1. -By Shrutirupa Banerjiee(@freak_crypt)
Let Us Gossip About It!!
-By
Shrutirupa

2. Who am I? Blockchain and Security Enthusiast
Mathematics and Core Cryptography Researcher

3. What is Gossip??

4. Key Features Probabilistic Exchange of Information Fault Tolerance
Repetitive
Reliable
Scalable
Robust
Decentralised

5. How is the information disseminated???

6. 3 States
Susceptible
Infected
Removed

7. Susceptible
The node does not know about the update

8. Infected
The node knows the update and is actively spreading it

9. Removed
The node knows the update, but it does not participate in the spreading any more

10. Models
SI (Susceptible-Infected)
SIR(Susceptible-Infected-Removed)

11. SI Model
push-pull style
pull style
push style

13. SIR Model Based on the Push style(Pull could be used as well)
Susceptible nodes receiving the update become infected
These infected nodes push the update to other nodes
The protocol terminates, when all susceptible and infected nodes are switched to removed state.

14. The decision to transition to the removed state is influenced by the following factors:
Blind(evaluation to transit to removed state done at each round)
Feedback(evaluation to transit after receiving a message when node is aware of the update)
Counter(transition is performed after a fixed number of rounds)
Coin(transition is performed with a given probability at each round)

16. CASSANDRA

17. Nodes exchange information using a Gossip protocol about themselves and about the other nodes that they have gossiped about, so all nodes quickly learn about all other nodes in the cluster

18. Code Snippet
Demo

20. Reference