You can use a signature to verify that a video hasn’t been modified, but that doesn’t really help in itself with fakes since fakes can be signed too. And if the

You can use a signature to verify that a video hasn’t been modified, but that doesn’t really help in itself with fakes since fakes can be signed too. And if the cameras are doing the signing, you’d just need to extract the private key from the camera and use it to sign fakes. It would require something like the secure enclave to protect the private key and, of course, we’d then be trusting the camera manufacturers.