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Published on 23 January 2018
Submitted on 8 August 2020
B.1 Authentication and Authorization
ActivityPub uses authentication for two purposes; first, to authenticate clients to servers, and secondly in federated implementations to authenticate servers to each other.
Unfortunately at the time of standardization, there are no strongly agreed upon mechanisms for authentication. Some possible directions for authentication are laid out in the Social Web Community Group Authentication and Authorization best practices report.