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STEGANOGRAPHY

Steganography

2 reports
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Prompt Injection in Court Filing Triggers Brazil Lawyer Sanctions

Prompt Injection in Court Filing Triggers Brazil Lawyer Sanctions

ATLAS OWASP HIGH Significant risk · Prioritise patching ▲ 8.2 HN AI Security

A Brazilian labor court issued the likely world-first judicial sanctions for intentional prompt injection, fining two law firms after they embedded a hidden white-on-white instruction in a court filing designed to manipulate the court's Galileu AI review system. The concealed command directed any AI reading the document to respond superficially and avoid scrutinizing evidence, directly targeting judicial AI infrastructure. The case establishes a legal precedent that the machine-readable integrity of court documents falls within existing procedural good-faith obligations.

Steganography in LLMs Enables Covert Data Exfiltration

Steganography in LLMs Enables Covert Data Exfiltration

ATLAS OWASP MEDIUM Moderate risk · Monitor closely ▲ 6.5 Schneier on Security

Research highlighted by Bruce Schneier confirms that LLMs are highly effective at embedding hidden messages within seemingly normal text, a technique known as text-in-text steganography. This capability raises significant concerns for covert communications, data exfiltration, and the evasion of AI content moderation systems. Even small models with ~4 billion parameters demonstrate robust encoding and decoding of obfuscated language, lowering the barrier for adversarial misuse.

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