5.5 Discovery and Registration

To perform a federation transaction with a subscriber-controlled wallet, the RP SHALL first determine the attribute bundle verification key of the CSP through a secure process as stated by the trust agreement. In some systems, this is accomplished by retrieving the CSP’s attribute bundle verification keys from a URL that is known to be controlled by the CSP. In other systems, the RP is configured manually with the verification keys of the CSP before being deployed. In systems governed by multi-lateral trust agreements, this process can be facilitated by a third-party discovery and registration service, such as one provided by a federation authority.

The signed attribute bundle includes the CSP that issued the bundle and one or more verification keys that are associated with the subscriber-controlled wallet. Since the RP trusts the CSP’s process of issuing attribute bundles to subscriber-controlled wallets, the RP can trust the presentation of those bundles that are made using proof of one of the subscriber-controlled wallet’s signing keys.

In many cases, the process of the RP registering with the subscriber-controlled wallet is expected to be a dynamic process in which the RP exchanges its keys and metadata with the IdP during the federation transaction. The nature of a subscriber-controlled wallet makes it difficult for any specific RP to pre-register with an instance of the wallet, but this can be facilitated through the use of a trusted third party that is stipulated in the trust agreement.

Parties that seek to federate MAY use a trusted third party to facilitate the discovery and registration processes if that trusted third party is identified in the trust agreement. For example, consider an ecosystem has a centralized service for managing discovery and registration. When an RP joins the ecosystem, it registers itself with the trusted service, downloads the CSP’s verification keys, and receives an identifier to use with wallets. When the CSP issues attribute bundles to the subscriber-controlled wallet, the subscriber-controlled wallet is informed where it can find the list of valid RP identifiers within the ecosystem. When the RP connects to the wallet, the wallet can verify the RP’s identifier without the RP having to register itself directly with the wallet. Likewise, the RP can trust the wallet’s verification keys by verifying the CSP’s signature over the wallet’s verification keys or identifier.

1. Resumen

1.1 Referencias

1.2 Requisitos identificados

1.3 Regulaciones relacionadas

2. Requisitos identificados

3. Regulaciones relacionadas

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