{"id":29601,"date":"2026-05-25T22:07:23","date_gmt":"2026-05-25T22:07:23","guid":{"rendered":"https:\/\/bitunikey.com\/news\/arkham-tracks-53-of-zcash-privacy-transactions\/"},"modified":"2026-05-25T22:07:36","modified_gmt":"2026-05-25T22:07:36","slug":"arkham-tracks-53-of-zcash-privacy-transactions","status":"publish","type":"post","link":"https:\/\/bitunikey.com\/news\/arkham-tracks-53-of-zcash-privacy-transactions\/","title":{"rendered":"Arkham tracks 53% of Zcash privacy transactions"},"content":{"rendered":"<p><\/p>\n<div class=\"post-detail__content blocks\">\n<p class=\"is-style-lead\">Zcash privacy claims faced a direct challenge after Arkham Intelligence linked 53% of ZEC transactions to identified entities.<\/p>\n<div id=\"cn-block-summary-block_153e8b489ad81aea394337ab22179cdd\" 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>Arkham Intelligence labeled over 53% of all Zcash transactions and linked $420 billion in ZEC volume to identifiable individuals and institutions.<\/li>\n<li>The tracking covers 48% of all transaction inputs and outputs and 37% of total ZEC balances, approximately $2.5 billion, per Arkham\u2019s published research.<\/li>\n<li>Zcash founder Zooko Wilcox clarified that fully shielded-to-shielded transactions remain cryptographically protected and that Arkham cannot access the shielded pool.<\/li>\n<\/ul><\/div>\n<\/div>\n<p><!-- .cn-block-summary --><\/p>\n<p>Blockchain analytics firm Arkham Intelligence <a rel=\"nofollow\" target=\"_blank\" href=\"https:\/\/info.arkm.com\/research\/how-to-track-zcash-transactions\" target=\"_blank\" rel=\"nofollow\">published<\/a> research revealing it had labeled more than 53% of all Zcash transactions, attributing approximately $420 billion in ZEC volume to identifiable individuals and institutions. The research, published in December 2025, triggered immediate debate about the true extent of Zcash\u2019s opt-in privacy model.<\/p>\n<p>Arkham\u2019s tracking covers 48% of all transaction inputs and outputs and links 37% of total ZEC balances, approximately $2.5 billion, to named entities. The firm did not crack Zcash\u2019s cryptography. It combined entity clustering, exchange data, known government seizures, and transparent address analysis to attribute activity to real-world actors.<\/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=\"550\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">How to Track ZCash Transactions<\/p>\n<p>Zcash is a privacy-focused cryptocurrency built on Bitcoin\u2019s codebase, using zk-SNARKs to hide transaction data on-chain.<\/p>\n<p>Our research team wrote a guide on how Zcash works, why most ZEC activity is still traceable, and how to track it with\u2026 <a rel=\"nofollow\" target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/t.co\/87kLo2I0mC\">pic.twitter.com\/87kLo2I0mC<\/a><\/p>\n<p>\u2014 Arkham (@arkham) <a rel=\"nofollow\" target=\"_blank\" href=\"https:\/\/twitter.com\/arkham\/status\/2058787129749065977?ref_src=twsrc%5Etfw\" target=\"_blank\" rel=\"nofollow\">May 25, 2026<\/a><\/p><\/blockquote>\n<\/div>\n<\/figure>\n<h2 class=\"wp-block-heading\">Why Arkham can track most Zcash activity but not all of it<\/h2>\n<p>The critical distinction is between transparent and shielded transactions. Zcash\u2019s privacy is opt-in. Users choose between T-addresses, which are fully visible on the public ledger, and Z-addresses, which use zero-knowledge proofs to shield sender, recipient, and amount.<\/p>\n<p>\u201c[Arkham] didn\u2019t actually deanonymize any ZEC that was held at rest in the shielded pool,\u201d Zcash founder Zooko Wilcox said in response to the announcement. Tracking such transactions would be \u201cimpossible because the information just isn\u2019t there,\u201d he added.<\/p>\n<p>    <!-- .cn-block-related-link --><\/p>\n<p>As of December 2025, fewer than a quarter of all ZEC in circulation sat in the shielded pool. The majority of activity passes through transparent addresses, particularly on centralised exchanges which almost exclusively use T-addresses. Crypto.news has tracked the capital dynamics driving ZEC\u2019s recent 73% monthly gain as the quantum and privacy narrative drives fresh interest.<\/p>\n<h3 class=\"wp-block-heading\">Why the Arkham disclosure matters as ZEC rallies and NU7 approaches<\/h3>\n<p>The controversy resurfaced in May 2026 as ZEC rallied sharply on quantum computing concerns and the approaching NU7 network upgrade. The Orchard shielded pool provides stronger privacy guarantees than the older Sapling pool, but still holds a minority of ZEC activity. <\/p>\n<p>Until shielded pool usage expands significantly, Arkham-style behavioural analysis of transparent activity will remain possible for the majority of network transactions.<\/p>\n<p>Crypto.news has covered the quantum threat timeline, including research showing Bitcoin\u2019s elliptic curve cryptography requires approximately 2,330 logical qubits to break. Privacy protocols with zero-knowledge proof infrastructure are increasingly discussed as potential safe harbors as those timelines accelerate. <\/p>\n<p>Crypto.news has also noted Citi\u2019s analysis that a quantum attack on major financial institutions could put $2 to $3.3 trillion of GDP at risk, context that makes Zcash\u2019s NU7 privacy improvements directly relevant to institutional risk managers watching the space.<\/p>\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>Zcash privacy claims faced a direct challenge after Arkham Intelligence linked 53% of ZEC transactions to identified entities. Summary Arkham Intelligence labeled over 53% of all Zcash transactions and linked&hellip;<\/p>\n","protected":false},"author":1,"featured_media":29602,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-29601","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\/29601","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=29601"}],"version-history":[{"count":1,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/posts\/29601\/revisions"}],"predecessor-version":[{"id":29603,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/posts\/29601\/revisions\/29603"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/media\/29602"}],"wp:attachment":[{"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/media?parent=29601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/categories?post=29601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bitunikey.com\/news\/wp-json\/wp\/v2\/tags?post=29601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}