---
title: "Tag: OT security"
description: "1 blog entry tagged OT security, newest first, each with published and updated dates."
url: https://policycortex.com/blog/tags/ot-security
sealed: 2026-11-06
amended: 2026-11-06
register: blog/tags/ot-security
records: 3
digest: sha3:8227a571056447e2741a2e98d93201179894b456efcb8ef13c9bb7b8b5fb64c6
---

# Blog entries tagged OT security

Resources / Blog / Tag: OT security

Every blog entry tagged OT security, newest first. Tags group the blog by subject so a reader working one requirement can follow it across entries as the rules change. Each entry shows when it was published and last updated; every entry is listed on the blog index.

1 entry · Last published 2026-11-06

## Entries, newest first

| Published | Entry | Reading |
|---|---|---|
| 2026-11-06 | [FBI and CISA Warn That Attackers Are Targeting Refrigeration Controllers](https://policycortex.com/blog/cold-chain-refrigeration-advisory): A joint advisory dated November 5, 2026 warns that attackers target refrigeration controllers in grocery and cold storage sites. | 5 min |

## Related records

Guides and articles describe the work. The evidence that work produces is described in three proof pages and one architecture page.

- **proof.state**: [Proof of State](https://policycortex.com/proof/state). What the environment was, as of a date someone else picks: point-in-time records, content hashed and chained.
- **proof.change**: [Proof of Change](https://policycortex.com/proof/change). Who or what altered the environment, under what authority, with before and after state hashes.
- **proof.agency**: [Proof of Agency](https://policycortex.com/proof/agency). What a machine was permitted to do before it acted, what it did, and what would have stopped it.
- **architecture**: [Architecture](https://policycortex.com/architecture). How the chain is built and where it lives: inside your tenant, with no egress of evidence.

Read the entries. Then verify the record they describe. [Request Access](https://app.policycortex.com/auth?mode=request-access) · [Book a call](https://policycortex.com/book)

## Register colophon

| Seq | Label | SHA3-256 | Prev |
|---|---|---|---|
| REC 0000 | HEAD | 2073a36d8434 | 9243f2301b1c |
| REC 0001 | ENTRIES | 45bd20e33316 | 2073a36d8434 |
| REC 0002 | RELATED RECORDS | 8227a5710564 | 45bd20e33316 |

Head sha3:8227a571056447e2741a2e98d93201179894b456efcb8ef13c9bb7b8b5fb64c6. Each digest is SHA3-256 over the previous digest, the register key, the record label, and the record copy; a second party can recompute it from this document.