[drenvuk]

So you want to slice and concatenate strings without you yourself and any other collaborators knowing what the string is? what about hashing each word? you could slice and concat on whitespace boundaries if that's the case.

i'm not sure how this helps e2e encrypted collaborative editing though. why not just use asymmetric encryption? what am i missing?

[bikeshaving]

Asymmetric encryption is great, but it means that all rebasing/transforming of edits has to be done client side. Having a homomorphic system would allow us to do some of this work server-side without revealing the documents themselves.

[drenvuk]

eh, I'm still not getting it. why not have a single or maybe multiple admins that all need to coordinate and decrypt before values can be decrypted for anyone else? upload their subkeys to the server for hashing the words, create shortened aliases for the hashes and then allow you to see them all. then you can do whatever you want with individual words that you want.

did you want to transform within words or something?