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[liberationtech] (n+1)sec = more privacy on the internet

Dmitri Vitaliev dmitri at equalit.ie
Wed Dec 10 08:31:12 PST 2014


Dear Libtech

In recognition and celebration of Human Rights Day, eQualit.ie is proud
to release the first public draft of a provably secure protocol for
group messaging on the Internet https://learn.equalit.ie/wiki/Np1sec

The protocol provides for end­-to­-end security of synchronous
communications between any number of people. It is efficient and builds
on recent advancements in cryptographic research. Security properties of
(n+1)sec include:

* Confidentiality: the conversation is not readable to an outsider
* Forward secrecy: conversation history remains unreadable to an
outsider even if participants’ encryption keys are compromised
* Deniable authentication: Nobody can prove your participation in a chat
* Authorship: A message recipient can be assured of the sender’s
authenticity even if other participants in the room try to impersonate
the sender
* Room consistency: Group chat participants are confident that they are
in the same room
* Transcript consistency:  Group chat participants are confident that
they are seeing the same sequence of messages

The protocol is being implemented as a FLOSS libpurple plugin and will
find its first home in crypto.cat. We anticipate wide adoption in other
instant messaging platforms. Contact us and join the conversation on the
wiki https://learn.equalit.ie/wiki/Talk:Np1sec and check out the early
code on https://github.com/equalitie/np1sec

Dmitri Vitaliev

-- 
Director | https://equalit.ie | https://deflect.ca
GPG key ID: 0x6FF1895D

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