# Consensus Protocols within blockchain.
### Proof of Work (PoW)
When a transactions are initiated by a user, 'miners' or supercomputers try to solve a problem or puzzle to verify it. This transaction is then a part of the next block which will be added to the chain.
### Proof of Stake (PoS)
A user is encouraged to spend more until he/she becomes a validator to create a block.
### Delegated Proof of Stake (DPoS)
Same as PoS but users with more coins will get voting power and elect witnesses to view the block verification.
### Leased Proof of Stake (LPoS)
Users will be able to make customised tokens and use it on their accounts for better security.
### Proof of Elapsed Time(PoET)
Similar to PoW but the difference is that is focuses more on consumption.
### Practical Byzantine Fault Tolerance (PBFT)
Byzantine used a particular sequence to keep the rogue users at bay.
### Simplified Byzantine Fault Tolerance (SBFT)
A single validator can bundle proposed transactions and create a new block
### Delegated Byzantine Fault Tolerance (DBFT)
Focus on a gamified way of a block verification among the professional node controllers.
### Proof of Activity (PoA)
Uses both PoS and PoW to ensure the reward points are on time.
### Proof of Authority (PoAUTH)
Uses a consensus mechanism based on identity as a stake, delivers comparatively fast transactions.
### Proof of Burn (PoB)
Users burn some of their token to enter into the possibility of mining the next block.
### Proof of Capacity (PoC)
Using this protocol you can utilize the capacity or storage space of user's hard drive.
### Proof of Importance (PoI)
Users that frequently send and receive transactions will get paid for that.
### Proof of location (PoL)
A protocol that uses locations of the users as proof.
### Proof of Weight (PoWeight)
Similar to PoS but the difference is that it depends on various other factors that effect the outcome, these factors are 'weights'.
##Passing the blockchain?
### Directed Acylic Graphs (DAG)
Rather than a chain structure as seen in blockchain, A DAG has a more fluid and spread out structure, with blocks having multiple connections to others. This 'Tangle' is used in IOTA & others.