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System and method for secure end-to-end chat system

  • US 9,432,340 B1
  • Filed: 09/15/2015
  • Issued: 08/30/2016
  • Est. Priority Date: 05/07/2015
  • Status: Active Grant
First Claim
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1. A method of securely transferring data during a communications session, comprising:

  • connecting to a communications server by sending a request over a communications protocol by providing a client id and a server key;

    validating the connection by a challenge response sequence;

    initiating a communications session by either randomly generating a symmetric key or generating a key based on a user provided passphrase;

    broadcasting an encrypted message to a set of communications participants comprising of a randomly generated salt used for calculating the next key for the session;

    inviting a new user to the session providing the initial key and an IVec using ECIES and sending a resynchronization message with the new IVec to the group for the new client to participate.

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