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UID:pretalx-matrix-conf-2025-X3KDAQ@cfp.2025.matrix.org
DTSTART;TZID=CET:20251017T111000
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DESCRIPTION:Access control is the core of any system's security\, but usual
 ly provided by a single\, centralized server. However\, access control in 
 a Matrix room is decentralized: every participating server *independently*
  decides *who* is authorized to send and receive *which* events\, without 
 consulting any other server. To the surprise of many\, these decisions are
  still *eventually* consistent even if all but one server is malicious\, b
 ut seeing *why* requires a new way of thinking about access control. I wil
 l explain  the necessary design patterns from decentralized systems scienc
 e\, and show how they can be weaved together for a practical explanation o
 f what Matrix is\, and why Matrix can reach its astonishing levels of secu
 rity and resilience.
DTSTAMP:20260521T143406Z
LOCATION:Alan Turing
SUMMARY:Eventually Consistent Access Control: Practical Insights on Matrix 
 from Decentralized Systems Theory - Florian Jacob\, Hannes Hartenstein
URL:https://cfp.2025.matrix.org/matrix-conf-2025/talk/X3KDAQ/
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