Invisible Unicode characters popularized for hiding instructions from AI models are now being used to obfuscate words before email filters parse them. The post ASCII smuggling crosses over from AI prompt injection to phishing evasion appeared first on Microsoft Security Blog .
ASCII smuggling crosses over from AI prompt injection to phishing evasion
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September 3, 2026
person
Microsoft Security Research, Noam Kochavi and Sarah Wolstencroft
domain
microsoft-defender