VOS3 User Guide

Overview of the VOS3 platform and links to detailed guide sections.

VOS3 User Guide

Use this guide to understand how VOS3 devices are built, secured, updated, and operated.

VOS3 is a Linux-based platform with a dual-processor architecture, authenticated software installation, and SDI-managed secure services.

Who this guide is for

This guide is most useful for:

• application developers
• solution architects
• service and support engineers

Platform at a glance

Key VOS3 concepts:

• the application processor handles runtime, UI, and communications
• the secure processor handles protected input, card interfaces, and key operations
• software installation uses signed bundles and an A/B update model

Core topics

Start with the topic that matches your task:

• System overview and architecture — platform model, supported devices, processors, services, and control panels
• Security and system protection — overview of the platform security model, cardholder data protection, and key management topics
• Lifecycle, modes, and startup — device lifecycle, APP-DEV mode, warrantied keys, and the startup flow
• Storage, users, and installation — overview of filesystem layout, package formats, signing, and installation topics
• Device connectivity and card interfaces — communications interfaces, card readers, and SDI card integration points
• User interface and application control — UI capabilities, media support, and Multi-Application Controller behavior

Related guides

Use these guides for development tasks and adjacent topics:

• Developing Applications on VOS3 — SDK setup, build flow, packaging, and debugging
• Migration Guide from Previous Platforms — key platform differences and migration notes
• VOS3 Password Management — MAC password policy, access groups, and deployment behavior
• VOS3 Foreign Object Detection (FOD) — FOD control panel, configuration, APIs, and troubleshooting
• UX302 / UX102 - User Guidance — UX302 unattended terminal and UX102/UX112 UEPP hardware, features, and programming