depends what you mean by “solvable”. 0% attack success rate?

1. don’t use AI/ML.

    *f*(x) -> y

literally what’s happened here, they’ve turned it off short term. don’t use AI/ML and prompt injection can’t happen. use something else for f.

2. don’t allow untrusted/malicious input

    f(*x*) -> y

don’t allow bad x and you won’t get bad y. unfortunately models are designed to take an x, and figuring out every bad x is hard. the input space is massive and dynamic (variable length input sequences which are contextually variable too).

because figuring out the full space of bad xs is non-trivial, you’re left with doing stuff with known bad xs. which means cat and mouse game when new things pop up.

unless someone figures out how to map the full X space to the Y space, or we have infinite monkeys figure it out for us brute force — in which case we’re not doing machine learning any more.

3. don’t allow dangerous outputs

    f(x) -> *y*

if you don’t provide a mechanism for “do bad thing”, then the bad thing can’t happen. this doesn’t actually solve prompt injection, it just makes outcomes less impactful (see note). most enterprises have had to spend the last year or two figuring this out.

(old) Apple Siri solved for this by forcing users to remember specific “commands” it would run after doing TTS. can’t make Siri delete your phone contacts if you don’t create a Siri command to delete phone contacts.

—

it will be a cat and mouse game so long as people keep using AI/ML and keep passing untrusted input to the systems. best thing people can do is block dangerous things from happening. at least then it’s no going to wipe your prod DB.

unfortunately that doesn’t fit the “model goes brrrr” and “all devs will now be unemployed” narratives.

(note) denial of service attacks are still a thing here. make every output be “not the thing user wanted”.