Highly Available Communication for Financial Networks


This project started in 2016 and is ongoing.


Various members of the Network Security Group.

Industry partners



Communication, in particular for critical infrastructures, requires a high level of availability that remains available despite earthquakes, power outages, misconfigurations, or network attackers. One example is the financial industry, which has high requirements on availability to ensure that up-to-date trading information is accessible, that financial transactions are executed within short time windows, and that end customers can execute banking applications online.

The financial industry is generally a prime target for network attackers, mainly because of the importance of availability for banking applications. The importance of availability has lead to several extortion attacks in the past, where banks would sometimes pay for attack termination in the short term, rather than protecting their networks for the long term.

To provide high availability and thus to make the financial industry robust against the aforementioned attacks and calamities, we investigate the deployment of multi-path connectivity between branches of one of our ZISC banking partners. In the context of the future Internet architecture SCION, designed and developed at ZISC, we focus on connecting branches over multiple existing links at the same time. We are deploying a multi-path communication system that automatically selects multiple independent, high-quality paths to avoid outages even if some of the independent paths fail.

To further increase the resilience against attacks, in particular in the context of DDoS defense and IoT security, our architecture offers the option to hide paths from the public and thus to prevent attackers from flooding such invisible paths. Moreover, we have developed a scalable bandwidth-reservation scheme that protects inter-domain communication by establishing fine-grained resource allocations to ensure no links between networks are saturated.


A. Perrig, P. Szalachowski, R. M. Reischuk, L. Chuat.
SCION: A Secure Internet Architecture
Springer International Publishing AG, 2017.

D. Barrera, R. M. Reischuk, P. Szalachowski, A. Perrig.
An Internet Architecture for the 21st Century
Communications of the ACM (CACM), 2017.

Markus Legner, Tobias Klenze, Marc Wyss, Christoph Sprenger, and Adrian Perrig.
EPIC: Every Packet Is Checked in the Data Plane of a Path-Aware Internet.
In Proceedings of the USENIX Security Symposium 2020.

Benjamin Rothenberger, Dominik Roos, Markus Legner, and Adrian Perrig.
PISKES: Pragmatic Internet-Scale Key-Establishment System.
In Proceedings of the ACM Asia Conference on Computer and Communications Security (ASIACCS) 2020.

Cyrill Krähenbühl, Seyedali Tabaeiaghdaei, Christelle Gloor, Jonghoon Kwon, David Hausheer, Aadrian Perrig, and Dominic Roos.
Deployment and Scalability of an Inter-Domain Multi-Path Routing Infrastructure.
ACM Conference on emerging Networking EXperiments and Technologies (CoNEXT) 2021.