Cisco Enables Blockchain for Group Chat Data Encryption

April 3, 2018

One of the world’s largest IT companies Cisco plans adopting blockchain technology in establishing secure group chats. Related patent was published at the U.S. Patent and Trademark Office (USPTO) website last Thursday on March 29.

According to the document, group chat participants will have to deal with general problems like group membership, data transfer, update and anti-intrusion protection.

With this document Cisco representatives enable using cryptographic keys together with other group members to set a decentralized P2P group chat with access by invitation.

The system is supposed to function as follows:

The main block of the chain is created at the device of the first chat member. Then he or she invites other users while the block defines group members. When joining the chat each of the consequently invited ones creates their own block that link to the initial one. All actions taken by the participants like adding or deleting users, shared documents and thread-specific data are registered in the created blocks.

“In summary, presented herein is a method for achieving authorization in confidential group communications in terms of an ordered list of data blocks representing a tamper-resistant chronological account of group membership updates ... There are many applications of these techniques. One such application is enabling end-to-end encryption of instant messaging, content sharing, and streamed media”, the document says.

It is to be added that the previous Cisco’s patent considered feasibility of using blockchain for Internet-of-Things (IoT).


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