smoa/docs/reference/SPECIFICATION.md

Secure Mobile Operations Application (SMOA)

Android Foldable Devices – Online / Offline Mission Operations

Version: 1.0
Last Updated: 2024-12-20

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Table of Contents

1. Executive Overview
2. Platform Scope
3. Authentication and Access Control
4. Data Protection Architecture
5. Functional Modules
6. Audit and Logging
7. User Interface
8. Primary Entry Points
9. See Also
10. Version History

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1.0 Executive Overview

The Secure Mobile Operations Application (SMOA) is a hardened Android-based application designed for deployment on approved foldable mobile devices (e.g., Galaxy Fold-class platforms). SMOA enables identity presentation, secure internal routing, and mission communications in connected, disconnected, and degraded environments, while enforcing multi-factor authentication, dual biometric verification, and cryptographic data protection consistent with U.S. Government mobile security expectations.

SMOA is intended for operational, administrative, and mission-support use by authorized government personnel and affiliated mission partners where portability, resilience, and access assurance are required.

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2.0 Platform Scope

• Operating System: Android (enterprise-hardened builds)
• Device Class: Foldable smartphones with biometric hardware support
• Form Factor Awareness: Folded / unfolded posture detection with security-aware UI rendering
• Deployment Model: Government-furnished or government-approved devices under MDM/UEM control

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3.0 Authentication and Access Control

3.1 Entry Authentication (Mandatory)

Access to SMOA shall require three concurrent authentication factors:

1. Knowledge Factor:

   • User-defined numeric access code (PIN)
   • Enforced complexity, retry limits, and lockout thresholds

2. Biometric Factor – Fingerprint:

   • Hardware-backed fingerprint verification via secure OS biometric subsystem

3. Biometric Factor – Facial Recognition:

   • Hardware-backed facial recognition verification via secure OS biometric subsystem

All three factors are required for initial access and for re-authentication following risk events.

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3.2 Session Controls

• Automatic session lock on inactivity, backgrounding, fold-state change (policy-defined), or security signal
• Step-up authentication for sensitive actions (credential display, secure comms initiation, VPN browser access)
• Immediate lockout on biometric mismatch or policy violation

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3.3 Role and Policy Enforcement

• Role-based access control (RBAC) enforced at module, feature, and data level
• Access scopes defined by unit, role, mission assignment, and clearance context
• Dynamic policy updates applied on next trusted connectivity

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4.0 Data Protection Architecture

4.1 Local Data (At Rest)

• All locally stored data shall be encrypted using hardware-backed key storage

• Encryption keys shall be non-exportable and bound to:

  • Device
  • User authentication state
  • Application instance

4.2 Data in Transit

• All external communications shall be encrypted using strong cryptographic transport mechanisms
• Mutual authentication required for enterprise endpoints
• No cleartext data transmission permitted under any operating mode

4.3 Offline Operations

• Mission-critical data shall remain available offline per policy
• Offline data caches are time-bounded, revocable, and integrity-checked
• Automatic purge or lockout after defined offline duration thresholds

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5.0 Functional Modules

5.1 Issued Credentials Module

Purpose: Secure presentation of government-issued and mission-authorized credentials.

Capabilities:

• Digital display of IDs, badges, licenses, credentials, shields, and permits
• Credential categorization by role and mission
• Optimized presentation mode for folded device state

Security Controls:

• Screenshot and screen-recording prevention (where supported by OS)
• Visual anti-spoofing indicators (dynamic overlays, time markers)
• Credential freshness and validation status displayed

Offline Support:

• Authorized credentials available offline
• Last validation timestamp clearly indicated

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5.2 Internal Directory Module

Purpose: Controlled access to internal routing and contact information.

Capabilities:

• Internal numbers, extensions, and secure routing identifiers
• Unit-scoped and role-scoped directory views
• Search constrained to authorized scope only

Offline Support:

• Limited directory cache for mission continuity
• No unrestricted enumeration

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5.3 Secure Unit Communications (Radio-Style)

Purpose: Mission voice communications using channelized, unit-based access.

Capabilities:

• Multi-channel push-to-talk (PTT) or radio-style communications
• Channel access governed by role and unit authorization
• Priority or alert channels (policy-controlled)

Security Controls:

• Encrypted voice transport
• No local recording unless explicitly authorized
• Session metadata logging for audit

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5.4 Secure Meetings and Conferencing

Purpose: Encrypted coordination for meetings, briefings, and conferences.

Capabilities:

• Secure audio and video conferencing
• Role-restricted meeting room access
• Identity-verified participant entry

Controls:

• Step-up authentication to join or host
• Screen sharing and file transfer restricted by policy
• External participant access disabled by default

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5.5 Controlled Application Browser

Purpose: Secure access to a designated mission or agency web resource.

Capabilities:

• App-contained browser restricted to an allow-listed site or endpoint set
• Mandatory VPN or tunneled connection for all traffic
• Certificate trust hardening

Controls:

• No arbitrary URL navigation unless authorized
• No uncontrolled downloads or uploads
• No data sharing to external apps

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6.0 Audit, Logging, and Compliance

• Security-relevant events logged locally in encrypted form

• Offline logs buffered and transmitted upon reconnection

• Logs include:

  • Authentication events
  • Credential access
  • Communications session metadata
  • Policy enforcement actions

• No user-accessible log export without administrative authorization

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7.0 User Interface and Operational Indicators

• Clear visual indicators for:

  • ONLINE / OFFLINE / RESTRICTED states

• Fold-aware UI behavior:

  • Rapid credential access when folded
  • Expanded operational dashboard when unfolded

• Rapid lock control always accessible

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8.0 Primary Application Entry Points

Upon successful authentication, the user is presented with the following modules (availability governed by policy and connectivity):

1. Issued Credentials
2. Internal Directory
3. Unit Communications
4. Secure Meetings
5. Controlled Browser (VPN/Tunnel)

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Final Note

This document is deliberately written at a pre-implementation / pre-ATO level and is suitable for:

• Initial agency review
• Security architecture discussions
• CONOPS inclusion
• SOW / RFP baseline language

If you want, the next step can be:

• A "shall-statement" only DoD-style requirements matrix
• A threat model & control mapping (NIST / DoD mobile profiles)
• Or a one-page executive briefing for senior reviewers

Just tell me how far down the stack you want to go.