You can do some really cool cryptography if you assume your adversary has limited space. Examples include non-transferable signatures and streaming programs tha

You can do some really cool cryptography if you assume your adversary has limited space. Examples include non-transferable signatures and streaming programs that stop functioning when the stream stops (repugnant as a DRM but neat as a concept) https://eprint.iacr.org/2021/406 https://eprint.iacr.org/2021/406