Encrypted Gossip Communication for Scalable Group Messaging
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Solution Overview
Problem
Existing communication protocols in large-scale networks face quadratic scaling issues in bandwidth and resource demands, leading to an unprecedented burden on existing systems, particularly in mesh networks.
Innovation Solution
A method for securely distributing encrypted messages using gossip-based communication protocols, involving agreeing a common group key among nodes, encrypting messages with this key, and distributing them through a network using a gossip-based protocol, ensuring only group members can decrypt the messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional communication protocols are used in large-scale networks, then message distribution can be achieved, but communication overhead and resource demands increase quadratically with network size
Solution Approach 1:
The network is segmented into groups of nodes, each with a designated group leader. Instead of every node communicating with every other node, messages are routed through group leaders who aggregate and forward communications. This segmentation reduces the communication complexity from quadratic O(n²) to linear O(n) scaling with network size.
Solution Approach 2:
Group leaders act as intermediaries between nodes within their group and the rest of the network. Each node communicates primarily with its group leader rather than all other nodes directly. The group leader aggregates messages and forwards them to other group leaders, reducing overall network traffic and communication overhead.
2Reliability
If group key agreement is implemented among all nodes, then secure communication is achieved, but computational burden and communication rounds increase
Solution Approach 1:
The group key agreement process is segmented by organizing nodes into groups with designated leaders. Instead of all N nodes participating in a single complex key agreement protocol requiring O(N) communication rounds, each group of size g performs key agreement independently. This reduces the computational burden and communication rounds from O(N) to O(N/g), where g is the group size.
Solution Approach 2:
Not all nodes need to directly participate in every key agreement computation. Group leaders perform the heavy computational lifting of key agreement on behalf of their groups, while other nodes in the group can derive the group key through lighter computations. This partial participation approach reduces overall computational burden while maintaining security.
Data Source
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AI summary
Methods of securely distributing a message to a group of nodes within a network, wherein the network comprises a plurality of nodes and the group of nodes comprises a subset of the plurality of nodes. The methods comprise: agreeing a common group key between all of the nodes in the group of nodes; encrypting, by a first node amongst the group of nodes, a message with the group key such that only nodes that are members of the group of nodes are able to decrypt and read the message; and distributing the encrypted message through the network using a gossip-based protocol.