# Devcon Bo

# Rollups are the most secure bridge

https://app.devcon.org/schedule/m97jeg

He talked about the risk of bridge, and proposed the Bridge Risk Framework.

## History
two years ago, he started to work at the Multichain strategy for the make DAO
How do they move to the DAI, different chains?
To move DAI, they had to look at all the other chains and had to find out how secure they are.

They focused on other chains security.

They worked hard on this.

Then they figured that the information they searched should be more available to the broader audience.
They created a website called "L2 beat"
## First L2 beat
The Reasons is to make people aware that security of DAI on all other chains is very very different. For example DAI on Polygon and DAI on Fantom is very different and the security proparty of DAI is also very different.

Question:
1. Is DAI on Polygon or Fantom as secure as DAI on Ethereum
2. Can you make all these DAI fungible
3. What is needed to be able to mint DAI on all these chains

They looked at all the other chains and created L2 beat.
L2 beat was created as a website to disclose all the risks of other chains.
From this they found that people were looking at the risks and the valie locked and at all the information they uncovered

## The State of Bridging
### 2021,22 are bad years
They had a hack at the variety of Networks.
2021 is really very bad ,but that doesnt really compare to 2022, much much worse...

## L2 Beat for Bridges
https://l2beat.com/scaling/tvl/
### What is risk?
When funds are in transit and once they arrive to the destination, they should be safe? Not.

### Multichain
Multichain is one of the biggest Bridges with the biggest dvl
この構造にリスクが存在する。Validators can take funds from the escrow.

If you use the bridge that is externally validated, they can all take your funds.

### Plasma Bridge
well known?

## L2 Beat Bridge Risk Framework(main)
There are two types of Bridges and these Hybrid
- Token Bridge
- Liqidity Network
- Hybrid


There are four primary mechanisms(what of?)
- Third Party
you have to trust someone who can take your fands
- Optimistically
- By originating chain Validators
- Trustlessly by Ethereum

Focus on Validation
if you forget the external validators, everything can go wrong...
There four types of validation