10 December 2025

Did Arkham deanonymize Zcash? Not really.

Did Arkham deanonymize Zcash? Not really.
Arkham posted a flashy claim about linking 53 of Zcash transactions public private to known entities, with labeled volume exceeding 420B. This sparked backlash, as many took it as a hint that shielded ZEC transactions were cracked.
Reality check: Arkham works only with the transparent part of the network. No shielded data was broken.
Zcash co-founder Zooko confirmed that deanonymizing shielded ZEC is impossible, since the data simply doesn t exist Arkham is just tracking wallets that chose public transparency.

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