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How to issue a Central Bank Digital Currency


We are happy to announce the publication of our paper on "How to Issue a Central Bank Digital Currency" by the Swiss National Bank.

RFC 8905 - "The 'payto' URI Scheme for Payments" published


We are happy to announce the publication of RFC 8905 by the IETF.

Talk about GNU Taler in Valencia


Javier Sepúlveda will give a talk in Spanish about GNU Taler at Valencia at an event organized by the GNU/Linux group from Valencia, which is a public organization supported by the Valencia City Hall to promote urban innovation and entrepreneurship.

GNU Taler launched at Bern University of Applied Sciences


The GNU Taler payment system was launched at the Bern University of Applied Sciences in the presence of a representative of the Swiss National Bank. Students, staff, faculty and visitors can visit the cafeteria at Höheweg 80 to withdraw the electronic equivalent of Swiss Franks (CHF) onto Taler Wallet App running on their mobile phones and pay at a Taler-enabled snack machine. The system is expected to expand to allow payments at other places in the future. Various faculty members and students are involved various aspects of the project. Students interested in working on projects or theses related to the subject should contact Prof. Grothoff.

Exchange independent security audit report published


We received a grant from NLnet foundation to pay for an external security audit of the GNU Taler exchange cryptography, code and documentation. CodeBlau now concluded their audit. You can find the final report here. We have compiled a preliminary response detailing what changes we have already made and which changes we are still planning to make in the future. We thank CodeBlau for their work, and NLnet and the European Commission's Horizion 2020 NGI initiative for funding this work.

Exchange ready for external security audit


We received a grant from NLnet foundation to pay for an external security audit of the GNU Taler exchange cryptography, code and documentation. We spent the last four months preparing the code, closing almost all of the known issues, performing static analysis, fixing compiler warnings, improving test code coverage, fuzzing, benchmarking, and reading the code line-by-line. Now, we are now ready to start the external audit. This April, CodeBlau will review the code in the Master branch tagged CodeBlau-NGI-2019 and we will of course make their report available in full once it is complete. Thanks to NLnet and the European Commission's Horizion 2020 NGI initiative for funding this work.

GNU Taler v0.7.0 released


We are happy to announce the release of GNU Taler v0.7.0.

GNU Taler v0.6.0 released


We are happy to announce the release of GNU Taler v0.6.0.

GNU Taler v0.5.0 released


We are happy to announce the release of GNU Taler v0.5.0. The main new feature is customer tipping, which allows merchants to pay small rewards directly into a customer's wallet. Technical improvements include numerous performance improvements and bug fixes, as well as a new, simpler to use API for merchants that also enables the implementation of GNU Taler wallets on platforms that do not support WebExtensions.

GNU Taler v0.4.0 released


We are happy to announce the release GNU Taler v0.4.0 with support for customer refunds, protocol versioning, incremental key material download, returning funds from the wallet directly back into one's bank account, and various other minor improvements. The Chrome and Chromium wallets are available for download via the App store. The exchange, merchant backend and bank components are on the GNU FTP mirrors. Note that the Firefox wallet will take a few more days to become available in the App store due to the Mozilla review process.

We explain GNU Taler at SHA 2017



Sva explains GNU Taler at EasterHegg and Torsten demonstrates it is child's play



Sva explains GNU Taler at FOSSASIA in Singapore



Florian Dold explains Taler at 50p in Bangalore



Taler Documentation pages updated


docs.taler.net is now online, providing a new portal to the Taler system documentation.

Christian Grothoff explains Taler at hasgeek in Bangalore



Taler Wallet for Firefox online


We now have a first version of the Taler wallet for Firefox. For now, a development build of Firefox is required. Installation instructions are on the Wallet page.

Taler Web Payments paper published


We just finished the camera-ready version of our paper on how to use Taler for Web payments. This paper does not discuss the cryptography behind Taler, but focuses on the practical aspects of how the wallet and the merchants interact over the Web. Hence, this paper should be a good read for anyone who wants to integrate Taler support with their Web site. We have posted the paper here.

Taler Systems S.A. created


We now have a business entity for Taler. Potential investors may contact the executive team at clevel@taler.net.

GNU Taler 0.0.0 released


We have reached our first big milestone, the 0.0.0 release! The release includes implementations of a bank, exchange, merchant and wallet and is available on the GNU FTP mirrors.

Taler Demo for Chrome/Chromium online


We finally have a first simple demo for Taler online. The Firefox-variant still needs some love, but you can start to try out the demo using the Chrome/Chromium browser at demo.taler.net. Please provide feedback to our bug tracker.

Christian Grothoff explains the goals behind Taler



Taler becomes an official GNU package


Taler was accepted into the GNU project today. GNU will offer advice, advocacy and cooperation --- and host our official public mailinglist taler@gnu.org.

Watch Christian Grothoff's FOSSA talk on Taler



Launching taler.net


Welcome to our new site about the Taler electronic payment system.