All sorts - anything where you today give your data to some SaaS (and they encrypt it at rest, sure), and they then provide you some insight based on it or allo

All sorts - anything where you today give your data to some SaaS (and they encrypt it at rest, sure), and they then provide you some insight based on it or allow you to do something with it (by decrypting it, crunching numbers, spitting out the answer, and then encrypting the source data again) could potentially be done without the decryption (or the keys to make it possible). Concretely (and simplistically) - I give you two numbers, 2 & 2, but they're encrypted so you don't know what they are, and you add them together for me, but that's also encrypted so you don't even know that the sum of the inputs I gave was 4. It's 'computation on encrypted data', basically.