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/* I. INTRODUCTION */ - updated github repo link
=I. INTRODUCTION=
<span style="font-size:200%">T</span>he ''(n+1)sec'' project was inspired by [https://otr.cypherpunks.ca/Protocol-v3-4.0.0.html Off-The-Record] messaging protocol and subsequent efforts to explore a multiparty use-case for OTR in [GUVGC09]. ''(n+1)sec'' is currently developed for [https://github.com/cryptocat/cryptocat/wiki/mpOTR-Project-Plan Cryptocat] - a browser based XMPP chat platform and assumes its use-cases. Most importantly, ''(n+1)sec'' allows for secure multi-party key exchange and end-to-end encrypted communications without extensive computational requirements from the client. You can follow and contribute to the implementation of [https://github.com/equalitie/libmpotr libmpotrnp1sec np1sec] on our Github pages. Future protocol iterations will consider a variety of other real-world use cases and be platform independent. Please use the [[Talk:Np1sec|Discussion]] page to ask questions and leave comments.
In the following section we summarise relevant publications and describe their influence on this protocol. In [[#III._Design_rationale|Section III]], we describe our approach and choice of security features. In [[#IV._Security_Properties|Section IV]], we review the security properties within this protocol. In [[#V._Chat_Session_Model|Section V]] we give basic mathematical definition needed to model the chat session and security proofs for various security aspects of the protocol. [[#IV._Adversarial_Models|Section VI]] provides formal definitions and references to the adversarial models for each property. In [[#VII._Protocol_High_Level_Design|Section VII]] we describe various parts of the protocol and present choices for each sub protocol. In [[#VIII._''(n+1)sec''_Protocol:_Step_by_Step|Section VIII]], we present each of the ''(n+1)sec'' protocol steps at various stages in schematic and algorithmic format. We present our choice of primitives in [[#iX._Cryptographic_Primitives|Section IX]]. Finally, we define the work that [[#Next_Steps|remains to be done]] on this protocol and [[#XI._Acknowledgements|acknowledge]] the good people who have helped us get here.
