The tactic involves embedding invisible text in resumes that AI processing tools can read, aiming to improve candidate ranking or advance them in the hiring process. A Duke University study of 200,000 resumes found at least 1% contained such injections. While a 2026 study by the Association for Computational Linguistics confirmed its effectiveness, especially when few applicants use it, major job platforms like Indeed are implementing safeguards to detect and defend against these manipulation attempts. Conversely, some recruiters view the ingenuity behind prompt injection as a positive trait for tech and innovation roles.