2026-11-04 –, Room 2 Language: English
Quantum computers have the potential to break much of the public-key cryptography that protects today's Internet. Although large-scale quantum computers do not yet exist, organisations are already preparing for the day they become a reality.
This session provides a practical introduction to Post-Quantum Cryptography (PQC). We'll separate hype from reality, explain what quantum computers can and cannot do, discuss the "Harvest Now, Decrypt Later" threat, and introduce the new generation of standardised PQC algorithms.
Finally, we'll explore where PQC is already being deployed—from TLS and IPsec to X.509 certificates and DNSSEC—and what these changes mean for network engineers, security professionals, and packet analysts. Along the way, we'll use Wireshark to examine how post-quantum cryptography appears on the wire and what to look for in real-world network captures.
Johannes works as a network security consultant at SVA System Vertrieb Alexander GmbH in Germany, holding a master's degree in IT Security with a specialisation in IPv6 Security. He excels in implementing next-gen firewalls, DNS appliances, and IPv6 connectivity at customer sites. As a trainer, Johannes conducts classes on IPv6 and DNS, focusing on in-depth technical discussions and security features. His insights and tutorials on IPv6, VPNs, DNSSEC, NTP, Wireshark, and enterprise-grade firewalls (Palo Alto Networks, Fortinet) can be found on his blog at https://weberblog.net/.
For German listeners, he hosts the Security-as-a-Podcast, https://securityasapodcast.de/.