AI Similarity Limitation Framework: Establishing Objective Standards for Generative AI and Deepfake Regulation

The AISL Framework is an open-source technical framework aimed at providing quantifiable, objective similarity thresholds for the regulation of generative AI and deepfake content, replacing traditional subjective judgment standards and promoting technical standardization in global AI governance. Its core idea is to address the subjective dilemma faced by the current legal system in handling deepfake cases through clear technical indicators.

With the development of generative AI technology, the quality of deepfake content has improved, leading to legal, ethical, and social issues. The current legal system faces a fundamental dilemma: judges rely on subjective perception to determine whether content is non-compliant, while modern generative technologies can produce fake content that is hard for the human eye to distinguish. The AISL Framework aims to replace vague subjective standards with quantifiable indicators.

The AISL Framework proposes three clear thresholds:

• 70% similarity: General reference, indicating source relevance, does not constitute a violation judgment;
• 85% similarity: Significant similarity warning, prompting potential infringement risks, requiring further review;
• 95% similarity: Red line for serious violations, regarded as a serious violation in harmful scenarios (unless explicitly authorized), providing technical basis for law enforcement.

The framework recommends using multiple scientific indicators to quantify similarity:

• Facial embedding similarity: Extract feature vectors using ArcFace/CosFace, calculate cosine similarity or Euclidean distance;
• Speech embedding similarity: Extract voiceprint features to detect voice cloning;
• Perceptual quality indicators: LPIPS (Perceptual Image Patch Similarity), SSIM (Structural Similarity Index);
• Generative quality assessment: FID (Fréchet Inception Distance, measuring distribution difference between generated and real images).

The AISL Framework is an open-source project that acknowledges its limitations (e.g., adversarial attacks) and welcomes contributors from diverse backgrounds (engineers, legal experts, policymakers, etc.). Development roadmap: Phase 1 (community discussion, version 0.1) to collect feedback; Phase 2 (version 1.0) to submit to international organizations such as ITU/ISO and OECD.AI. Documentation supports multiple languages including English, Brazilian Portuguese, and Simplified Chinese.

The application significance of the AISL Framework:

• Legal practice: Provide judges with objective technical basis, reducing subjective disputes;
• Platform governance: Help content platforms establish automated review mechanisms (e.g., 95% similarity triggers manual review);
• Technological development: Guide generative AI research and development, with built-in safety mechanisms to avoid crossing legal red lines.

The framework faces challenges in promotion:

1. Technical confrontation: The 'cat-and-mouse game' between forgery technology and detection technology;
2. Legal adoption: Large differences across jurisdictions, requiring time for unified standards;
3. Cultural differences: Different cultural perceptions of 'similarity';
4. Privacy trade-off: Balance between biometric data collection and privacy protection. Nevertheless, the framework is an important attempt in AI governance and has reference value.

The AISL Framework is not only a technical project but also a social experiment on 'how to govern AI'. It attempts to build a bridge between technological innovation and legal regulation, replacing subjective judgments with objective values and closed rules with open standards. For groups concerned about AI ethics, content security, and digital copyright, it is worth continuing to pay attention to, as its development will affect the compliance path and application boundaries of generative AI.