Here's the killer feature of my approach: Each filter has its own HMAC/Argon2 key, so it becomes less useful for what I like to call crossword puzzle attacks. (

Here's the killer feature of my approach: Each filter has its own HMAC/Argon2 key, so it becomes less useful for what I like to call crossword puzzle attacks. (I hope that's easier to understand than a wordy explanation of how such an attack would work.)