Protect Software and Firmware Distribution Architecture

Overview

This guide shows how to securely distribute software, firmware, and AI model updates using encrypted containers with cryptographically enforced access control.

Traditional software and firmware distribution methods rely on download links, storage permissions, or transport-layer security. These approaches cannot reliably prevent unauthorized access, copying, or deployment if distribution infrastructure, storage systems, or update channels are compromised.

Locktera secures software and firmware distribution by encrypting update packages into immutable containers and enforcing access policies cryptographically at the time of decryption. Only authorized devices, systems, or deployment environments can decrypt and install protected updates.

This ensures that software, firmware, and model updates remain protected throughout distribution and deployment, regardless of storage location, transfer method, or infrastructure security.

This is critical for protecting edge devices, IoT systems, embedded platforms, AI deployments, and enterprise software distribution.

Key Concepts

Cryptographically Protected Software and Firmware

Software and firmware packages are encrypted into Locktera containers before distribution.

This ensures:

Software and firmware cannot be accessed without authorization
Unauthorized systems cannot install protected updates
Update packages remain protected during storage and transfer
Protection persists regardless of storage or distribution method

Container contents remain immutable.

Secure Distribution to Authorized Devices and Systems

Encrypted containers may be distributed using any delivery method, including:

Update servers
Cloud storage
Device management platforms
OTA (Over-the-Air) update systems
Physical distribution

Only authorized devices and systems may decrypt and install the update.

Cryptographic Access Enforcement

Access to software and firmware is enforced cryptographically at the time of container decryption.

This ensures:

Only authorized deployment environments can install updates
Unauthorized copies of update packages cannot be decrypted
Compromised update infrastructure cannot expose protected updates
Access policies remain enforceable regardless of storage or transfer

Access enforcement does not rely on storage or network security.

Audit Logging of Update Access

Every container decryption request generates an audit record.

Audit logs provide visibility into:

Which device or system accessed the update
When update access occurred
Which identity initiated access
Whether access was authorized or denied

This enables secure update management and forensic analysis.

Common Use Cases

This workflow is commonly used for:

Secure firmware updates for IoT devices
Secure software update distribution
Secure AI model deployment and updates
Secure embedded system firmware distribution
Secure edge device software updates
Secure industrial system updates
Secure software distribution to customers

Architecture Flow

Software Publisher
     │
     │ Encrypt software or firmware into container
     ▼
Encrypted Container (.tera)
     │
     │ Distributed via update infrastructure
     ▼
Device / System
     │
     │ Decrypt container (if authorized)
     ▼
Secure Software Installation

Unauthorized systems cannot decrypt or install protected updates.

Prerequisites

Locktera API key
Software, firmware, or model file
Authorized device or deployment system identity

Base URL:

https://share.locktera.com/v1

Authentication header:

Authorization: Bearer YOUR_API_KEY

Step 1 — Encrypt Software or Firmware Update

Encrypt the update package into a container.

Request:

manifest.json

{
  "container": {
    "drm": {
      "dynamic": true
    }
  }
}

curl -X POST $BASE_URL/users/USER_ID/containers/encode \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "manifest.json=@manifest.json;type=application/json" \
  -F "name=Firmware Update v1.2.0" \
  -F "file=@firmware_update.bin"

Response:

{
  "org_id": "YOUR_USER_ID",
  "container": {
    "uuid": "123e4567-e89b-12d3-a456-426614174000",
    "name": "Firmware Update v1.2.0",
    "created_at": "2026-02-21T18:35:17Z"
  }
}

The update package is now encrypted and protected.

Step 2 — Distribute Encrypted Container

The encrypted container may be distributed using any delivery mechanism, including:

Update servers
Object storage
Device management systems
OTA update infrastructure
Secure file transfer

The container remains encrypted during distribution.

Unauthorized systems cannot decrypt the update.

Step 3 — Grant Access to Authorized Devices or Systems

Grant update access to authorized devices or deployment environments.

Request:

curl -X PATCH $BASE_URL/users/USER_ID/containers/CONTAINER_ID/drm \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
        "recipients": [
          "device-identity@company.com"
        ]
      }'

Response:

{
  "org_id": "YOUR_USER_ID",
  "container": {
    "uuid": "123e4567-e89b-12d3-a456-426614174000",
    "recipients": [
      "device-identity@company.com"
    ]
  }
}

Only authorized systems may decrypt and install the update.

Step 4 — Authorized Device Retrieves and Installs Update

Authorized device retrieves and decrypts the update.

Request:

curl -X GET $BASE_URL/users/USER_ID/containers/CONTAINER_ID/decode \
  -H "Authorization: Bearer DEVICE_API_KEY"

Response:

{
  "org_id": "YOUR_USER_ID",
  "container": {
    "uuid": "123e4567-e89b-12d3-a456-426614174000"
    "files": [
      {
        "name": "firmware_update.bin"
      }
    ]
  }
}

The device may now securely install the update.

Step 5 — Unauthorized Access is Blocked

Unauthorized devices cannot decrypt the update.

Response:

{
  "error": "access_denied",
  "message": "Decryption is not permitted for this container."
}

Unauthorized systems cannot install protected software or firmware.

Step 6 — Audit Update Access

Retrieve audit records.

Request:

curl -X GET $BASE_URL/users/USER_ID/containers/CONTAINER_ID/events \
  -H "Authorization: Bearer YOUR_API_KEY"

Audit logs provide visibility into:

Which devices accessed updates
When updates were accessed
Authorized and denied access attempts
Deployment activity

Step 7 — Emergency Revocation

curl -X PUT $BASE_URL/users/{user_id}/containers/{container_id}/block \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json"
  -d '{"reason": "Revoked"}'

201 Created

Architectural Components

Device Identity

Each deployment device or system must authenticate using a Locktera identity.

Examples:
• Device API key
• Embedded device identity
• Deployment system service account
• Hardware-bound identity

Security Properties

This workflow ensures:

Software and firmware are encrypted before distribution
Unauthorized devices cannot decrypt update packages
Access enforcement is cryptographic and cannot be bypassed
Update packages remain immutable
Access may be revoked at any time
Distribution infrastructure cannot access plaintext updates
Unauthorized copies cannot be used
All access attempts are audit logged

Comparison to Traditional Software Distribution

Traditional update distribution relies on:

Download links
Storage permissions
Network security

These methods cannot prevent unauthorized use if update packages are copied.

Locktera enforces access cryptographically.

Only authorized devices and systems can decrypt and install updates.

Summary

Locktera enables secure software and firmware distribution by encrypting update packages into immutable containers with persistent cryptographic access control. Only authorized devices and systems can decrypt and install protected updates. This ensures software, firmware, and model updates remain secure throughout distribution and deployment, protecting edge devices, embedded systems, and enterprise infrastructure.

Multi-Tenant Isolation Architecture

Identity and Key Management