According to ME News, on August 2 (UTC+8), Coldcard hardware wallet manufacturer Coinkite tweeted that it has sent security advisory emails to all reachable user addresses via its store and newsletter subscription system, with emails being dispatched in batches since last Friday. If users receive this email, they can confirm it is genuinely from Coinkite. Coinkite also reminded users to rely solely on the latest timestamped announcements posted on its official blog, and not to trust screenshots, forwarded messages, aggregated information, or unverified sources; firmware should only be downloaded from coldcard.com/downloads. Coinkite will never ask for users’ PIN codes, seed phrases, or BIP-39 passphrases, nor will it request users to sign any unverified PSBT transactions. (Source: Foresight News)
Coldcard Sends Security Announcement Emails to All Reachable Users
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Summary
On August 2 (UTC+8), Coldcard issued a project announcement, informing users via email about a potential security breach. Emails were sent in batches beginning last Friday to all reachable addresses. Coinkite emphasized that users should refer exclusively to timestamped updates on its official blog and avoid unverified sources. Firmware must be downloaded only from coldcard.com/downloads. The company reiterated that it will never request PINs, mnemonics, or ask users to sign unverified PSBT transactions.
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