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Formalizing Dependence of Web Infrastructure#

SIGCOMM 2025 digest Program Adjacent pick Coimbra · 8–11 September 2025

Abstract Paper Recording

Rumaisa Habib, Kimberly Ruth, Gautam Akiwate, Zakir Durumeric (Stanford)

Play the recording: Formalizing Dependence of Web Infrastructure

Why: Relevant to identity/PKI via the CA-dependence lens and to resilience reasoning generally.

What: A rigorous statistical metric for Internet centralization that disentangles centralization from regionalization across hosting, DNS, and CAs in 150 countries.

How: A suite of statistical tools applied across three web-infrastructure layers.

Where applicable: General measurement/policy toolkit. (Note: the program text for "Hummingbird: Fast, Flexible, and Fair Inter-Domain Bandwidth Reservations" is an identical copy of this centralization abstract — Hummingbird's title is about bandwidth reservations, so its abstract appears mis-pasted in the program; flagging rather than guessing its content.)