Cats, Dogs and Bitcoin

Pieter Wuille and Gregory Maxwell each answer a question about using Bitcoin private and public keys for encryption rather than their typical use for signing and verification. Previously, using the -rpcallowip configuration option would cause Bitcoin Core to listen on all interfaces (although still only accepting connections from the allowed IP addresses); now, the -rpcbind configuration option also needs to be passed to specify the listening addresses. Users in the United States still can’t use the international Binance platform. International payments are extremely easy and very cheap. 2033: provides a new listforwards RPC that lists forwarded payments (payments made in payment channels passing through your node), including providing information about the amount of fees you earned from being part of the forwarding path. Although this provides trustless security, it has an unwanted side-effect related to transaction fees-the parties may be signing channel states weeks or months before the channel is actually closed, which means they have to guess what the transaction fees will be far in advance. This week’s newsletter contains a warning about communicating with Bitcoin nodes using RPC over unencrypted connections, links to two new papers about creating fast multiparty ECDSA keys and signatures that could reduce transaction fees for multisig users, and lists some notable merges from popular Bitcoin infrastructure projects.

All you need are two or more wallets that implement multiparty ECDSA key generation and signing. This text is sometimes added so that LN wallets can register for it as URI handlers. Maxwell explains that it’s easy-if you can trick people into skipping part of the verification procedure. RPC communication is not encrypted, so any eavesdropper observing even a single request to your server can steal your authentication credentials and use them to run commands that empty your wallet (if you have one), trick your node into using a fork of the block chain with almost no proof-of-work security, overwrite arbitrary files on your filesystem, or do other damage. Fraudsters are using dating apps, social media, and messaging app “wrong numbers” to lure victims into trading scams. Best of all, these advantages are available immediately to anyone who implements them because the Bitcoin protocol’s current support for ECDSA means it also supports pure ECDSA multiparty schemes as well. Even if they don’t see general adoption, their privacy advantage means they could end up well deployed among niche users. Even if you never connect to your node over the Internet, having an open RPC port carries a risk that an attacker will guess your login credentials.

If the result is either “closed” or “filtered”, your node is safe unless you’ve set a custom RPC port or otherwise have enabled a customized configuration. Anybody who might have told you that .Com domains would go away, lose value, be replaced by other domain extensions or technologies was totally wrong, or worse. By default, nodes do not accept connections to RPC from any other computer-you have to enable a configuration option to allow RPC connections. If this option is present, you should remove it and restart your node unless you have a good reason to believe all RPC connections to your node are encrypted or are exclusive to a trusted private network. It does have the batch validation property. ● What makes batch verification of Schnorr signatures effective? Pieter Wuille provides a simple explanation for how it’s possible to do several multiplication operations simultaneously on an elliptic curve. ● Simplified fee bumping for LN: funds in a payment channel are protected in part by a multisig contract that requires both parties sign any state in which the channel can close. If the parties agree before creating the pubkey, they may also make it possible for fewer than all of them to sign, e.g. 2-of-3 of them must cooperate to sign.

Binance is secure for the user since it only requires your email address to sign up. 2063: new functions for creating sweep transactions have been added, replacing functions from the UTXO Nursery that is “dedicated to incubating time-locked outputs.” These new functions accept a list of outputs, generate a transaction for them with an appropriate fee that pays back into the same wallet (not a reused address), and signs the transaction. 1. You will have seen a Buy button in the middle of the screen; click on it. A future change will likely support an optional wumbo bit (jumbo bit) that allows the node to negotiate extra-large channels and payment amounts. This decentralization allows for greater transparency, as transactions on the blockchain are publicly visible, providing accountability. That’s why security services and spies are using bitcoin to launder cash. It has the potential to become an industry standard that will be implemented by nearly all wallets and may be used by many services (such as peer-to-peer marketplaces) as well as for customer support, 바이낸스 KYC 인증 so Optech encourages allocating some engineering time to ensure the proposal is compatible with your organization’s needs. The sweep transactions set nLockTime to the current block chain height, implementing the same anti-fee sniping technique adopted by other wallets such as Bitcoin Core and GreenAddress, helping to discourage chain reorgs and allowing LND’s sweep transactions to blend in with those other wallets’ transactions.

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