoKEM in Hardware

FrodoKEM is a lattice-based key encapsulation mechanism, currently a semi-finalist in NIST’s post-quantum standardisation effort.

Quantum Computing Threat: NIST PQC standards are here… how can you keep ahead?

Cryptographic agility and a clear roadmap to the NIST standards are key to a smooth and secure transition to PQC.

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.

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.