COLDCARD

How the new COLDCARD seed generation works (MK4/MK5 ≥5.6.1 and Q ≥1.5.1Q):

Track the security status here: coldcard.com/security/status

Explore the interactive tool and source code here: scgbckbone.github.io/seedflow/

We are investigating how a post containing a phishing link was published from this account. It has since been deleted.

Do not visit or interact with that link. COLDCARD’s only official website is coldcard.com.

This account has used offline 2FA with tightly restricted access since 2017. We have contacted @X and are reviewing all account access.

We will share further verified updates here.

Press 2 at the OK TO SEND? screen to open Transaction Explorer. Step through every input being spent and every destination or change output instead of approving from a summary alone.

coldcard.com/docs/ready-to-…

A clear case is not decoration. It lets you inspect a COLDCARD for a component swap or implant. The tamper-evident bag, anti-phishing words, dual Secure Elements and verified firmware add independent checks. That’s defense in depth.

coldcard.com/docs/physical-…

The transaction approval screen shows the outgoing total, fee, input/output counts, destinations, and change. COLDCARD signs only after you review and confirm on-device.

coldcard.com/docs/ready-to-…