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

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

Dear Libtech

In recognition and celebration of Human Rights Day, is proud
to release the first public draft of a provably secure protocol for
group messaging on the Internet

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 We anticipate wide adoption in other
instant messaging platforms. Contact us and join the conversation on the
wiki and check out the early
code on

Dmitri Vitaliev

Director | |
GPG key ID: 0x6FF1895D

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