Identity Amortization: Shared Resources and the Cost of Sybil Attacks

Reported by arXiv cs.CR (Homayoun Maleki, Nekane Sainz, Jon Legarda, Igor Santos-Grueiro)

Summary by Cyber Security News26 Oct 2026, 05:00 CET

About this summary. This is a short excerpt from the description that arXiv cs.CR published with its article. Cyber Security News did not report or verify the underlying story. Read the original: https://arxiv.org/abs/2610.32685

arXiv:2610.32685v1 Announce Type: new Abstract: Sybil defenses commonly price identities by requiring a resource for each one. When one resource can support several identities, an adversary can pay less per identity than the defense intends. We call this identity amortization: a strict reduction in the minimum cost of provisioning identities when resources may be shared, relative to provisioning each one independently.

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