Invisible AI Text Watermark & EU AI Act Compliance Inspector

⚡ Watermark Synthesizer & Pipeline

Synthetic AI Text to Analyze & Watermark 165 chars | 18 tokens

Watermark Scheme

Secret Key Seed (PRNG)

Gamma γ (0.50)

Bias Delta δ (2.0)

Token-Level Green-List Spectrum Inspector Click token to inspect PRNG hash & entropy

Selected Token: #1 "Artificial" GREEN LIST

PRNG Hash (Seed: 42 + Prefix): 0x7a3f89 • Greenlist Partition: Prob 0.50 • Watermark Bias Boost: +2.0 logit

⚔️ Adversarial Perturbation Attacks

Current attack state: Clean Baseline (No adversarial edits applied)

WATERMARK CONFIRMED

            Statistical Z-Score
            2.357
            Significance threshold > 1.645 (α=0.05)
          

Hypothesis P-Value 0.0092 Chance of false-positive baseline

Green Tokens 14 / 18 77.8% of evaluated tokens

Tamper Resistance High Survives mild paraphrase

Null Hypothesis (Random) Deterministic Watermark

z=1.65

z = 0.0 z = 2.0 z = 4.0+

EU AI Act Regulation (EU) 2024/1689 • Article 50 Audit

✓
Art. 50(2) Machine-Readable Marking:
Invisible cryptographic watermark is verifiable by automated parsers without human intervention.
✓
Art. 50(2) Tamper-Resistance:
Maintains statistical confidence interval under whitespace/homoglyph perturbations.
✓
Art. 50(4) Provenance Metadata Integrity:
Cryptographic hash anchors generation metadata to generator seed #42.

Decoded Provenance Metadata Payload

eu_provenance://ai_act_art50?gen=craftjs_v4&timestamp=1723685725&sha256=9b7c8e2a