Signing of files?

Hello, I’m new to crowdsec. I have been learning about scenarios and I notice that a lot of them have this data section that looks like this:

  - source_url:
    dest_file: backdoors.txt
    type: string

As I understand this will download that URL and use it to check whether an event should be flagged. My question is, are these files cryptographically signed at all? Is there any attempt to make sure the content is what is intended?

Thanks in advance for any cogent answers.