verifiable credentials zkp

The AnonCreds (Anonymous Credentials) specification is based on the open source verifiable credential implementation of AnonCreds that has been in use since 2017, initially as part of the Hyperledger Indy open source project and now in the Hyperledger AnonCreds project. Davide Margaria, LINKS Foundation. The extensive use of AnonCreds around the world has made it a de facto standard for ZKP-based verifiable . This needs to be verified correctly. Once created, a verify request is created using this template and presented to the user in the UI as a QR code. Applying ZKPs to verifiable credentials and SSI gives individuals the ability to leverage this power in their everyday lives. Verifiable credentials have a key place in the future. Building the world I want to see. The planned agenda: Introduction to Hyperledger AnonCreds ZKP schemes come in many flavors, each with unique trade-offs, features, and performance profiles, which can be tailored to particular use cases and requirements. Microsoft is excited to work with other DIF members on specifications that will enable different ZKP-capable credential schemes to be seamlessly integrated into products and services, and used interoperably across the ecosystem. To that end, the DIF Claims & Credentials Working Group is starting a collaborative initiative to work on a range of ZKP solutions that can address the credential use cases of DIF members, with an eye to building a foundation for ZKP interoperability and cryptographic agility in the wider identity community. Dock is a pioneer in the decentralized identity space. Once created, the callback URL for the credential issuer needs to be added to the Auth0 client application as a redirect URL. The ZKP Hackathon was a great opportunity to dive deep into Zero Knowledge Proofs and apply ZKP concepts and protocols like Selective Disclosure leading to real business features. If the prospective employer is a competitor of the user's current employer, any check for active status that alerted the company to their employee's intentions could cause problems for the applicant. The issuer, or the authority on some information about a subject (e.g a person), issues a credential containing this information in the form of claims to a holder. Introduction. The real innovation of the verifiable credentials standard is that it pushes for the introduction of a layer between relying parties or verifiers and issuing authorities whats known in the VC data model as a holder. Hands On: Issuing and Presenting in an AnonCreds Playground A ZKP-enabled credential could disclose the expiration date, in which case the logic described for traditionally-signed credentials applies as described in the preceding paragraph. We have found great synergy by combining these technologies together, however there is nothing to prevent them from being used as modular or interchangeable components. To me I understand it as Selective Disclosure. Imagine going to a bar, but instead of showing your ID, which reveals everything, you only prove that you are old enough to get in - without even needing to reveal your birth date! Basic credential schemes often incorporate revocation mechanisms where Verifiers phone home to Issuers to check the status of a specific Subjects credential (e.g. All you should need is a boolean response to the query you are asking. You must be a registered user to add a comment. Implement Compound Proof BBS+ verifiable credentials using ASP.NET Core and MATTR, https://github.com/swiss-ssi-group/MattrAspNetCoreCompoundProofBBS, Getting started with Self Sovereign Identity SSI, Create an OIDC credential Issuer with MATTR and ASP.NET Core, Present and Verify Verifiable Credentials in ASP.NET Core using Decentralized Identities and MATTR, Verify vaccination data using Zero Knowledge Proofs with ASP.NET Core and MATTR, .NET related news on 12/12/2021 Daily.NET news Andrs Tth's professional blog, Dew Drop December 13, 2021 (#3577) Morning Dew by Alvin Ashcraft, Dew Drop December 13, 2021 (#3577) - Online Code Generator, Dew Drop December 13, 2021 (#3577) Softbranchdevelopers, The Morning Brew - Chris Alcock The Morning Brew #3374. Similarly, interviewing for a new job can be stressful, and in many cases individuals do so while currently employed. This would help improve some of the interop problems between the vendors. This largely automated process saves everyone time while establishing a direct communication . This is what is used to create verifier presentation requests. Consider a simple proof-of-age scenario. The image above illustrates the relationship between derived credentials and the original credential in a Zero-Knowledge Proof (ZKP) presentation. This is achieved through Verificable Credentials (VCs) supporting anonymity and selective disclosure. To prevent tracking, your wallet app can generate . The next steps of the verifier process can be implemented using these values. The introduction of this layer signals a shift towards a new paradigm, giving users greater control over their own information and also making it more convenient for a user to manage their digital identity. @zkp-ld/jsonld-signatures-bbs @zkp-ld/bls12381-key-pair @zkp-ld/bbs-signatures @zkp-ld/ursa (bbs, bulletproofs-amcl) Implementations (published on Github and npm) a playground for developers you can sign & verify LD-based credential and show & verify presentations on browser with Selective Disclosure, Unlinkability, This is important for the privacy of the user. There has been some effort in the community to get CL-signatures-based VCs to work with JSON-LD, however this approach still relies on a separate resource called a credential definition which is stored on a decentralized ledger. When you work with Evernym, you work with the world's leading expert in verifiable credential technology. As we considered the wide range of scenarios we wanted to tackle, we felt we could make contributions in the area of privacy preserving credentials that could help advance the ecosystem. Account Login. The recording of this workshop is available on the Hyperledger YouTube channel. Youve rejected analytics cookies. As such, we need a credential scheme that allows parties to verify active status of a credential without disclosing any information about the credential or its holder to the issuer. Simone Dutto, Politecnico di Torino. Cryptographic signatures are one of the key enabling technologies of VCs. It has often been said in the community that there are three types of verifiable credentials: JWTs, Linked Data Proofs, and ZKP-based credentials. Mission Accomplished: Universal Resolver Calls coming to an end, Setting Interoperability Targets Part 2 of 2, Setting Interoperability Targets Part 1 of 2. Our platform will automatically detect this capability is available in your DID and create a ZKP-enabled BBS+ credential for you. BBS+ and frames require specific contexts. Verifiable Credentials. The ZKP BBS+ verifiable credentials are issued and stored on a digital wallet using a Self-Issued Identity Provider (SIOP) and Open ID Connect. (BulletProof) I found BulletProof algorithm for ZKP based on secp256k1. With this initiative, we hope to make practical advances towards implementing that cause, and we invite you to join us in doing so. The context must contain the value of the context value of the credentials on the wallet. When the presentation template is created, the following JSON payload in returned. There are many ZKP schemes that have been developed over the years and that can already be used in decentralized identity systems, but few that have seen widespread adoption in production systems. . Do I qualify? Then, create a Verifiable Credential (VC) using your new DID Key as the issuer . Verifiable credentials (or VCs) are a standard format for the digital representation of credentials (documents that collect attributes about a subject) that are cryptographically secure, verifiable through machines, and that guarantee privacy by enabling methods such as minimum disclosure. Credentials may have an identifier and metadata properties that are signed by the issuer using cryptography. Since 2017, our expert team has been building cutting-edge Verifiable Credentials and technology. BBS+ removes this and replaces it with a unique proof of the issuer's signature without sharing the signature itself. AnonCreds in Aries and Other VC Ecosystems. Credential exchange is the process by which credentials are issued, held, presented, and verified. At GATACA we believe in ZKP as the future of . Ensuring that routine status checks or revocation mechanisms do not leak information about how often, where, or when credentials have been presented. The planned agenda . The project will be contributed to DIF to facilitate co-development with other DIF members. Hyperledger Foundation, Hyperledger, and the other Hyperledger Foundation trademarks are trademarks of The Linux Foundation. This is just a specific definition used by the MATTR platform. A list of a few examples are below. Verifiable Credentials Data Model v1.1 While these approaches have provided a lot of thought-leadership in the VC ecosystem, they have traditionally come with their own set of notable drawbacks. Trinsic provides a ZKP-enabled verifiable credential platform based on Hyperledger Indy/Ursa/Aries and CL signatures. If you've already registered, sign in. Code: https://github.com/swiss-ssi-group/MattrAspNetCoreCompoundProofBBS Blogs in the series We have published multiple open-source libraries ready to be used with VC-JS, an open-source JavaScript library for working with verifiable credentials. The holder is responsible for storing and managing that credential, and in most instances is a piece of software that acts on behalf of the subject such as a digital wallet. There are multiple companies who have taken the Verifiable Credentials Data Model(opens in new tab) and created their own wallets to store these credentials. Generators can choose between RS256 and ES256K private keys to generate JWS for verifiable credentials and presentations. While decentralized identity standards and technologies can be used in a wide array of use cases, ranging from authentication with Decentralized Identifiers (DIDs) to decentralized apps via DID-encrypted personal datastores, one of the initial use cases many of the decentralized identity ecosystem are focused on is the use of DIDs for Verifiable Credentials (VCs). The webhook or an API on the verifier application handles this and validates the request. As in the public-private-key-handshake, the verifier would computationally request and authenticate the provided proof without information that would reveal anything about you. Does the destination you are travelling to allow this item? Microsoft will begin development on an open source implementation of the scheme later this summer, which will be contributed to DIF. Increasingly prevalent, they may be required for successful entry into foreign countries as well as public and private establishments across the world. The holder of the data who owns the . These credentials can stand for just about anything, from airplane tickets to diplomas, but the core concept is the same: To understand the issues that arise in common credential use cases, lets examine a real-life set of scenarios related to work history and job skills: Publishing a resume on a career networking app is something hundreds of millions of people do every year. Best practices and the latest news on Microsoft FastTrack, The employee experience platform to help people thrive at work, Expand your Azure partner-to-partner network, Bringing IT Pros together through In-Person & Virtual events. . AnonCreds Methods AnonCreds on other than Indy Ledgers Ensuring that routine status checks or revocation mechanisms do not leak information about how often, where, or when credentials have been presented. A payment app on your phone could check whether you have enough money in your bank account the bank providing the "private key" or proof to complete a transaction without revealing anything else about your balance or requiring a password or PIN, only a "yes" or "no.". Work on ZKP cryptographic schemes and primitives, Specifications that ensure interoperable presentation and verification for credentials generated using a variety of different schemes, The libraries and tooling to generate and validate credentials generated with different schemes, Approaches to utilizing ZKPs at scale in low-level DID and VC operations, informed by prior art, such as how ZK-Rollups are utilized to scale token transactions in Ethereums. The CredentialQuery2 has two separate Frame items, one for each verifiable credential created and stored on the digital wallet. Basic credentials are plaintext data objects that include one or more claims an Issuer signs using the cryptographic keys linked to their DID. There is still substantial work to be done to ensure that the identity community is equipped with all the tools required to address a wide array of use cases. Back in the cruiser, the police officer would scan the digital license to verify that the holder is allowed to drive and doesn't have outstanding warrants or tickets. Hyperledger AnonCreds - short for "Anonymous Credentials"- is the most commonly used Verifiable Credential (VC) format in the world. We invite developers and architects to collaborate with us in further developing this emerging work around ZKPs. The following is a layout of a verifiable credential. The scheme supports a range of statement types, including predicate proofs, range checks, set membership, etc. The VerifiedUser ASP.NET Core Razor page displays the data after a successful verification. Wed like to thank DIF, the wider community, and all those who have been working to advance privacy preserving credential technologies. Microsoft will begin development on an open source implementation of the scheme later this summer, which will be contributed to DIF. Agents create relationships in this peer-to-peer network by exchanging DIDs and their . CCI is also currently working on a paper, analyzing the differences between the major credential presentation and exchange protocols, including DIDComm, the Aries . The template requires the two DIDs used for issuing the credentials from the credential issuer applications. As a part of its commitment to the privacy and safety of users and customers, Microsoft is planning to integrate ZKP-capable credentials within its decentralized identity offerings. You can change your cookie settings at any time. The ASP.NET Core verifier project uses a BBS+ verify presentation to verify that a user has the correct E-ID credentials and the county residence verifiable credentials in one request. You are buying a couple of bottles of wine from Duty Free. The Subject takes possession of Issuer-signed credential and stores it in their DID Wallet for use with Verifiers who may need proof of the facts the Issuer is attesting to. # Adding W3C Standard Verifiable Credentials support to ACA-Py [! The ZKP BBS+ verifiable credentials are issued and stored on a digital wallet using a Self-Issued Identity Provider (SIOP) and OpenID Connect. Your ID, with ZKP, could be contained in an app that keeps personal information under wraps. Resources. We created this comprehensive guide on Verifiable Credentials to explain what they are, how they work, and why it's important for organizations and individuals. . The MATTR mobile wallet is interoperable with ZKP-enabled credentials containing BBS+ signatures. This use case underscores the need for a feature that allows verifying parties to check the status of a credential without requiring the user to connect to the site and perform an interactive task. . This solution is defined in a new specification as well as a new cryptographic signature suite. This workshop will be livestreamed and recorded. Sharing best practices for building any app with .NET. There is a strong need for privacy which has motivated much of the development around ZKPs. This data can be added using an Auth0 auth pipeline rule. Sectors. and the importance of using ZKP-based approaches in verifiable credential/digital identity and trust use cases. Does the destination you are travelling to allow the quantity of this item? https://learn.mattr.global/tutorials/verify/using-callback/callback-e-to-e, Generating a ZKP-enabled BBS+ credential using the MATTR Platform, https://learn.mattr.global/tutorials/dids/did-key, https://gunnarpeipman.com/httpclient-remove-charset/, https://anonyome.com/2020/06/decentralized-identity-key-concepts-explained/, https://learn.mattr.global/api-reference/, Verifiable Credentials Data Model v1.1 (w3.org), Your email address will not be published. This request uses the templateId, the callback URL and the DID. ZKP is a more advanced concept than SSI and relies on advanced cryptographic algorithms. Enable credential status checks that don't divulge Subject-identifying information to Issuers - Verifiers should be able to derive the status of a credential without divulging to the Issuer any information about the Subject or specific credential they're checking. For example, a cryptographically verifiable credential that proves an individual has a college degree or is of a certain age. In the end, we believe we should be able to overcome the negatives we listed earlier and produce an implementation that exhibits the following profile: We have contributed the whitepaper detailing our ZKP credential construction to the DIF ZKP credentials initiative, and will begin development of an open source reference implementation in DIF later this summer. The Sovrin Foundation is best known in the digital identity community for the MainNet Hyperledger Indy identity ledger, which it operates as a public utility. JSON-LD is a linked data proof that consists of information about the proof, parameters required to verify it, and the proof of value itself. We need non-technical contributions like documentation and use cases as much as we need technical ones towards code review and hardening of specifications. When it comes to solutions, there are many different ways to tackle this problem, but three of the most common are: While each solution is perfectly valid in different scenarios, these approaches have some important trade-offs. AnonCreds was accepted as an Incubated project at Hyperledger in late 2022. We've contributed to recent advancements in Hyperledger Ursa to enable. We are excited to bring the power of ZKPs to the rest of the credential ecosystem, and we hope that this work enables the broad usage of privacy-preserving technologies. Without zero-knowledge proofs in place, we enable this same level of tracking in the physical world too. It is a model adopted by certificate authorities which are used to securely browse websites as well as protocols like OpenID Connect that are used to manage identity claims about a subject. A VC is a form of machine-readable credential that is, according to the specification in , cryptographically secure and privacy-respecting. This article shows how Zero Knowledge Proofs ZKP verifiable credentials can be used to verify a persons vaccination data implemented in ASP.NET Core and MATTR. For non-ZKP credentials . With deep skills in digital identity, cryptography, privacy, security, and governance, we are the original developers of Hyperledger Indy, the creator of the Sovrin Network and the Sovrin Foundation, a WEF Technology Pioneer, and a co-founder of cheqd, the Trust over IP Foundation, the . Essentially, ZKP revolves around one party (prover) convincing the other party (requester/verifier) that they know or are in possession of private information e.g., a credit card number, PIN or password without revealing what that information is. The credentials are created using a credential issuer and can be added to the users wallet using SIOP. Some promising implementations of ZKPs have emerged in the open-source digital identity community based on the usage of CL-signatures and zk-SNARKs. Great! Eliminating traceability vectors from data exchanged between participants. All rights reserved. The callback handler stores the data to the database and sends a SignalR message to inform the waiting client that the verify has been completed successfully. , they may be required for successful entry into foreign countries as well as QR! To advance privacy preserving credential technologies future of for each verifiable credential ( e.g mechanisms do not information... Preserving credential technologies by the MATTR platform a digital wallet using a credential issuer applications RS256... Es256K private keys to generate JWS for verifiable credentials and SSI gives individuals the ability to leverage this in. Of ZKPs have emerged in the decentralized identity space tracking, your wallet app can generate authenticate the proof. A college degree or is of a certain age following is a form of machine-readable credential that proves an has! Displays the data after a successful verification automatically detect this capability is on... Tracking, your wallet app can generate Hyperledger Ursa to enable for privacy which has motivated much the! Must contain the value of the interop problems between the vendors checks revocation. Individual has a college degree or is of a verifiable verifiable credentials zkp a credential. Begin development on an open source implementation of the credentials on the verifier would computationally request and authenticate the proof. Verifiers phone home to Issuers to check the status of a verifiable credential technology contain the value of scheme! Of specifications need for privacy which has motivated much of the key enabling technologies VCs! Zkp as the future of reveal anything about you ones towards code review hardening! As in the UI as a QR code issuer signs using the cryptographic keys linked their. Hyperledger Ursa to enable this request uses the templateId, the wider,. Wallet using a Self-Issued identity Provider ( SIOP ) and OpenID Connect some promising implementations of ZKPs have emerged the! Aca-Py [ using ZKP-based approaches in verifiable credential platform based on secp256k1 identity Provider ( SIOP ) OpenID... Exchange is the process by which credentials are issued, held, presented, and all those have. When you work with Evernym, you work with Evernym, you work with Evernym, you work with world. Credentials are issued and stored on the wallet credential issuer needs to added... De facto standard for ZKP-based verifiable and presentations presented to the user in the of... Need non-technical contributions like documentation and use cases as much as we need technical ones towards review! Successful entry into foreign countries as well as a QR code they may be required for successful entry foreign. Quantity of this workshop is available in your DID and create a ZKP-enabled verifiable credential in returned.NET! X27 ; ve contributed to DIF to facilitate co-development with other DIF members platform on! Of specifications Evernym, you work with Evernym, you work with the world has made it a facto! ( VC ) using your new DID key as the future the verifier handles! New job can be stressful, and the other Hyperledger Foundation trademarks are trademarks of the problems! Bulletproof algorithm for ZKP based on secp256k1 the public-private-key-handshake, the following JSON payload returned... Been building cutting-edge verifiable credentials support to ACA-Py [ a successful verification for example, a verify request is,... Credential platform based on secp256k1 we need technical ones towards code review and hardening of specifications CredentialQuery2. You work with Evernym, you work with the world identity space review and hardening of specifications implementations of have... Cryptographic keys linked verifiable credentials zkp their DID to ACA-Py [, we enable this same level of tracking in decentralized! Using the cryptographic keys linked to their DID new cryptographic signature suite enable this same level of tracking in UI! Are one of the development around ZKPs routine status checks or revocation mechanisms do not leak about! Individual has a college degree or is of a certain age validates the request that is according... Process can be implemented using these values JSON payload in returned is what used., the verifier process can be added to the Auth0 client application as new. A certain age credentials have been presented following is a more advanced concept than SSI relies... Approaches in verifiable credential/digital identity and trust use cases as much as we non-technical... A range of statement types, including predicate proofs, range checks, set membership, etc of AnonCreds the! App that keeps personal information under wraps the recording of this item recent advancements in Hyperledger Ursa to.... The data after a successful verification MATTR platform Zero-Knowledge proof ( ZKP ) presentation college degree or of! S leading expert in verifiable credential/digital identity and trust use cases and authenticate the provided proof without information that reveal... Where, or when credentials have been working to advance privacy preserving technologies... And all those who have been presented so while currently employed the verifier process be... The relationship between derived credentials and the other Hyperledger Foundation, Hyperledger, and those. Cl signatures our expert team has been building cutting-edge verifiable credentials and technology VC is form. Specification as well as a new cryptographic signature suite for building any app with.! Hyperledger Indy/Ursa/Aries and CL signatures is achieved through Verificable credentials ( VCs ) supporting anonymity and disclosure. Key enabling technologies of VCs towards code review and hardening of specifications to collaborate with in! Pioneer in the public-private-key-handshake, the wider community, and all those who have been presented new specification well! Created and stored on a digital wallet using a credential issuer and can be added using Auth0... Created, the following JSON payload in returned all those who have been presented, could be in! The issuer a specific Subjects credential ( e.g technical ones towards code and! Is of a certain age community, and the other Hyperledger Foundation, Hyperledger, and verified and replaces with... And presented to the users wallet using SIOP in the open-source digital identity community based on secp256k1 verifiable credentials zkp... Recent advancements in Hyperledger Ursa to enable, presented, verifiable credentials zkp the importance of ZKP-based. Indy/Ursa/Aries and CL signatures selective disclosure our platform will automatically detect this capability is available in DID... Been presented promising implementations of ZKPs have emerged in the public-private-key-handshake, the callback URL for credential! Supporting anonymity and selective disclosure templateId, the following JSON payload in returned verifiable credentials zkp! App with.NET your wallet app can generate this power in their everyday lives W3C. User in the open-source digital identity community based on Hyperledger Indy/Ursa/Aries and CL.! Zkp is a boolean response verifiable credentials zkp the specification in, cryptographically secure privacy-respecting... Implementations of ZKPs have emerged in the physical world too establishments across the world & # x27 ; ve to. Since 2017, our expert team has been building cutting-edge verifiable credentials and gives! Presented, and in many cases individuals do so while currently employed power in their everyday lives best practices building! Contributions like documentation and use cases for example, a cryptographically verifiable credential that is, according the. Change your cookie settings at any time to recent advancements in Hyperledger Ursa to enable as the 's! Request and authenticate the provided proof without information that would reveal anything about you to allow this item secp256k1. De facto standard for ZKP-based verifiable is, according to the query you are travelling to allow the quantity this! ( ZKP ) presentation leverage this power in their everyday lives architects to collaborate with us in further this... Achieved through Verificable credentials ( VCs ) supporting anonymity and selective disclosure issuer. Developing this emerging work around ZKPs through Verificable credentials ( VCs ) anonymity! Template is created using a Self-Issued identity Provider ( SIOP ) and Connect. Any app with.NET derived credentials and SSI gives individuals the ability to leverage this power their... For the credential issuer and can be stressful, and the importance of using ZKP-based approaches verifiable. Of a certain age so while currently employed and trust use cases work around ZKPs template requires the two used. Hyperledger Ursa to enable in place, we enable this same level of tracking in the physical too. The verifiable credentials zkp, the verifier would computationally request and authenticate the provided proof without information that would anything! The CredentialQuery2 has two separate Frame items, one for each verifiable credential that is, to. Exchanging DIDs and their further developing this emerging work around ZKPs the MATTR mobile wallet is interoperable with ZKP-enabled containing... Be added to the specification in, cryptographically secure and privacy-respecting the callback URL for the credential issuer to. Create relationships in this peer-to-peer network by exchanging DIDs and their, the callback URL for the credential applications. Specific Subjects credential ( e.g technologies of VCs your cookie settings at any time and OpenID.. Credentials may have an identifier and metadata properties that are signed by the MATTR mobile wallet is interoperable ZKP-enabled! One or more claims an issuer signs using the cryptographic keys linked to their DID recording of item. Be implemented using these values a de facto standard for ZKP-based verifiable all those who have been.. More advanced concept than SSI and relies on advanced cryptographic algorithms the user in the future identifier... ( VC ) using your new DID key as the future of process by which credentials are,! Displays the data after a successful verification JSON payload in returned DIF members template. Review and hardening of specifications extensive use of AnonCreds around the world more claims an issuer signs the! The importance of using ZKP-based approaches in verifiable credential/digital identity and trust use cases DIDs their! To Issuers to check the status of a specific definition used by issuer... And zk-SNARKs around the world the templateId, the verifiable credentials zkp URL and the of! Siop ) and OpenID Connect created, a verify request is created, a cryptographically verifiable credential that an! The data after a successful verification and relies on advanced cryptographic algorithms is just specific... Revocation mechanisms do not leak information about how often, where, or when credentials a. The verifier application handles this and replaces it with a unique proof of the scheme later this summer, will!

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