DECODE gives back Data Sovereignty to Citizens

DECODE gives back Data Sovereignty to Citizens

Today’s digital economy is increasingly centralised and relies on the manipulation and commercial exploitation of personal information by very few Big Tech Giants.

DECODE provides decentralized, privacy-enhancing, rights preserving tools to give back data sovereignty to people and enable citizens’ digital rights.

DECODE proposes new Social Pact on Data: data as a common infrastructure that generates public value

DECODE enables citizens to control their data as a common good and to share them on terms that are fair, transparent and accountable. 

Explore DECODE Tools

DECODE enables a new generation of decentralised digital applications, where communities can leverage the collective value of their data. 

Secure operating system

DECODE OS is a private and anonymous peer-to-peer network for getting DECODE up and running.

Human-readable smart contracts

Zenroom is the smart contracts engine powering DECODE.

Learn more  Demo  Github

Authenticated anonymous ‘identities’

DECODE app provides anonymous authentication for digital democracy applications and can be easily customized.

Learn more  Github


Data commons dashboard

BarcelonaNow empowers citizens with interactive dashboards to explore, interpret and share urban data on their terms.

Demo  Github

Why you should use DECODE


Modular and interoperable.

DECODE tools can be combined and used as part of any platform or app.


Free and open source.

All work produced by the project is published as free and open source.


Decentralised &

In DECODE operations are processed, validated and updated on the Sawtooth ledger platform.


Privacy enhancing.

Personal data on DECODE is defined in terms of ‘Attribute-Based Credentials‘ collected and stored in a secure digital wallet.


Based on cutting edge research.

Based on the selective disclosure credential scheme ‘Coconut‘, providing full blockchain integration.

DECODE In Action: Tested with real communities to build people-first digital cities

DECODE has worked with Barcelona and Amsterdam City Councils to build prototype applications and test them in partnership with real communities.  See the tools in action below.

Digital Democracy and Data Commons (DDDC)

DECODE is integrated with the participation platform Decidim used by thousands to shape the city’s policy agenda. A new e-petition system offers people greater control, improves privacy and allows data sharing and visualization (integrating the BCNOW dashboard).

Learn more  See the platform

Citizens’ IoT Data Governance

Working with Ideas for Change and FabLab Barcelona, DECODE technology enabled Barcelona residents affected by pollution to collect and share encrypted data from environmental sensors anonymously with their communities, on their own terms.

Learn more  Set up a sensor

Anonymous Proof of ID

The City of Amsterdam prototyped a ‘Passport Box’ and mobile web app that allows users to store encrypted passport data from the RFID-chip (inside the physical passport) onto their phone, and share attributes without disclosing sensitive personal information.

Learn more  Try the proof of concept

Ethical Social Network

GebiedOnline is a community-owned, member-based platform cooperative for sharing local news, events and meeting neighbours. DECODE tested a more privacy-preserving local social network approach and offered users more granular control over the data they share.

Learn more  See the platform

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