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Electronic payments for a liberal society!

Taler is a new electronic payment system under development at Inria. Today, this website only presents the advantages our system is expected to provide. We expect to make the payment system operational in 2017.


Unlike BitCoin or cash payments, Taler ensures that governments can learn their citizen's total income and thus collect sales, value-added or income taxes. Taler is thus a currency for the mainstream economy, and not the black market.


When you pay with Taler, your identity does not have to be revealed to the merchant. The bank, government and exchange will also never learn how you spent your electronic money. However, you can prove that you paid in court if necessary.


Taler is free software from GNU implementing an open protocol. Anybody is welcome to inspect our code and integrate our reference implementation into their applications.


Taler is designed to work on the Internet. Using a so-called RESTful protocol over HTTP or HTTPS, Taler is easy to integrate with existing Web applications.


Taler uses an electronic exchange holding financial reserves in existing currencies. This means that Taler is not a new currency with the inherent currency fluctuation risks, but instead the cryptographic coins correspond to existing currencies, such as US Dollars, Euros or even BitCoins.


Taler Web payments paper published.

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Taler technology: About taxability, change and privacy

One of the key goals of Taler is to provide anonymity for citizens buying goods and services, while ensuring that the state can observe incoming transactions to ensure businesses engage only in legal activities and do not evade taxes (such as income tax, sales tax or value-added tax). However, we also want to stay out of the immediate personal domain, so sharing funds within a family or copying coins between devices should not be subject to monitoring by the state.

As a result, Taler does not intrude into the personal economic domain, offers good privacy, taxability for transactions and the ability to give change.