[tahoe-dev] "Elk Point" design for mutable, add-only, and immutable files

[Brian Warner]

David-Sarah Hopwood wrote:

> I'll explain it in more detail tomorrow. I dropped the ability to have
> write-only caps that do not allow reading, so only needed symmetric
> encryption.

Neat, I'll try to look it over soon. I think that write-only (well,
add-only) would actually be a nice feature to have, because it enables
"drop box" functionality that's hard to implement otherwise. But yeah,
there's no way to get that without asymmetric encryption.

cheers,
 -Brian