Abstract: The disclosed technology teaches delegating authorization to access a resource server contingent upon group membership confirmation by a third-party identity management provider. As part of the technology, a client obtains a Macaroon Access Token with a third-party caveat that requires the client to obtain a one-time Discharge Macaroon Authorization from a third-party authority, and identifies both user group membership that needs to be checked, and a hint how to find the third-party authority. The client provides the Macaroon Access Token to the third-party authority. The client obtains, from the third-party authority, a Discharge Macaroon Access Token that identifies user group membership, and sends the Macaroon Access Token and the Discharge Macaroon Authorization to the resource server as proof of authorization.

Abstract: The disclosed technology teaches providing limited usage of a first device that includes local resources for verifying authenticity of a Macaroon access token with caveats (MATwC), a unique key and a local proximity interface. A second device used by the service technician receives the MATwC, establishes a connection with the first device over the local proximity interface using the MATwC, and sends a request to enter limited usage mode. The MATwC originated with an authentication server as a MAT, using the unique key of the first device and modified by appending caveats that narrowed authorization provided by the MAT with the limited usage mode, and applied a message authentication code chaining algorithm to sign a resulting the MATwC. The first device performs local authentication of the MATwC, evaluating the appended caveats and enters the limited usage mode consistent with the appended caveats, without requiring connected resources to authenticate the MATwC.

Abstract: The disclosed technology teaches confirming proper deployment of sensors, with an authorization server (AS) issuing to a first client a Macaroon access token (MAT), optionally with caveats, including a root signature, and providing the MAT to a client. The client modifies the MAT to produce multiple instances by appending caveats that add a deployment location to each of the instances, and applies a message authentication code (MAC) chaining algorithm to generate updated signatures to include in the instances of a MAT with caveats (MATwC). The first client forwards the multiple instances of the MATwC to respective sensor instances, and a second client receives, from the sensor instances, sensed data and location indicative data, accompanied by respective MATwC instances. The second client verifies that the location indicative data is consistent with the deployment location caveat in the respective MATwC and utilizes instances of the sensed data that are verified as consistent.

Abstract: The disclosed technology teaches confirming delegation of authorization from an authorization server (AS) by a client to a service, including an AS issuing an OAuth2 access token in the form of a Macaroon (MAT), optionally with caveats, including a root signature, and providing the MAT to a client. Included is the client modifying the OA2 access token by appending caveats that narrow authorization, and by applying a message authentication code (MAC) chaining algorithm to generate an updated signature to include in the resulting MAT with caveats (MATwC), the client delegating authorization to a service by forwarding the MATwC to the service and the service using the MATwC to access a resource server (RS), the RS passing the MATwC to the AS, and the AS determining authenticity of the MATwC as a bearer token and evaluating scope of authorization from the MAT as narrowed by the caveats, and reporting results.