F439_CPP_TX-RX_LoRa_Project

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RadioLink Security Model

## Security Goals

• Confidentiality • Integrity • Authenticity • Replay protection

## Threat Model

Attacker may: • inject arbitrary radio frames • replay captured traffic • attempt parser exploitation

Attacker does NOT possess the shared secret key.

## Cryptographic Design

Encryption: AES‑128 CTR

Authentication: AES‑CMAC‑128

MAC Coverage:

    CMAC(header || ciphertext)