drasyl: Overlay Network Framework for Rapid Development of Distributed P2P Applications

About drasyl

By using drasyl developers can fully concentrate on creating distributed applications. With drasyl, boundaries between IP-based networks will be eliminated and secure communication channels between any peers will be provided. No configuration is required to use drasyl. Developers can run a new drasyl node without having to write configuration files or provide IP addresses of peers.

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  • Provides Communication Channels between any two Nodes (on the Internet)
  • Automatic Discovery of Peers running within same Process, Computer, LAN, or the Internet
  • Automatic Handover to most local Communication Channel
  • Overcomes Network Barriers (Stateful Firewalls, NATs)
  • Communication is (PFS) encrypted
  • Reacts to Network Connection Changes
  • Asynchronous and Event-Driven
  • Lightweight & Extensible


drasyl is used in a number of research projects, where it is in charge of secure and pervasive communication.


Distributed best-effort computation offloading in heterogeneous environments.

Smart Networks for Urban Participation

Open, citizen-centric, scalable, and privacy-preserving smart city platform.

Attribute-Based SkipNet

Enhanced SkipNet overlay supporting attributed-based search and range queries.


H. Bornholdt, K. Röbert and P. Kisters, "Accessing Smart City Services in Untrustworthy Environments via Decentralized Privacy-Preserving Overlay Networks," 2021 IEEE International Conference on Service-Oriented System Engineering (SOSE), 2021, pp. 144-149, doi: 10.1109/SOSE52839.2021.00021.


drasyl is being developed by researchers and students of the Universität Hamburg as part of research projects and lectures.

Heiko Bornholdt

Research Assistant

Kevin Röbert

Research Assistant