Table of Contents
1. Introduction ........................................................................................................................................ 6
2. Message authentication ...................................................................................................................... 8
2.2.1. Single FV management master ................................................................................................. 9
2.2.2. Multi FV management master .................................................................................................. 9
2.2.3. Requirements for each entity .................................................................................................. 10
3. MAC Processing ................................................................................................................................ 12
3.3.1. Message authentication processing determination................................................................ 14
3.3.2. Getting message ID .................................................................................................................. 14
3.3.3. Getting MAC key ...................................................................................................................... 15
3.3.4. Getting FV ................................................................................................................................ 15
3.3.5. Construction of the authentication data ................................................................................. 15
3.3.6. MAC generation ....................................................................................................................... 15
3.3.7. Generation of the message with the authenticator ................................................................ 16
3.4.1. Message authentication processing determination................................................................ 17
3.4.2. Getting Message ID .................................................................................................................. 18
3.4.3. FV comparison .......................................................................................................................... 18
3.4.4. Getting MAC key ...................................................................................................................... 19
3.4.5. Getting freshness value for verification.................................................................................. 19
3.4.6. Construction of the authentication data ................................................................................. 19
3.4.7. Generation of the MAC for verification .................................................................................. 19
3.4.8. MAC verification ...................................................................................................................... 20
3.5.1. Re-verification .......................................................................................................................... 21
3.5.2. Notification of verification result ............................................................................................ 21
3.5.3. Message reception .................................................................................................................... 21
3.5.4. Accumulative verification fail counter .................................................................................... 22
4. Management of freshness value ........................................................................................................ 23
