Fine-tuning over prompting
Bake logic into model weights via fine-tuning. Weights harder to extract than prompt.
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Modular architecture
Different prompts per module. Compromise of one doesn't expose whole. Composable secrets.
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Obfuscation limits
Prompt obfuscation slows extraction but doesn't prevent. Motivated attacker will recover.
Legal
Trade secret law protection. NDA for developers. Contractual protection for user access.