{"id":6253,"date":"2025-07-30T12:43:07","date_gmt":"2025-07-30T12:43:07","guid":{"rendered":"https:\/\/bitunikey.com\/news\/eth-builders-develop-new-poaprivacy-tools-ahead-of-10-year-anniversary\/"},"modified":"2025-07-30T12:43:14","modified_gmt":"2025-07-30T12:43:14","slug":"eth-builders-develop-new-poaprivacy-tools-ahead-of-10-year-anniversary","status":"publish","type":"post","link":"https:\/\/bitunikey.com\/news\/eth-builders-develop-new-poaprivacy-tools-ahead-of-10-year-anniversary\/","title":{"rendered":"ETH builders develop new POAPrivacy tools ahead of 10 year anniversary"},"content":{"rendered":"<p><\/p>\n<div class=\"post-detail__content blocks\">\n<p class=\"is-style-lead\">As ETH celebrates its 10th anniversary, it brings into focus everything that the project has accomplished \u2014 enabling DeFi, smart contracts, and sprouting a vibrant ecosystem of dApps built on privacy.<\/p>\n<div id=\"cn-block-summary-block_e462dd451beb26591a0451c8b76e9964\" class=\"cn-block-summary\">\n<div class=\"cn-block-summary__nav tabs\">\n        <span class=\"tabs__item is-selected\">Summary<\/span>\n    <\/div>\n<div class=\"cn-block-summary__content\">\n<ul class=\"wp-block-list\">\n<li>Despite Ethereum\u2019s success in DeFi and dApps, protecting sensitive personal data remains a major unresolved issue.<\/li>\n<li>One area where this challenge is clear is POAPs (Proof of Attendance Protocols), NFTs often used to verify event attendance.<\/li>\n<li>POAPs create privacy risks by publicly linking wallets to specific times and locations, exposing users\u2019 real-world presence.<\/li>\n<li>POAPrivacy, unveiled at ETHGlobal Cannes, uses stealth addresses to protect attendance data and prevent on-chain tracking, addressing this vulnerability.<\/li>\n<\/ul><\/div>\n<\/div>\n<p><!-- .cn-block-summary --><\/p>\n<p>As Ethereum (ETH) celebrates its 10th anniversary, it brings into focus everything that the project has accomplished \u2014 enabling DeFi, smart contracts, and sprouting a vibrant ecosystem of dApps. But it also shines a spotlight on the challenges that remain. One such challenge is privacy, a cornerstone of digital freedom that remains elusive on a public blockchain.<\/p>\n<p>Despite a decade of innovation, Ethereum still struggles to protect users\u2019 personal data. On-chain transparency, once hailed as a feature, is increasingly seen as a liability, especially when applied to real-world contexts like health and identity.<\/p>\n<p>This tension came into sharp focus onstage at ETHCC in Berlin earlier this summer, where privacy advocate Migle Rakitaite publicly challenged the Ethereum Foundation for failing to fund or prioritize crypto-native tools that safeguard deeply personal data like reproductive health. <\/p>\n<p>That exchange not only inspired the creation of PrivyCycle \u2014 an app that ranked among ETHCC\u2019s top 10 projects out of 334 entries and won three separate sponsor prizes \u2014 but, more importantly, highlighted how underprepared the Ethereum ecosystem remains for handling sensitive, non-financial information.<\/p>\n<p>    <!-- .cn-block-related-link --><\/p>\n<h2 class=\"wp-block-heading\">The issue of on-chain privacy<\/h2>\n<p>The concern of on-chain privacy has only grown more urgent in a world of escalating surveillance and shrinking personal boundaries. Ethereum co-founder Vitalik Buterin underscored the stakes at in late May, <a rel=\"nofollow\" target=\"_blank\" href=\"https:\/\/x.com\/ETHGlobal\/status\/1928532751780581804\" target=\"_blank\">stating<\/a>: \u201cOn a civilizational level, there\u2019s quite a lot of urgency in us figuring out privacy.\u201d He called on developers to focus on four key pillars of privacy: <strong>private money, private identity, private voting, and private messaging.<\/strong><\/p>\n<p>But as the POAPrivacy demo at ETHGlobal Cannes revealed, there\u2019s another emerging frontier in the fight for on-chain privacy: <strong>private presence.<\/strong><\/p>\n<p>POAPs \u2014 short for Proof of Attendance Protocols \u2014 were designed as digital mementos, allowing users to collect NFTs that prove they attended specific events. From hackathons to crypto conferences, they\u2019ve become a kind of Web3 keepsake as well as a signal of participation, community engagement, and even eligibility for rewards or governance.<\/p>\n<p>However, beneath that utility lies a quiet but serious privacy risk. Each POAP minted on-chain links a user\u2019s wallet to a specific location and time, effectively creating a public breadcrumb trail of their whereabouts.<\/p>\n<p>\u201cAnyone can basically track your footsteps,\u201d a dev explained during the demo. \u201cWe love POAPs, but they come at a cost of privacy.\u201d<\/p>\n<p>In an environment where wallet addresses are easily traced and cross-referenced, this can compromise not only personal privacy but also safety \u2014 especially for activists, public figures, or anyone seeking to separate their digital and physical lives.<\/p>\n<p>    <!-- .cn-block-related-link --><\/p>\n<h2 class=\"wp-block-heading\">POAPrivacy: protecting presence on the blockchain<\/h2>\n<p>To address this overlooked vulnerability, a team at ETHGlobal Cannes unveiled POAPrivacy \u2014 a tool designed to verify presence on-chain without exposing users\u2019 real-world locations or linking back to their primary wallet addresses.<\/p>\n<p>At the heart of the system is a clever use of stealth addresses \u2014 a cryptographic technique that enables users to receive tokens at unique, one-time addresses that are unlinkable to their main wallet. <\/p>\n<h3 class=\"wp-block-heading\">How it works:<\/h3>\n<ul class=\"wp-block-list\">\n<li>Users scan a QR code at an event.<\/li>\n<li>Instead of minting to their main address, they generate a random stealth address using a stealth meta-address derived from their ENS (Ethereum Name Service) identity.<\/li>\n<li>The system generates two cryptographic keys:\n<ul class=\"wp-block-list\">\n<li>A spending key (for later claiming)<\/li>\n<li>A viewing key (for selectively revealing POAPs to trusted parties)<\/li>\n<\/ul>\n<\/li>\n<li>Minting is handled off the main address, meaning observers can\u2019t trace a POAP back to the user\u2019s wallet.<\/li>\n<\/ul>\n<p>The project also demoed a private dashboard where users can log in with passkeys, view their privately stored POAPs, and retrieve them as needed. The core cryptography draws on an underutilized Ethereum standard introduced several years ago but rarely deployed at scale.<\/p>\n<p>\u201cMagic and cryptography is happening,\u201d the team explained, \u201cand you\u2019ll be able to see your POAPs \u2014 but others won\u2019t.\u201d<\/p>\n<p>While still a prototype, the project received praise for addressing a major privacy vulnerability in POAPs \u2014 one of Ethereum\u2019s most widely used features for event attendance verification, community engagement, and access to exclusive rewards or governance. <\/p>\n<p>The project was named one of the top 10 finalists out of 334 entries at ETHGlobal Cannes 2025 \u2014 alongside other privacy-focused builds like the previously mentioned PrivyCycle and PrivacyLinks \u2014 highlighting a growing push to strengthen Ethereum\u2019s social layer with privacy-preserving infrastructure.<\/p>\n<figure class=\"wp-block-embed is-type-rich is-provider-twitter wp-block-embed-twitter\">\n<div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">\ud83e\udd41\ud83e\udd41\ud83e\udd41 The ETHGlobal Cannes 2025 finalists are in! \ud83c\uddeb\ud83c\uddf7<\/p>\n<p>We&#39;re thrilled to share 10 projects that stuck out from 334 built:<\/p>\n<p>\u26a1\ufe0f BeamPay<br \/>\ud83d\udee1\ufe0f OnlyDanks<br \/>\ud83d\ude1b PolyBet<br \/>\ud83d\udc10 livestakes<br \/>\ud83d\udc5f Pace Club<br \/>\ud83c\udd7f\ufe0f POAPrivacy<br \/>\ud83e\ude78 PrivyCycle<br \/>\ud83c\udf08 ChromaMind<br \/>\u267b\ufe0f PrivacyLinks<br \/>\ud83c\udf09 Hashlocked<\/p>\n<p>Dive in to each below!\u2026<\/p>\n<p>&mdash; ETHGlobal (@ETHGlobal) <a href=\"https:\/\/twitter.com\/ETHGlobal\/status\/1941863125759984042?ref_src=twsrc%5Etfw\">July 6, 2025<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div>\n<\/figure>\n<p>    <!-- .cn-block-related-link --><\/p><\/div>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>As ETH celebrates its 10th anniversary, it brings into focus everything that the project has accomplished \u2014 enabling DeFi, smart contracts, and sprouting a vibrant ecosystem of dApps built on&hellip;<\/p>\n","protected":false},"author":1,"featured_media":6254,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6253","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cryptocurrency"],"_links":{"self":[{"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/posts\/6253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/comments?post=6253"}],"version-history":[{"count":1,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/posts\/6253\/revisions"}],"predecessor-version":[{"id":6255,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/posts\/6253\/revisions\/6255"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/media\/6254"}],"wp:attachment":[{"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/media?parent=6253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/categories?post=6253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/tags?post=6253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}