# Difinity Youtube Channel Research Note ## Inside the Internet Computer | Academy Talks ### Topics - Network Nervous System (NNS) - Chain Key Cryptography - Consensus Overview - Non-interactive Distributed Key Generation and Key Resharing - Identity and Authentication on the Internet Computer - Peer-to-Peer (P2P) - Upgrades - Resumption - Certified Variables - Message Routing - Canister Lifecycle - Bootstrapping - Certified Variables - State Synchronization - Ingress Message Lifecycle - Execution ### Network Nervous System (NNS) ### Chain Key Cryptography ### Consensus Overview Consensus Components - Block Making - Propose block to extend blockchain - Notarization - Ensure valid blocks are published - Random Beacon - Agree on randoness - Finalization - Know when a block is agree upon ### Non-interactive Distributed Key Generation and Key Resharing 每個 subnet 有一個公鑰 ### Identity and Authentication on the Internet Computer ### Peer-to-Peer (P2P) ### Upgrades ### Resumption ### Certified Variables ### Message Routing ### Canister Lifecycle ### Bootstrapping ### Certified Variables ### State Synchronization ### Ingress Message Lifecycle ### Execution