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It's not a joke, it's the (informal) industry term. See this for example:

https://www.zdnet.com/article/protect-your-data-with-a-usb-c...

https://lifehacker.com/use-a-usb-condom-to-protect-your-devi...

Cool, didn't know they exist.

Also now USB-C condom is also available, It was an issue since USB-C used data lines to negotiate voltage and I was tracking its need on my problem validation for a while now[1].

[1] https://needgap.com/problems/73-usb-type-c-condom-usb-cybers...

> Also now USB-C condom is also available

Oh, I didn't know that! So what is the solution for USB-C? How do the new USB condoms work?

I'm not completely sure, I read on reddit that USB-C condom has some form of proxy circuit to negotiate voltage; I hope someone with better knowledge in this can explain it better.

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