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U-Prove Extensions SDK

The U-Prove Extensions SDK implements extensions to the U-Prove Cryptographic Specification [1], and is a companion to the U-Prove C# SDK [2].


Date Published19 June 2014
Download Size0.46 MB

Note By installing, copying, or otherwise using this software, you agree to be bound by the terms of its license. Read the license.

The U-Prove Extensions SDK contains the following extensions:

o ID Escrow: allows an Auditor to de-anonymize a fraudulent user by decrypting a user-provided verifiably-encrypted identity.

o Accumulator designated-verifier revocation: provides efficient constant-size and time revocation.

o Collaborative issuance: allows the issuance of attributes unknown to the Issuer, which can be copied from another token.

o PolyProof: provides more flexible proof types, allowing a user to prove that an undisclosed attribute is part of a set, part of an interval, is equal to another undisclosed value (which could be an attribute from a different token), or is not equal to a target value.

For more information about the extensions and the U-Prove technology, please visit