---
id: "papers-internet-safety-with-keri-percolation-oobi"
type: "talk"
type_label: "Talks and presentations"
title: "Internet Safety with KERI: Invasion Percolation Discovery, OOBIs (Out-Of-Band-Introductions), Spanning Trust Layer"
maintainer: "Samuel M. Smith"
authors:
  - "{'name': 'Samuel M. Smith'}"
date: "2021-10"
year: 2021
reading_level: "implementer"
reading_level_label: "Implementer"
reading_level_meaning: "developers working in or against the code"
evidence: "informative"
evidence_meaning: "an author's paper, deck, tutorial or post explaining the suite"
status: "quiet"
status_meaning: "no change in six to eighteen months; still correct"
access: "public"
access_meaning: "anyone with the link"
topics:
  - "theory"
  - "infrastructure"
roles:
  - "security-architect"
  - "infrastructure-operator"
  - "researcher"
source_url: "https://github.com/SmithSamuelM/Papers/blob/master/presentations/KERI_Percolation_OOBI.web.pdf"
source_license: null
source_license_note: null
found_on: "smith-papers"
kerisse_credit: false
abstract_license: "CC BY 4.0"
abstract_license_url: "https://creativecommons.org/licenses/by/4.0/"
abstract_attribution: "KSKB, the KERISuite Knowledge Base (https://kskb.dev/)"
last_checked: "2026-10-15"
kskb_url: "https://kskb.dev/cards/papers-internet-safety-with-keri-percolation-oobi/"
kskb_app_url: "https://kskb.dev/#item/papers-internet-safety-with-keri-percolation-oobi"
kskb_record_url: "https://kskb.dev/data/kskb/resources/papers-internet-safety-with-keri-percolation-oobi"
kskb_markdown_url: "https://kskb.dev/export/cards/papers-internet-safety-with-keri-percolation-oobi.md"
---

# Internet Safety with KERI: Invasion Percolation Discovery, OOBIs (Out-Of-Band-Introductions), Spanning Trust Layer

A 28-slide deck by Samuel M. Smith, marked for an IIW (Internet Identity Workshop) session in 2021, on how KERI (Key Event Receipt Infrastructure) components discover each other. It covers user-permissioned percolated discovery, the OOBI URL forms, the BADA data acceptance policy, and the spanning-layer argument for KERI. For practitioners and implementers.

Labels: reading level Implementer; evidence informative (an author's paper, deck, tutorial or post explaining the suite).
Source: https://github.com/SmithSamuelM/Papers/blob/master/presentations/KERI_Percolation_OOBI.web.pdf (license not recorded).
The abstract is KSKB's own text under Creative Commons Attribution 4.0 (CC BY 4.0), https://creativecommons.org/licenses/by/4.0/; credit KSKB, the KERISuite Knowledge Base (https://kskb.dev/).