How do attackers smuggle prompt injections past filters using encoding and obfuscation?
base64, leetspeak, invisible Unicode, and foreign scripts each let a payload look like gibberish to your filter yet read as a clear instruction to the model. The signal is knowing why the model decodes what the classifier cannot.
Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.
base64, leetspeak, invisible Unicode, and foreign scripts each let a payload look like gibberish to your filter yet read as a clear instruction to the model. The signal is knowing why the model decodes what the classifier cannot.
Lead with where the obvious approach breaks, because that is the judgment they are screening for — most candidates jump straight to the happy path and lose the room.
Then walk the failure back through the pipeline in order, naming the one metric the customer's exec sponsor actually cares about before you propose the fix.
