In a rigorously worded submit to X that earned over 500,000 impressions, blockchain analytics supplier Arkham claimed that it had in some way deanonymized a few of Zcash’s shielded transactions.
Shielded “z-address” transactions, which make up roughly one fifth of all Zcash transactions, are presupposed to be fully personal.
Nevertheless, Arkham claimed to have labeled “more than half of Zcash’s shielded and unshielded transactions,” naming the people and establishments accountable for almost all of the info on the blockchain.
The submit instantly earned a number of Neighborhood Notes, X’s volunteer fact-checking system, introduced in after Elon Musk fired the platform’s precise fact-checkers.
The highest two notes disputed the declare that Arkham had deanonymized shielded transactions.
“Z-Z transactions have not been deanonymized,” wrote one contributor. “Arkham only provides data for the remaining ~80% of transparent transactions.”
The second be aware agreed. “Arkham did nothing groundbreaking here despite the clickbait title,” it learn.
“Deanonymization” is deceptive.
They’ve added monitoring for exchanges that use T addresses for his or her buying and selling.
They have not tracked Zcashs personal transactions: looking for Z addresses returns no info. https://t.co/Ya82pENQ7U
— mine Zcash ᙇ🛡 (@mineZcash) December 8, 2025
Arkham perpetuates confusion about deanonymizing Zcash
Disingenuously, Arkham included each shielded and unshielded transactions in its declare to have deanonymized “more than half” of Zcash transactions, with out disaggregating the contribution of the 2 teams.
Technically, a lawyer may argue that 0% of shielded and 100% of unshielded, altogether, account for “more than half” of Zcash transactions.
Clearly, it’s totally unclear why Arkham would have included the phrase “shielded” in any respect on this instance, regardless of its operate as a authorized loophole.
Unapologetically, Arkham cited its supposed transparency of the US authorities’s seizure of Zcash from AlphaBay founder Alexandre Cazes eight years in the past.
Enraged, Zcash customers shortly jumped into the remark part to dispute Arkham’s discovery. One person supplied fee if Arkham may deanonymize his shielded deal with.
One other person requested Arkham to make clear that it may hint shielded-to-shielded (z-to-z) transactions.
Faux information about Arkham deanonymizing Zcash
Longtime followers of Zcash are conscious of unshielded defaults. As a result of Zcash determined to make privateness opt-in versus opt-out, the default conduct of most senders is to broadcast unshielded, t-transactions.
After about 18 hours had transpired since its unique declare, it lastly posted an admission, writing, “z->z transactions are not accounted for in the 50% of Zcash transactions labeled.”
Though it had the chance to apologize and retract its unique declare, it declined. Even the admission took the founding father of Zcash himself, Zooko Wilcox-O’Hearn, forcing Arkham’s hand about its disingenuous inclusion of shielded transactions in its unique, lumpy, and inaccurate declare that merely referred to unshielded transactions alone.
