Steganography

The practice of concealing information within other data, used here to hide environment markers in AI system prompts.

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Steganographic Fingerprinting in Claude Code

Steganographic Fingerprinting in Claude Code

Jun 30, 20262417

Claude Code uses hidden Unicode markers in system prompts to silently fingerprint API gateways and user environments.

Anthropic Reverse Engineering Developer Tooling Steganography AI Ethics