https://aibriefcentral.com/tags/unicode-steganography/Recent content in Unicode Steganography on AIBriefCentralHugo -- gohugo.ioen-usThu, 26 Feb 2026 19:46:08 +0000https://aibriefcentral.com/2026/02/hidden-unicode-characters-can-trick-ai-into-following-secret-commands/Thu, 26 Feb 2026 19:46:08 +0000https://aibriefcentral.com/2026/02/hidden-unicode-characters-can-trick-ai-into-following-secret-commands/What Happened Researchers from Moltwire conducted extensive testing on how invisible Unicode characters can be weaponized against AI systems. They embedded hidden characters inside normal-looking trivia questions, encoding different answers than what appeared visible to human readers. The study tested five major AI models: GPT-5.2, GPT-4o-mini, Claude Opus 4, Sonnet 4, and Haiku 4.5 across 8,308 graded outputs. The researchers describe their method as a “reverse CAPTCHA” - while traditional CAPTCHAs test what humans can do but machines cannot, this exploit uses a channel machines can read but humans cannot see.