Hackers are using the dreaded “zero font” tactic in phishing emails, instilling a false sense of legitimacy in otherwise malicious threats, researchers are saying. 

Just as the name suggests, zero font is a tactic in which hackers use the size 0 for a font, making certain text invisible to the human eye. At the same time software, and more importantly – antivirus and email protection software – can read it. Threat actors leverage this fact to confuse email security solutions and have otherwise malicious emails end up in the inbox, instead of the spam folder.

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