Avalanche - Scaling the blockchain with hybrid PoW & PoS consens

What is a double spent attack?

• Someone who sell a real product to 2 different buyers at the same time

• Someone who buy two different products from different buyers using the same coins

Why is double spent so common for a crypto currency?

• It is an open network, anyone can access

• No single authority in charge to verify transactions

What is the consensus to prevent double spent attack in Bitcoin?

• Proof of Work

• Proof of Stake

• Nakamoto

Is it possible to revert all transaction in the current Bitcoin network (from the genesis 2009) given the attackers have enormous hash power?

• Yes

• No

If a malicious actor takes control of more than 51% of a PoS network, is that possible to take the control back?

• Yes

• No - unless the majority given up control.

Can the history of network state be validated on a PoS chain?

• Yes

• No

Avalanche Post consensus will help to:

• Finalize a transaction instantly

• Finalize a block after one confirmation

• Prevent a chain split

Avalanche Pre consensus will help to:

• Finalize a transaction instantly

• Send a transaction faster

What primary property make Avalanche consensus to scale?

• Nodes to process transactions in different order

• Increase blocksize

• Reduce the lattency

What happen if a smaller group of nodes disagree with the majority?

• They have to follow the majority

• They may split into a smaller chain