Hidden Message Extraction Engine Architecture

This technical reference details the architecture of the zero-key multi-scheme steganography extraction engine located at js/features/scanner/engine/.

Engine Architecture

• carriers.js — Canonical frozen registry of invisible & evasive Unicode code points.
• profile.js — Code point iteration, statistical metrics, gap analysis, and StegnoLines Variation Selector candidate detection.
• decapsulate.js — Multi-layer decapsulated payload ladder (Base64/Hex -> gzip/deflate -> XOR -> entropy analysis).
• sanitize.js — Strips suspect carriers while preserving legitimate orthographic joiners.
• analyze.js — Main orchestrator scoring candidate hypotheses and performing prompt-injection & nested payload checks.
• analyze.worker.js — ES module Web Worker for async background execution.

Candidate Shape

{
  schemeId: string,
  label: string,
  bytes: Uint8Array,
  text: string,
  confidence: number, // 0 to 100
  notes: string,
  decapsulation: DecapsulationResult,
  isPromptInjection: boolean,
  hasNestedPayload: boolean
}