I guess they’re referring to AES-ECB, which is notoriously weak at encrypting images (it’s weak in general of course, just most obviously with respect to images

I guess they’re referring to AES-ECB, which is notoriously weak at encrypting images (it’s weak in general of course, just most obviously with respect to images): https://words.filippo.io/the-ecb-penguin/ https://words.filippo.io/the-ecb-penguin/. But I don’t think the same is true of the other AES cipher modes.