Gmail Users Face New AI Threats as Google Expands Encryption and Gemini Features

  

Gmail users have a fresh security challenge to watch out for — the mix of your Gmail inbox, Calendar, and AI assistant might pose unexpected risks. From malicious prompts hidden in emails or calendar invites to compromised assistants secretly extracting information, users need to stay cautious.

According to Google, “a new wave of threats is emerging across the industry with the aim of manipulating AI systems themselves.” These risks come from “emails, documents, or calendar invites that instruct AI to exfiltrate user data or execute other rogue actions.”

The integration of Gemini into Gmail was designed to simplify inbox management with smarter search, replies, writing assistance, and summaries. Alongside this, Google has rolled out another significant Gmail feature — expanded client-side encryption (CSE).

As announced on October 2, this feature is now “generally available.” Gmail users with CSE can send end-to-end encrypted (E2EE) messages to anyone, even non-Gmail users. Recipients simply receive a notification and can view the encrypted message through a guest account — offering secure communication without manual key exchanges.

However, these two major Gmail updates

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