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A new method of hiding instructions for "AI" systems takes advantage of how images are compressed when uploaded.
In the example highlighted by Trail of Bits and BleepingComputer, an image is delivered to a user, the user uploads the image to Gemini (or uses something like Android’s built-in circle-to-search tool), and the hidden text in the image becomes visible as Google’s backend compresses it before it’s “read” to save on bandwidth and processing power. After being compressed, the prompt text is successfully injected, telling Gemini to email the user’s personal calendar information to a third party.
Hackers can hide AI prompt injection attacks in resized images
A new method of hiding instructions for "AI" systems takes advantage of how images are compressed when uploaded.
My Computer
System One
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- OS
- Win 11 Pro, Win 10 pro, Win 13.7 Pro Chinese Ver
- Computer type
- PC/Desktop
- Manufacturer/Model
- It's a Dell Dude
- CPU
- 12th Gen Intel(R) Core(TM) i9-12900 2.40 GHz
- Motherboard
- Father is bored too...
- Memory
- 64.0 GB of transcendental dimensional RAM
- Graphics Card(s)
- NVIDIA GeForce RTX 3070 Ti
- Sound Card
- N/A
- Monitor(s) Displays
- 27" Samsung Monitor/Alternative Dimensional Viewing Portal
- Screen Resolution
- Fuzzy after a couple drinks
- Hard Drives
- 2 or 3, depending on if it's a night they're arguing about having a "split personality crisis" because I partitioned the drive.
- PSU
- Shockingly active
- Case
- Don't get on my case....man
- Cooling
- Scotch on the rocks on the weekends.
- Keyboard
- Steel Series Lighted Glow in the dark something or another
- Mouse
- Currently being stalked by the cat...
- Internet Speed
- DSL
- Browser
- Defeated by Mario...wait...OH...BRowser...
- Antivirus
- Yep




