Cross chain security — Safety, Liveness and Economic Security


Safety means nothing bad happens.

Ronin’s bridge validator set


Liveness asserts that something good will eventually happen.

Nothing bad will happen, but nothing good will either

Economic Security

Game theory, basically. A system is secure if the value to be lost is higher than the value that can be gained by attacking.


Structural Security

“Define each process and its interactions.”

Suzanne Ciani testing in prod

There is no easy way of measuring structural security, but try to understand all the elements of a system and how they interact.

Gravity bridge involves interactions between: Tendermint client, Cosmos SDK modules, Ethereum’s PoW, the EVM, relayers.



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Cross chain desperado loose in the wireld