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4.5 Security Model

| Threat | Mitigation | |--------|------------| | Eavesdropping | Payload encrypted with AES‑GCM (256‑bit key) derived from a Diffie‑Hellman exchange performed during bootstrapping. | | Replay | Sequence numbers + per‑packet MAC; replayed packets will fail authentication. | | Man‑in‑the‑Middle (MitM) | Mutual attestation using device HID and server certificate; any mismatch aborts the session. | | Device Cloning | HID is fused into the SE; cloning attempts cannot reproduce the private key. | | **Denial‑ sax wap 2050com exclusive

3. System Architecture

Figure 1 (described textually) depicts the SW‑E stack across three logical layers: Based on your request, The New Digital Frontier:

| Era | Data Representation | Transport | Typical Latency (ms) | |-----|---------------------|-----------|----------------------| | 1G | ASCII/Plain Text | Circuit‑Switched | 100–500 | | 2G/3G | HTML/HTML5 | GPRS/UMTS | 30–150 | | 4G/5G | JSON/Protobuf | TCP/QUIC | 5–30 | DOM parsing requires O(N) memory

2. Background and Related Work

2.1 XML Streaming (SAX) vs. Tree‑Based Parsing

• DOM parsing requires O(N) memory, unsuitable for sub‑kilobyte edge devices.
• SAX provides push‑based event callbacks (startElement, characters, endElement) with O(1) memory, enabling pipeline processing of cXML streams.
• Recent work (e.g., Miller et al., 2022) shows SAX can achieve 2–3× lower CPU cycles than Protobuf on ARM Cortex‑M4 for telemetry payloads ≤ 1 KB.