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Biscuit authentication token

logo by Mathias Adam

Biscuit is a (in development) authentication token for microservices architectures with the following properties:

  • distributed authorization: any node could validate the token only with public information
  • offline delegation: a new, valid token can be created from another one by attenuating its rights, by its holder, without communicating with the issuer or the verifier
  • capabilities based: authorization in microservices should be tied to rights related to the request, instead of relying to an identity that might not make sense to the verifier
  • flexible rights managements: the token specifies a pattern based right specification and attenuation syntax taht can map to other rights management systems
  • small enough to fit anywhere (cookies, etc)

Non goals:

  • this is not a new authentication protocol. Biscuit tokens can be used as opaque tokens delivered by other systems such as OAuth
  • revocation: while tokens come with expiration dates, revocation requires external state management