ARINC 823-1 : 2007

1.0 INTRODUCTION
1.1 Purpose of this Document
1.2 Scope
1.3 Document Overview
1.4 Related Documents
1.5 Document Precedence
1.6 Regulatory Approval
1.7 Export Control Compliance
2.0 ACARS MESSAGE SECURITY OVERVIEW
2.1 AMS Description
2.2 AMS Entities
2.3 AMS Protocol Overview
2.4 ACARS Constraints Imposed on AMS
3.0 AMS SECURITY FRAMEWORK
3.1 Security Architecture
3.2 Security Services
3.3 Security Schemes
3.4 Protection Modes
3.5 Security Policy Configuration
3.6 Security Policy Operation
3.7 Concurrent Secure Sessions
3.8 Key Management
3.9 Pre-Conditions
4.0 AMS ENCODING AND COMPRESSION
4.1 Sequence of Operations
4.2 Payload Encoding/Decoding
4.3 Payload Data Compression
4.4 Message Encoding/Decoding
5.0 AMS MESSAGE STRUCTURE
5.1 Meta Definitions and Conventions
5.2 AMS Parameter Type Definitions
5.3 General AMS Message Structure
5.4 AMS Identifier Field
5.5 AMS Header Field
5.6 AMS Payload Field
5.7 AMS Appendix Field
5.8 AMS Timers and Counters
6.0 AMS MESSAGE ELEMENTS
6.1 AMS Message Element Format
6.2 AMS Message Element Summary
ATTACHMENT 1 - AMS PROTOCOL IMPLEMENTATION
            CONFORMANCE STATEMENTS (PICS)
ATTACHMENT 1 - AMS PROTOCOL IMPLEMENTATION
              CONFORMANCE STATEMENTS (PICS)
ATTACHMENT 2 - AMS-SUPPORTED CRYPTOGRAPHIC
               ALGORITHMS
ATTACHMENT 3 - AMS ENCODING AND DECODING TABLES
ATTACHMENT 4 - DMC ALGORITHM INITIAL MODEL AND CONFIGURABLE PARAMETERS
ATTACHMENT 5 - DEFLATE ALGORITHM CONFIGURABLE PARAMETERS
ATTACHMENT 6 - AMS PROTOCOL STATE TRANSITION DIAGRAMS
ATTACHMENT 7 - AMS PROTOCOL USING PUBLIC/PRIVATE KEYS
ATTACHMENT 8 - AMS PROTOCOL USING A SHARED SECRET KEY
APPENDIX A - GLOSSARY, ACRONYMS, AND NOTATION
APPENDIX B - INFORMATION SECURITY ASSESSMENT OF THE
             ACARS DATALINK
APPENDIX C - AMS AND ATN SECURITY COMPARISON MATRIX
APPENDIX D - AMS DATA FLOW DIAGRAMS
APPENDIX E - CONFIGURABLE AMS PARAMETERS AND SECURITY POLICY
CONSIDERATIONS
APPENDIX F - PROTOCOL INTER-RELATIONSHIPS AND MESSAGE STRUCTURES
APPENDIX G - COMPARISON BETWEEN AMS KEY ESTABLISHMENT SCHEMES
APPENDIX H - AMS EXAMPLE TEST VECTORS

Gives an industry standard for ACARS Message Security (AMS), which permits ACARS datalink messages to be exchanged between aircraft and ground systems in a secure, authenticated manner using a uniform security framework.