What is content obfuscation in spam?
Content obfuscation disguises spam to evade text-based filters. Techniques include: character substitution ("pr0duct" for "product"), using images instead of text, homoglyph characters, and randomized filler content.
HTML tricks: invisible text affecting filters but not display, CSS tricks hiding content, and variable fonts or colors preventing pattern matching.
Modern filters counter with: image OCR (reading text in images), rendering analysis (seeing what users see), and machine learning detecting obfuscation patterns themselves. Obfuscation becomes a spam signal rather than effective evasion.
Was this answer helpful?
Thanks for your feedback!