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U-Prove
Original author(s)	Credentica
Developer(s)	Microsoft
Repository	github.com/Microsoft/uprove-csharp-sdk
Written in	C#, JavaScript
Platform	Cross-platform
Type	Identity management
License	Apache License 2.0
Website	www.credentica.com

U-Prove is a free and open-source^[1] technology and accompanying software development kit^[2] for user-centric identity management. The underlying cryptographic protocols were designed by Dr. Stefan Brands^[3] and further developed by Credentica and, subsequently, Microsoft.^[4] The technology was developed to allow internet users to disclose only the minimum amount of personal data when making electronic transactions as a way to reduce the likelihood of privacy violations.^[5]

Overview

U-Prove enables application developers to reconcile seemingly conflicting security and privacy objectives (including anonymity), and allows for digital identity claims to be efficiently tied to the use of tamper-resistant devices such as smart cards. Application areas of particular interest include cross-domain enterprise identity and access management, e-government SSO and data sharing, electronic health records, anonymous electronic voting, policy-based digital rights management, social networking data portability, and electronic payments.

In 2008, Microsoft committed to opening up the U-Prove technology.^[1] As the first step, in March 2010 the company released a cryptographic specification and open-source API implementation code for part of the U-Prove technology as a Community Technology Preview under Microsoft's Open Specification Promise.^[6] Since then, several extensions have been released under the same terms and the technology has been tested in real-life applications.

In 2010, the International Association of Privacy Professionals (IAPP) honored U-Prove with the 2010 Privacy Innovation Award for Technology.^[7]^[8]

Microsoft also won the in European Identity Award in the Best Innovation category for U-Prove at the European Identity Conference 2010.^[9]

The U-Prove Crypto SDK for C# is licensed under Apache License 2.0 and the source code is available on GitHub.^[10]

Microsoft also provides a JavaScript SDK that implements the client-side of the U-Prove Cryptographic Specification.^[11]