Belenios
Verifiable online voting system


To set up an election, you may simply use our voting platform.

Belenios aims at providing an easy to use voting system, guaranteeing state-of-the-art security, namely vote privacy and verifiability. It can be used in many types of elections (including referendums), ranging from scientific councils to sport associations.

  • Vote privacy: no one can learn the vote of a voter. Vote privacy relies on the encryption of the votes.
  • Verifiablity: Every voter can check that her vote has been counted and only eligible voters may vote. Verifiablity relies on the fact that the ballot box is public (voters can check that their ballots have been received) and on the fact that the tally is publicly verifiable (anyone can recount the votes). Moreover, ballots are signed by the voter credential (only eligible voters are able vote).

Release of Belenios 3.1

2025-05-22

Belenios 3.1 mostly includes important fixes after the deployment of our new administrator interface.

It also includes some security enhancements. Some of them follow remarks from Thomas Haines and Jarrod Rose. Others (eg use of AES-GCM instead of AES-CCM, reduced usage of SJCL) have been suggested after the CSPN evaluation, unfortunately not successful for Belenios.

VCAST is incorporated

2024-12-05

From now on, development and maintenance of Belenios will be done by the VCAST company, co-founded by Stéphane Glondu (the main Belenios developer). VCAST was created to provide professional services around the software. VCAST offers hosting, support, customization, and development services for organizations that need a secure and verifiable online voting system.

The company’s mission is to ensure the long-term sustainability of Belenios while remaining faithful to its core principles: verifiability, privacy, and transparency.

You can learn more on the VCAST website (only in French for now, sorry... we do speak English, though). Feel free to reach out if you have any questions or need support!

The academic platform continues to exist indendently from VCAST.