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A PR has been opened to Bitcoin Core to make it harder for users to configure their node this way and to print additional warnings about enabling such behavior. At TravelbyBit, we want to make crypto useable, provide incentives for early adopters, and see crypto adoption grow. This can make the scheme appealing to existing services that gain from the additional security of Bitcoin multisig but lose from having to pay additional transaction fees for the extra pubkeys and signatures. 1. Monero has low transaction fees. 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. ● C-Lightning 0.6.1 released: this minor update brings several improvements, including "fewer stuck payments, better routing, fewer spurious closes, and several annoying bugs fixed." The release announcement contains details and links to downloads. If tumbler services want to remain around into the future, they may also need to provide access or details on transactions running through them. This week’s newsletter includes action items related to the security release of Bitcoin Core 0.16.3 and Bitcoin Core 0.17RC4, the newly-proposed BIP322, and Optech’s upcoming Paris workshop; a link to the C-Lightning 0.6.1 release, more information about BIP322, and some details about the Bustapay proposal; plus brief descriptions of notable merges in popular Bitcoin infrastructure projects.

● Optech Paris workshop November 12-13: member companies should send us an email to reserve spots for your engineers. ● Allocate time to test Bitcoin Core 0.17RC4: Bitcoin Core will soon be uploading binaries for 0.17 Release Candidate (RC) 4 containing the same patch for the DoS vulnerability described above. Again, those bitcoin ETFs will be betting on the price movement of bitcoin futures, not bitcoin itself. SHIB’s price rally can be attributed to the recent announcement by Shiba Inu’s developers and the bullish on-chain metrics of the meme coin. At first, there were bigger differences in their price moves. However, there’s no standardized way for users to do the same using a P2SH address or any of the different types of segwit addresses (although there are some implemented non-standard methods with limited functionality). Since there is no central figure like a bank to verify the transactions and maintain the ledger, a copy of the ledger is distributed across Bitcoin nodes.

The Bitcoin consensus protocol doesn’t use ECDH, but it is used elsewhere with the same curve parameters as Bitcoin in the know schemes described in BIPs 47, 75, and 151 (old draft); Lightning BOLTs 4 and 8; and variously elsewhere such as Bitmessage, ElementsProject side chains using confidential transactions and assets, and some Ethereum smart contracts. Gregory Maxwell has asked the Bitcoin protocol development mailing list for proposed soft fork solutions to the attack before he proposes his own solution. 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. Without limits imposed. Bitcoin allows its users to have full control over their money. Some of these schemes can’t use the default hash function libsecp256k1 uses, so this merged PR allows passing a pointer to a custom hash function that will be used instead of the default and which permits passing arbitrary data to that function. Patches for master and 0.16 branches were submitted for public review yesterday, the 0.16.3 release has been tagged containing the patch, and binaries will be available for download as soon as a sufficient number of well-known contributors have reproduced the deterministic build-probably later today (Tuesday).

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. 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. 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, so Optech encourages allocating some engineering time to ensure the proposal is compatible with your organization’s needs. 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. With this patch, your node will reject requests from an attacker to lock his funds and your funds for a period of more than 5,000 blocks (about 5 weeks). The announcement will include a copy of the release notes detailing major changes to the software since the 0.16.0 release. ● Upgrade to Bitcoin Core 0.16.3 to fix denial-of-service vulnerability: a bug introduced in Bitcoin Core 0.14.0 and affecting all subsequent versions through to 0.16.2 will cause Bitcoin Core to crash when attempting to validate a block containing a transaction that attempts to spend the same input twice.