24
Revery: v0 of a secure messaging protocol (github.com)
submitted 1 year ago by to c/privacy@lemmy.ml
7 comments fedilink hide all child comments
 

i started a (very niche) private messaging protocol & little CLI app demo. i’m no security expert, so any feedback or questions would be appreciated.

the gist is an ephemeral message exchange without identities. the goal is ultimate deniability.

the interesting (and weird) part is that messages are encrypted but not authenticated. this means an imposter could show up if they know the shared secret. otoh this means you can deny anything you say.

you are viewing a single comment's thread
view the rest of the comments
[–] 6 points 1 year ago (1 child)

Couldn't you use HMAC with shared secret key to authenticate messages while keeping plausible deniability? Since the key is only supposed to be known to the 2 parties, the recipient can deduce that a message was actually sent by the sender if he did not create it himself. I think that's what OTR was using.

  • permalink
  • fedilink
  • source
  • hideshow 1 child comment
    •