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Bitcoin Core's 'v26.0' Upgrade Aims to Impede Eavesdropping, Tampering

The v26.0 upgrade contains experimental support for the v2 transport protocol as defined by Bitcoin Improvement Proposal 324 (BIP324).

By Jamie Crawley
Updated Mar 8, 2024, 6:20 p.m. Published Dec 6, 2023, 5:32 p.m.
Snippet of code pulled from Bitcoin Improvement Proposal 324, co-authored by Dhruv Mehta. (GitHub)
Snippet of code pulled from Bitcoin Improvement Proposal 324, co-authored by Dhruv Mehta. (GitHub)

The latest upgrade to Bitcoin Core, the primary open-source software for connecting the blockchain behind the world's largest cryptocurrency, is now live.

The v26.0 upgrade contains experimental support for the "v2" transport protocol as defined by Bitcoin Improvement Proposal 324 (BIP324), which seeks to encrypt communication between nodes reducing the risks of attacks via tampering with transactions.

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"This proposal for a new P2P protocol version (v2) aims to improve upon this by raising the costs for performing these attacks substantially, primarily through the use of unauthenticated, opportunistic transport encryption," according to the proposal. A key benefit is that "encryption, even when it is unauthenticated and only used when both endpoints support v2, impedes eavesdropping by forcing the attacker to become active."

The existing V1 transport protocol remains supported. Users must enable V2 in order to start using it.

BIP324 was introduced by prominent Core contributor Dhruvkaran Mehta, who stepped away from the project in April this year to focus on a Bitcoin-related startup idea.

The upgrade also includes various changes to remote call procedures (RPCs), including those related to wallets and changes to Bitcoin's graphical user interface (GUI).

Read More: Bitcoin Inscriptions Divide BTC Community Amid Network Congestion, but Are 'Unstoppable'




Bitcoin CoreBitcoin NetworkUpgrades
Jamie Crawley

Jamie has been part of CoinDesk's news team since February 2021, focusing on breaking news, Bitcoin tech and protocols and crypto VC. He holds BTC, ETH and DOGE.

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