PCM Level
Cybersecurity
Five stacked security layers — from hardware codec physics at CL-0 to AI-governed policy at CL-II — unified and audited by the Guardian Posse intelligence wrapper at CL-IV. Every layer is deterministic. Every claim is re-derivable.
The base layer. Raw sensor and signal data enters the Nucleus GCQ codec and is immediately mapped into a compressed codebook representation before it touches any software stack. The codebook is the sovereign primitive — data without the matching codebook is structurally meaningless. No payload transits this layer in plaintext form.
The memory physics layer. Phase-Change Memory operates with discrete, measurable cell states — each state is a hard physical boundary, not a software abstraction. The RTOS scheduler governs write and read timing to prevent cross-cell state bleed and enforces deterministic state transitions. Security is grounded in the physics of the storage medium, not in software permissions that can be bypassed.
Every data transaction passes through four AI-governed gates in sequence. No gate is advisory — a single failed gate halts the transaction. The gates operate on the encoded codec output from CL-0/CL-I, not on raw data, so the AI Governor never sees unquantized plaintext.
The encoder and decoder each hold asymmetric halves of the codebook pair. Neither side alone can reconstruct the full encoding — the codebook asymmetry is the cryptographic primitive, enforced at the codec boundary. A compromise of one side yields an incomplete, non-decodable fragment. This layer operates above CL-0's GCQ quantization, applying the sovereignty split to the already-compressed representation.
The CL-IV wrapper enforces policy compliance, audit trails, and regulatory assertions across all layers below. It does not replace the lower layers — it instruments them. Every CL-0 codec receipt, every CL-I cell-state transition log, every CL-II gate result, and every CL-III sovereignty event is captured, SHA-256 hashed, and mapped to NIST 800-53, CMMC, NRC 10 CFR 73.54, IAEA NSS 17, and IEC 62443 control families. The 12 defense agents run continuously against the layered telemetry stream.
PCM Level Cybersecurity makes no probabilistic claims. Each layer produces a verifiable output: GCQ codec receipts from CL-0, RTOS state logs from CL-I, four-gate pass/fail records from CL-II, and split-codebook attestations from CL-III — all anchored into the Sovereign 144 Master Equation corpus-parity hash visible at /proof. NRC, IAEA, and DoD auditors can re-derive the chain themselves.