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# System prepended metadata

title: Difinity Youtube Channel Research Note

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# 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