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ai security
Once popular for attacking AI, ASCII smuggling is embraced by spammers
ASCII smuggling, a technique that uses invisible Unicode characters to hide malicious instructions from human readers while remaining detectable by artificial intelligence (AI) systems, has expanded beyond its original use in prompt injection attacks on AI agents to become a tool for evading email spam filters. Spammers now employ this method to conceal unwanted messages in mass campaigns, exploiting the gap between what AI systems and humans can perceive in the same text.
Why it matters: Email administrators and security teams need to understand that traditional content-based spam filters may be bypassed by ASCII smuggling, requiring updated detection logic that examines character encoding rather than just readable text; AI practitioners also face continued refinement of evasion techniques targeting language models.
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- First seen by Cybersecurity Tracker