Overview
Blocktrust Identity Wallet is a browser-extension wallet for managing decentralized identifiers and verifiable credentials on Cardano, built on the Atala PRISM identity framework1. It targets users and developers who want self-sovereign identity in a familiar browser environment, allowing them to create DIDs, hold W3C credentials, and authenticate to websites without traditional usernames and passwords. The wallet is distributed as a Chromium extension compatible with Chrome, Edge, and Brave1.
The project is maintained by Blocktrust, a Germany-based team focused on Cardano identity tooling, and has received funding through multiple Project Catalyst rounds to extend the wallet across browser and mobile platforms2.
Key Features
- DID management. Users can create and control Decentralized Identifiers anchored to Cardano through a PRISM Node, which writes signed DID operations to the blockchain for tamper-evident history1.
- Verifiable credentials. The wallet supports issuing, holding, presenting, and verifying W3C JSON-JWT credentials, covering the full issuer, holder, and verifier roles needed for credential exchange1.
- DIDComm messaging. Built-in support for the DIDComm protocol enables encrypted peer-to-peer messaging and mediator-based communication between identity agents1.
- PRISM sign-in. The wallet implements PRISM Onboard and Authenticate protocols, letting users register and log in to compatible websites using DID signing keys instead of shared secrets1.
- Open-source C# and Blazor stack. The extension is a Blazor WebAssembly app written in C# on top of Blocktrust's own .NET SDK for Atala PRISM, with all source code published on GitHub3.
What to Expect
The wallet installs as a standard Chromium browser extension, sideloaded in developer mode or via the Chrome Web Store alpha release3. After install, users generate a DID, which is anchored to Cardano through a PRISM Node transaction, and then manage credentials and contacts inside the extension popup. Websites that implement PRISM sign-in can request authentication challenges that the wallet signs locally with its DID keys, removing the need for password forms.
Because the product is alpha-stage software and the dedicated repository has seen limited activity since late 2023, the experience is best suited to developers and identity researchers exploring self-sovereign identity patterns rather than production use. Users evaluating Blocktrust Identity Wallet should also review related tooling from the same team, including credential workflow and mediator components, to understand the broader identity stack it plugs into2. Independent security review has not been identified, so credential storage should be limited to test data until audit status is clarified3. Project funding history and milestone delivery can be traced through the team's Project Catalyst proposals4.
