Search
Close this search box.

Post-quantum Cryptography

The first quantum computers have already demonstrated their immense computing power to the general public: From analyzing large volumes of data to simulating molecular reactions to managing traffic and generating sustainable energy, these supercomputers have a multifaceted range of possible uses. However, their ability to break down prime factors make quantum computers a threat to the security of the encryption processes currently in use.

Experts at Fraunhofer AISEC are conducting research into post-quantum cryptography in order to make cryptographic systems quantum-secure and keep digital assets secure against potential attacks by quantum computers.

Headerbild zum Blogartikel "Neue Studie zu Laser-basiertem Fehlerangriff auf XMSS" im Cybersecurityblog des Fraunhofer AISEC
Silvan Streit

Fraunhofer AISEC commissioned by the German Federal Office for Information Security (BSI): new study of laser-based fault attacks on XMSS

To ensure the security of embedded systems, the integrity and authenticity of the software must be verified, for example through signatures. However, targeted hardware attacks enable malware to be used to take over the system. What risks are modern cryptographic implementations exposed to? What countermeasures need to be taken? To answer these questions, Fraunhofer AISEC was commissioned by the German Federal Office for Information Security (BSI) to carry out a study of laser-based fault attacks on XMSS. The focus is on a hash-based, quantum-secure scheme for creating and verifying signatures based on the Winternitz One-Time-Signature (WOTS) scheme.

Read Article »
Silvan Streit 6. March 2024
Maximilian Richter

A (somewhat) gentle introduction to lattice-based post-quantum cryptography

In recent years, significant progress in researching and building quantum computers has been made. A fully-fledged quantum computer would be able to efficiently solve a distinct set of mathematical problems like integer factorization and the discrete logarithm, which are the basis for a wide range of cryptographic schemes. In 2016, NIST announced an open competition with the goal of finding and standardizing suitable algorithms for quantum-resistant cryptography. The standardization effort by NIST is aimed at post-quantum secure KEMs and digital signatures. In this article, two of the to-be-standardized algorithms, Kyber and Dilithium, are presented and some of their mathematical details are outlined. Both algorithms are based on so-called lattices and the thereupon constructed »Learning with Errors«, which we will get to know in the following.

Read Article »
Maximilian Richter 14. June 2023
Nicolas Buchmann

Post-quantum cryptography in practice

The threat posed by quantum computers to the asymmetric cryptography in use today has been well known in the scientific community for more than 25 years, since Peter Shor published a polynomial algorithm for prime factorization to solve the discrete logarithm on a quantum computer. In recent years, crypto experts have increasingly been warning of the progress that is being made in quantum computing and its relevance for cryptography.

Research on post-quantum cryptography (PQC) at the Fraunhofer Institute for Applied and Integrated Security AISEC aims to enable businesses, government bodies and citizens to continue to have access to usable cryptography that will remain secure in the long term so they can keep their data secure. This blog article provides a brief overview of four ongoing projects.

Read Article »
Nicolas Buchmann 5. October 2022
Other Topics

White Hat Hacking

Secure Digital Identities

Trusted AI

Industrial Security

IoT Security

Mobile Security