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The Ethereum Foundation has backed default privacy in wallets by sharing an update on Kohaku, a software development kit integrating three privacy protocols, and arguing that attackers should have less access to users\u2019 onchain histories.<\/p>\n
\n Summary<\/span>\n <\/p>\n <\/p>\n In its Oct. 26 X post<\/a>, the Ethereum Foundation said that the past week\u2019s attacks and exploits had reinforced its view that privacy and security belong together. Its message quoted Jordan Enev\u2019s update on Kohaku, which named Railgun, Privacy Pools and Tornado Cash among the SDK\u2019s integrations.<\/p>\n \u201cWe\u2019re glad to support wallet tools advancing privacy,\u201d the Foundation wrote.<\/p>\n \u201cYou can worry less about an attacker utilizing your onchain history against you when privacy is a default.\u201d<\/p>\n<\/blockquote>\n The Foundation\u2019s statement focused on limiting the information available to attackers. Enev\u2019s accompanying post addressed the work needed to put privacy features inside wallets, describing Ambire\u2019s integration efforts and a planned demonstration at Devcon.<\/p>\n <\/p>\n Enev said the Kohaku team was working to make privacy a normal part of Ethereum and described its SDK as becoming more mature. After naming the three protocol integrations, he called on wallet developers to take the next step.<\/p>\n \u201cNow it\u2019s time for wallets to do their part,\u201d he wrote in the Oct. 23 post.<\/p>\n At Ambire, Enev said, the team had spent the previous few months exploring Kohaku, testing integrations with different privacy protocols and working with its developers to provide feedback. He described the team as closer than ever to its first integration.<\/p>\n His account of that work covered testing and development, with no public release date attached. The post pointed readers toward a Devcon presentation featuring Nicolas Consigny and Ethereum co-founder Vitalik Buterin.<\/p>\n Kohaku\u2019s public SDK repository lists separate libraries for Railgun, Tornado Cash and Privacy Pools. Its package table describes a standardized interface for shielded-pool protocols, a provider component supporting several Ethereum software tools, and a post-quantum account implementation.<\/p>\n The repository<\/a> warns that some components remain works in progress and that its packages contain unaudited code. Its Railgun package is listed as under maintenance.<\/p>\n A separate repository describes<\/a> the Kohaku browser wallet as a reference implementation built from Ambire\u2019s wallet code. The README identifies Sepolia testnet as its supported network and offers a prebuilt demonstration dated March 2026.<\/p>\n The Devcon schedule lists<\/a> \u201cKohaku: privacy for everyone, by default\u201d for Nov. 3 on Lotus Stage 2, with Consigny and Buterin as speakers. The description calls for a demonstration on Ethereum mainnet using Ambire Wallet.<\/p>\n Organizers expect to show privacy protocol integrations, light clients, post-quantum accounts, and hardware wallet clear signing. The session description presents those features as expected demonstration material.<\/p>\n The listing says the speakers will explain how light clients reduce the amount of trust a wallet places in outside infrastructure. It describes embedding privacy protocols inside a wallet so users can access their protections without having to understand the underlying systems.<\/p>\n Fetching token prices and logos through decentralized methods is another planned feature. The session description says this would avoid revealing the tokens a user interacts with to third parties.<\/p>\n Consigny\u2019s speaker biography identifies him as the Foundation researcher leading Kohaku, with work spanning wallets, privacy protocols, and post-quantum cryptography.<\/p>\n The Foundation introduced Kohaku in its October 2025 privacy commitment as a reference wallet and open-source SDK. The same announcement described a privacy cluster of 47 researchers, engineers, coordinators and cryptographers, coordinated by Igor Barinov.<\/p>\n Its Institutional Privacy Task Force was tasked with translating businesses\u2019 regulatory and operational requirements into technical privacy specifications. The announcement listed payments, trading, funds, assets and compliance among its areas of work.<\/p>\n Separate work on transaction fees has reached Ethereum\u2019s upgrade discussions. As crypto.news previously reported, researcher Toni Wahrst\u00e4tter described proposals in August that could let privacy pools pay<\/a> network fees without a separate relayer.<\/p>\n Wahrst\u00e4tter\u2019s proposal combined Frame Transactions with other transaction changes and Fork-Choice Enforced Inclusion Lists, known as FOCIL. The August report identified FOCIL as confirmed for Hegot\u00e1, while Frame Transactions remained under consideration.<\/p>\n Account security has featured in Kohaku research as well. In June, Consigny described post-quantum account protection<\/a> that could be added without waiting for a hard fork, citing an estimated cost of $0.07 per account at the time.<\/p>\n An October report on the Foundation\u2019s zkAPI project described another privacy application, developed with Open Anonymity Project. The system separates proof of payment<\/a> for AI services from the funding identity, while the model provider still receives the user\u2019s prompt.<\/p>\n The US Treasury announced the removal of economic sanctions against Tornado Cash on March 21, 2025, following its review of the legal and policy issues involved in applying sanctions to activity using emerging technologies.<\/p>\n In that announcement, Treasury maintained its concerns about North Korea\u2019s state-sponsored hacking and money laundering. The department said it would continue monitoring transactions that could benefit malicious cyber actors or North Korea and cautioned US persons about transactions presenting those risks.<\/p>\n <\/p><\/div>\n\n\n
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Ethereum wallet privacy work moves toward Ambire integration<\/h2>\n
Kohaku\u2019s Devcon session plans a mainnet demonstration<\/h2>\n
Ethereum researchers have proposed changes to privacy transactions<\/h2>\n
US Treasury removed Tornado Cash sanctions in March 2025<\/h2>\n