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SSenStone

SSenStone Inc.

London, United Kingdom

Identity & AccessOT/ICS Security
Serves Critical Infrastructure, Enterprise
Profile last updated: August 19, 2026

About

SSenStone is a cybersecurity company based in London, United Kingdom working in identity & access, ot/ics security.

SSenStone is an OT security company that provides dynamic one-time authentication (OTAC) to protect operational technology such as PLCs, SCADA systems, HMIs and other critical infrastructure assets. Its authentication technology is designed for unidirectional, air-gapped and legacy OT environments and aims to replace static passwords and secure remote and third-party access. The company offers OTAC tokens, a trusted access gateway and an authentication SDK, serving sectors including energy, rail, utilities, manufacturing and finance. It has offices in London and Korea.

Location

London, United Kingdom

Legal name

SSenStone Inc.

Focus areas

OT securityOTACOT authenticationPLC securitySCADA securityIoT authenticationZero trustMulti-factor authentication

Languages

ENKO

Services & products

Security domains

Identity & AccessOT/ICS Security

How they deliver

Software

Products

OTAC Token v1.0

Authentication token

Authentication token based on unidirectional dynamic authentication (OTAC) that generates a new code with each use.

OTAC Trusted Access Gateway

Access gateway

Gateway providing dynamic authentication for access to OT and industrial systems.

swIDch Auth SDK

Authentication SDK

SDK for integrating OTAC-based authentication into applications and devices.

OTAC for Phygital

Authentication

OTAC authentication for physical and digital access control.

OTAC Holderless Card

Authentication token

Card-based OTAC dynamic authentication without a cardholder-specific credential.

Customers

Critical InfrastructureEnterprise

Industries served

EnergyRailUtilitiesManufacturingFood & BeverageFinance

Compliance & partners

Compliance frameworks

IEC 62443CRANIS2

Technology partners

Zwipe

Credentials & affiliations

Certifications

Common Criteria certification (OTACTokenV1.0)

NET Certification (New Excellent Technology)

Issued by: Ministry of Trade, Industry and Energy

ISO 9001

Awards

IR52 Jang Yeong-sil Award (OTAC for Phygital)

Ministry of Science and ICT2024

Top InfoSec Innovator Awards

2024

Global InfoSec Awards

2025

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