If you had asked me if single-server private information retrieval was possible, I'd have said no until I read papers on single-server PIR. If you had asked me

If you had asked me if single-server private information retrieval was possible, I'd have said no until I read papers on single-server PIR. If you had asked me if oblivious RAM were possible, I'd have said no until I read papers on ORAM. I think we could do a lot more than we are now.