Lightning network exploit through making the other party to make a false claim, ie a joe job, what protects against this_ _ Bitcoin bitcoin official currency

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Node security will need to be a high priority for lightning network. Unlike a bitcoin full node, LN nodes must autonomously sign transactions, which in turn requires access to the unencrypted key material. There has been very little public discourse on what will be required to secure LN nodes.Bitcoin official currency for users seeking the simplest use case (pre-paid credit/checking account), there is no need for autonomous signing, so their keys can be kept encrypted and offline. That use case is fraught with its own issues, but that’s a separate topic. Merchants and users wanting to service third-party transactions will need their nodes to perform autonomous signing, and will need to take appropriate measures to secure their systems. This will come at a cost that will need to be recouped via fees.

Some proposed solutions offload signing to dedicated hardware, similar to trezor or ledger, although they would need to be always-on/always-unlocked to facilitate autonomous operation. While these solutions protect the raw key material, it doesn’t solve the problems of a compromised node. An additional layer of logic is required to ensure the signing requests are within reasonable parameters, or else the hacked node could be made to request a malicious transaction be signed.Bitcoin official currency this logic must then be run within a secure environment separate from the node.

Robust information security practice, and perhaps a little bit of luck, is what will protect bob’s node from alice and all the other mallorys of the world. Risk mitigation can reduce bob’s dependence on luck by trading convenience (and operational cost) for damage limitations. Breach insurance is a mitigation growing in popularity for other fields of information security concern, though it will probably be quite a while before insurers would want to take on the risks for general users.

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Once she’s compromised bob’s node, alice could sign LN transactions spending bob’s balances to a node she controls. This saves the 2x on-chain fees for publishing a deprecated commit as bob and subsequent breach remedy as alice would entail.Bitcoin official currency

She could alternatively modify bob’s routing logic, passing all rebalancing transactions through a high-fee node she controls. This is a lot quieter than out-right stealing his funds, but if it goes undetected for a long time could result in a better take. This is an ideal attack for malicious insiders, say a disgruntled sysadmin.

The weak link is that lightning dismantles all the features that makes bitcoin easily secured. Bitcoin doesn’t require all users to run an interactive network client to transact, lightning does. Bitcoin allows you to passively receive payments, lightning requires the receiver to autonomously sign a transaction. Bitcoin has no third-parties involved in the path of transaction (or everyone is a third-party), that is the very basis of lightning. These changes make LN a totally different beast to secure, one that running bitcoin hasn’t prepared anyone for.Bitcoin official currency

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