Once popular for attacking AI, ASCII smuggling is embraced by spammers
Spammers are increasingly using 'ASCII smuggling,' a technique involving invisible Unicode tags, to bypass email security filters. Originally used to hide prompts from AI agents, the method has now been adopted for mass spam campaigns.
Why it matters
This technique represents an evolving threat to email security and highlights the ongoing cat-and-mouse game between spammers and automated defense systems.
CAN YOU SEE THIS? Once popular for attacking AI, ASCII smuggling is embraced by spammers A once-overlooked block of unicode that’s invisible to humans is gaining ever wider use.
12 Eyeball with a digital line over it. Credit: Getty Images Eyeball with a digital line over it. Credit: Getty Images Text settings Story text Size Small Standard Large Width * Standard Wide Links Standard Orange * Subscribers only Learn more Minimize to nav A clever technique used to hide malicious prompts in attacks on AI agents has been adopted by spammers to evade filters on email platforms that are designed to flag unwanted messages used in mass campaigns.
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