Summary
The Canton of Basel-Stadt informed the Federal Chancellery on March 5, 2026, that electronically cast votes for the federal referendum on March 8, 2026, may not be decryptable. The problem affects an external hardware component (storage medium) of the canton, not the e-voting system itself. Approximately 10,300 Swiss abroad and 30 voters with disabilities are affected and are being asked to use alternative voting channels. The Federal Chancellery considers the measures appropriate for safeguarding the integrity of the ballot.
Persons
- Federal Chancellery (federal authority)
- Canton of Basel-Stadt (affected cantonal government)
Topics
- E-voting and digital referendums
- Federal referendums
- Cybersecurity and data integrity
- Electoral measures
Clarus Lead
A technical defect jeopardizes the counting of electronic votes in Basel-Stadt for the referendum on March 8, 2026. The problem lies with a portable storage medium that contains a key necessary for decryption – the e-voting system itself and the encrypted votes remain unaffected. For decision-makers: The Federal Chancellery has assessed the emergency measures as appropriate, but the impact on national referendum results can only be determined once all provisional results are available.
Detailed Summary
The State Chancellery of Basel-Stadt discovered during preparation work that electronically submitted votes cannot be decrypted. The cause has been narrowed down to an external hardware component – a portable storage medium containing a decryption key. The system itself and the encrypted vote data are not compromised.
The canton called on all e-voting eligible voters to cast their votes instead by mail or in person at the ballot box. A total of approximately 10,330 eligible voters are affected: primarily Swiss abroad as well as 30 persons with disabilities who rely on electronic voting. Error correction is underway. Other cantons (Thurgau, Graubünden, St. Gallen) and the Swiss Post system are unaffected. The national impact will be evaluated only after counting by all cantons is complete.
Key Points
- Hardware defect isolated: Problem limited to a storage medium in Basel-Stadt, not the e-voting system
- Emergency measures initiated: 10,300+ eligible voters are being asked to use alternative voting channels
- National integrity ensured: Other cantons and systems are unaffected; impact on federal results assessable only after all results are available
Critical Questions
Evidence: How was the storage medium defect discovered, and what technical tests confirm that the e-voting system itself is undamaged?
Data Quality: Can the encrypted votes be decrypted retroactively with a replacement key, or are these votes permanently lost?
Conflicts of Interest: Who is responsible for maintaining and checking the storage medium, and were there lapses in quality control?
Causality: Is it ruled out that the defect was caused by external interference (cyberattack, sabotage), or has this been investigated?
Feasibility: How realistic is it that 10,300+ Swiss abroad can organize alternative voting by March 8, 2026?
Risks: If not all affected eligible voters switch to alternative channels in time, how will voter participation in Basel-Stadt be affected?
Transparency: Will the results from Basel-Stadt be reported separately to keep the national referendum traceable?
Source Directory
Primary Source: Federal Referendum of March 8, 2026 – Electronically Cast Votes in Canton Basel-Stadt Possibly Not Countable – Federal Chancellery, March 6, 2026
Verification Status: ✓ March 6, 2026
This text was created with the support of an AI model. Editorial responsibility: clarus.news | Fact-checking: March 6, 2026