How to encrypt largerfiles like image or pdf using openFHE?

I would like to use FHE on the Chat system, in which we might have a scenario to upload images and pdf, which should be encrypted, is OpenFHE supported for that? if so can u give some examples of how to achieve it?

Images are just arrays of integers HEIGHT x WIDTH x CHANNELS of values between 0-255, so that should be fine. Iā€™m not sure about PDFs

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