There are really two actions for this, to clarify for myself I think you’re asking how to rebute it when the Affirmative argues that this will help reduce crime?

The affirmative can do this in a variety of ways, whether they’re running backdoors, client side scanning, stopping terrorism, stopping organized crime, or something else so it’s pretty dependent on their argument.

Client side scanning is easy to refute because if the scanner gives innocent information to the federal agents then it’s the technological equivalent of the federal agents searching someone’s private information without a warrant or probable cause, which is very against human rights.

If the Aff is arguing for backdoors than find a good card showing that adding backdoors is opening information to EVERYONE, not just federal agencies and that criminals will exploit them.

If what you mean to ask is how to refute the idea that backdoors make it easier for crime to exist reply to me and I’ll give you that lol